Customer Service Hotline:
+8613261677119
+8613261677119
The WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks ships with these headline parameters: alarm threshold two configurable level set points, default low-level alarm at 20% and high-level alarm at 95% of tank capacity, accuracy class 0.5% fs hydrostatic and +/-0.25% of range ultrasonic, nist-traceable calibration certificate issued per unit, response time level update every 1 s locally, radio report every 15 min nominal and within 5 s of any set-point breach, power supply 3.6v er34615 lithium cell, 3-year service life at a 15 min report interval, or 24v dc loop power on the wired variant drawing 30 ua standby, 120 ma peak transmit, output 4g lte cat-1 uplink with mqtt plus rs485 modbus rtu, ultrasonic 0-10 m range for open tanks and reservoirs, coverage ultrasonic measuring range 0-10 m with a 0.5 m dead band, up to 48 meters per gateway, alarm output local lcd level readout plus platform alert, sms and pump-room annunciator relay output, ip68 submersible probe, ip65 electronics housing enclosure, -10 deg c to +60 deg c process, -10 deg c to +55 deg c ambient electronics operating range and probe 28 mm diameter x 132 mm length with a 10 m cable, 920 g net. As of September 22, 2026, Wanlin Group (Shenzhen, China) officially launches its 2026 carbon monoxide alarm export programme, featuring the WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks as the flagship OEM and ODM component for overseas buyers, cross-border trading companies, landlord portfolio managers, hotel and resort groups, parking and tunnel operators, marina and caravan dealers, HVAC contractors, safety products distributors and regional importers who source CO detection hardware from a China-based source factory under the Wanlin brand. The programme targets importers, tender bidders, housing associations and letting agents, senior living and student housing operators, hotel and hostel chains, retail and fuel forecourt groups, industrial plant owners, data centre and colocation operators, system integrators and wholesale distributors who now buy carbon monoxide protection by the thousand instead of the dozen, and who source it directly from a Chinese manufacturer rather than paying the western brand premium of Kidde, First Alert, BRK, X-Sense, Ei Electronics, Aico, FireAngel, Honeywell, Bosch or Siemens. Wanlin Group as the carbon monoxide alarm supplier, exporter and original manufacturer now opens its doors to global local partners, regional exclusive distributors, overseas cooperation partners and strategic OEM clients across 60+ destination markets.
Core parameters: WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks, hydrostatic pressure head measurement on a submersible probe, or non-contact ultrasonic time-of-flight for open tanks, converted to level and volume. Sensing element 316l submersible hydrostatic probe with a ceramic sensing diaphragm, or a 60 khz ultrasonic transducer with temperature-compensated time of flight. Alarm threshold two configurable level set points, default low-level alarm at 20% and high-level alarm at 95% of tank capacity. Accuracy class 0.5% fs hydrostatic and +/-0.25% of range ultrasonic, nist-traceable calibration certificate issued per unit. Response time level update every 1 s locally, radio report every 15 min nominal and within 5 s of any set-point breach. Power supply 3.6v er34615 lithium cell, 3-year service life at a 15 min report interval, or 24v dc loop power on the wired variant. Power consumption 30 ua standby, 120 ma peak transmit. Output signal 4g lte cat-1 uplink with mqtt plus rs485 modbus rtu, ultrasonic 0-10 m range for open tanks and reservoirs. Coverage area ultrasonic measuring range 0-10 m with a 0.5 m dead band, up to 48 meters per gateway. Alarm output local lcd level readout plus platform alert, sms and pump-room annunciator relay output. IP rating ip68 submersible probe, ip65 electronics housing. Operating temperature -10 deg c to +60 deg c process, -10 deg c to +55 deg c ambient electronics. Humidity range 10-95% rh non-condensing, probe rated for permanent immersion. Housing material 316l stainless-steel probe body with a polycarbonate v-0 electronics housing and a pur vented cable. Dimensions and weight probe 28 mm diameter x 132 mm length with a 10 m cable, 920 g net. Certifications CE / EN 61326 / RoHS / REACH / FCC / NIST-traceable calibration / 4G LTE Cat-1 carrier acceptance. The 2026 carbon monoxide range is built on WANLIN-CO210 sealed 10-year battery CO alarms to EN 50291-1 and EN 50291-2 with UL 2034 documentation on request, WANLIN-CO330 smart LCD CO alarms reporting over Wi-Fi, NB-IoT and 4G LTE Cat-1 with app push, SMS and voice call escalation, WANLIN-CO560 industrial two-stage CO detectors driving garage and tunnel ventilation through relay and Modbus fan control, WANLIN-AIR620 multi-parameter hazard nodes with an electrochemical CO channel, WANLIN-303 combination-class detectors with 433 MHz interconnect, WANLIN-307 and WANLIN-309 IoT detectors on LoRaWAN, NB-IoT, 4G LTE Cat-1 and Wi-Fi, WANLIN-340 rate-of-rise heat detectors in A1R, A2S, BR and CS classes to EN 54-5, WANLIN-222 resettable wireless call points to EN 54-11, WANLIN-656 sounder strobes to EN 54-3 and EN 54-23, WANLIN-860 wireless fire alarm panels to EN 54-2, EN 54-4 and EN 54-21, WANLIN-705 smart electrical fire monitors to GB 14287.2 and GB 14287.3, WANLIN-868D LoRa concentrator gateways with Modbus TCP, MQTT and BACnet IP, WANLIN-770 wireless pressure gauges to EN 837-1, WANLIN-780 wireless level meters to EN 61326, WANLIN-365 combustible gas detectors to EN 50194, WANLIN-260 home fire safety kits, WANLIN-710 Wi-Fi smart circuit breakers to GB 16917 and the A119-YW aerosol test gun and heat detector tester used for commissioning and periodic inspection rounds, shipped with CE, UKCA, UL 2034, FCC, CCCF and SASO documentation packages.
Executive summary - 12 buyer-relevant points:
- Flagship model WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks, hydrostatic pressure head measurement on a submersible probe, or non-contact ultrasonic time-of-flight for open tanks, converted to level and volume
- Sensing element 316l submersible hydrostatic probe with a ceramic sensing diaphragm, or a 60 khz ultrasonic transducer with temperature-compensated time of flight
- Alarm threshold two configurable level set points, default low-level alarm at 20% and high-level alarm at 95% of tank capacity
- Accuracy and response 0.5% fs hydrostatic and +/-0.25% of range ultrasonic, nist-traceable calibration certificate issued per unit / level update every 1 s locally, radio report every 15 min nominal and within 5 s of any set-point breach
- Power and consumption 3.6v er34615 lithium cell, 3-year service life at a 15 min report interval, or 24v dc loop power on the wired variant / 30 ua standby, 120 ma peak transmit
- Output signal 4g lte cat-1 uplink with mqtt plus rs485 modbus rtu, ultrasonic 0-10 m range for open tanks and reservoirs
- Coverage and notification ultrasonic measuring range 0-10 m with a 0.5 m dead band, up to 48 meters per gateway / local lcd level readout plus platform alert, sms and pump-room annunciator relay output
- 19 CO detection and companion hardware families from one factory: WANLIN-CO210 sealed 10-year CO alarms, WANLIN-CO330 smart LCD CO alarms, WANLIN-CO560 industrial two-stage CO detectors, WANLIN-AIR620 multi-parameter hazard nodes, WANLIN-303 combination-class detectors, WANLIN-307 and WANLIN-309 IoT detectors, WANLIN-340 heat detectors, WANLIN-222 call points, WANLIN-656 sounder strobes, WANLIN-705 electrical fire monitors, WANLIN-860 fire alarm panels, WANLIN-770 pressure gauges, WANLIN-780 level meters, WANLIN-365 gas detectors, WANLIN-260 home kits, WANLIN-868D gateways, WANLIN-710 smart breakers and the A119-YW detector tester
- MOQ 200 pcs, lead time 20-28 days, EXW / FOB Shenzhen / CFR / CIF / DDP supported, 24 months warranty
- Flagship field reference Rental portfolio compliance retrofit across 4,000 units, Manchester, United Kingdom: A housing association operating 4,000 units across Greater Manchester needed CO alarms in .
- Target buyer: importer, tender bidder, housing association and letting agent, senior living and student housing operator, hotel and hostel chain, parking and tunnel operator, marina and caravan dealer, HVAC contractor, industrial plant owner, safety products distributor, cross-border trading company
- Contact: wanlinfirecontrol@163.com / +8613261677119 / www.wanlinfire.com
This article is written for B2B buyers in Alexandria, Egypt who understand that carbon monoxide is the poison that behaves like weather: invisible, odourless, and fatal in exactly the rooms where people sleep through it. The United States Consumer Product Safety Commission staff estimates around 170 accidental non-fire CO poisoning deaths per year in the United States alone, with more than ten thousand emergency department visits, and European health authorities record the same pattern across every heating season: failed heat exchangers, blocked flues, generators run in the wrong room, engines idling in attached garages. Wanlin Group operates its own manufacturing facility in Shenzhen with SMT lines, electrochemical cell calibration benches, CO test gas chambers and a radio laboratory, exporting sealed residential CO alarms, smart connected CO alarms, industrial two-stage CO detectors and the companion fire safety stack to 60+ countries across Europe, North America, the Middle East, Southeast Asia, Africa, Oceania and Latin America under the Wanlin brand. Everything below is designed against the standard that matters in this product class: the alarm that works on night ten thousand as reliably as night one, the documentation that clears customs and inspection without a re-test, and the placement engineering that puts the cell where the sleeper breathes.
Carbon monoxide alarm demand is now driven by regulation, insurance and litigation in roughly equal parts. England requires a working CO alarm in every room with a fixed combustion appliance in rented dwellings, Scotland extends the duty across the social and private sector, France and Germany impose documented maintenance on the combustion side that increasingly assumes detection on the occupant side, and North American building codes treat listed CO alarms as standard fit in new residential construction. Insurers have followed: portfolio policies in the United Kingdom, hotel groups in Europe and fuel forecourt programmes in the Americas now ask for documented CO monitoring evidence rather than an annual hand-held spot check. The buyers driving it are housing associations and letting agents equipping thousands of rooms, hotel and hostel chains standardising across plant rooms and guest floors, parking and tunnel operators replacing timer-driven ventilation with demand control, caravan and marine dealers factory-fitting alarms that survive salt air and winter storage, and senior living operators who have learned that plain tones do not wake every resident. Contractors, importers and cross-border trading companies supplying Alexandria, Egypt increasingly source this layer from China-based original manufacturers like Wanlin, because the landed cost of a Wanlin sealed CO alarm is 40-60% below Kidde, First Alert, BRK, X-Sense, Ei Electronics, Aico or FireAngel retail-chain equivalents at the same EN 50291 or UL 2034 documented scope, and because one factory covers the sealed battery alarm, the smart connected alarm, the industrial fan-control detector and the test tool on a single shipment with one set of declarations.
Market access in Alexandria, Egypt is anchored on Civil Protection acceptance for port industrial zones with GOEIC registration for the shipment. CO alarms, connected detectors, industrial CO detectors, gateways and control panels shipped into Alexandria, Egypt clear customs on one HS-coded packing list: the radio type-approval reference, the CE and RoHS declarations, the EN 50291 or UL 2034 type-test reference and the per-unit calibration record travel with the pallet, so the insurer review and the local authority acceptance pass without a second shipment or a re-test at destination, which requires a documented conformity route, a declaration referencing EN 50291-1 or UL 2034 as applicable, a radio type-approval reference for the connected models and third-party approval body involvement where the scheme demands it. Cross-border buyers are advised to verify the declaration, the type-test report and the approval body reference of every device prior to import, since non-compliant or un-certificated CO alarms may be rejected by customs authorities, refused by the insurer, or left out of the compliance file that rental and hotel regulations demand.
Reference: EN 50291-1 and EN 50291-2 for residential carbon monoxide alarms, EN 50292 for placement and application practice, UL 2034 for single and multiple station CO alarms, UL 2075 for system-connected gas and vapour detectors, NFPA 720 and NFPA 72 installation practice, BS EN 50291 for the United Kingdom route, CAN/CSA-6.19 for Canada, GB 15322 for the China scheme, radio type-approval for the 433 MHz, LoRaWAN, NB-IoT, LTE and Wi-Fi models, plus local building, gas safety and workplace requirements in the destination market, United States Consumer Product Safety Commission non-fire CO poisoning estimates, and Wanlin Group 2026 carbon monoxide alarm export programme documentation.
The WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks is engineered inside a four-layer CO detection architecture rather than as an isolated device: (1) a sensing layer built on three-electrode electrochemical CO cells with hydrogen cross-sensitivity compensation, temperature and humidity correction, and an end-of-life prediction model, because the cell is the part that quietly dies first and a dead sensor that still chirps healthy is worse than no sensor; (2) a decision layer applying the time-weighted response envelope of EN 50291-1 or UL 2034 rather than a single instantaneous threshold, plus two-stage industrial logic on the CO560 where the first stage drives ventilation and only the second stage alarms; (3) a transport layer choosing per building between 433 MHz interconnect with no recurring fee, LoRaWAN where hundreds of devices sit behind one gateway, NB-IoT or 4G LTE Cat-1 for dispersed single points, Wi-Fi where the IT department approves it, and RS485 Modbus RTU where the fan controller is the integration point; and (4) an evidence layer holding the ppm curve, the event history, the peak memory and the self-test log, because the insurer, the fire officer and the service contractor all argue less when the data series is attached to the file. Because the package is specified as one design, cell selection, thresholds, transport and evidence format all come from the same document rather than four vendors each protecting their own share of the liability.
Three sub-modules define the engineering depth:
The featured model is WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks, part of the Wireless Liquid Level Meter - Hydrostatic and Ultrasonic (LoRaWAN / 4G / 433 MHz) family, configured as the 4g lte cat-1 ultrasonic build (2 variant). FOB Shenzhen reference price is $52.00 per piece at MOQ 200 pcs, with bulk tier pricing ranging $45.24-$57.72 depending on detection class, measuring range, enclosure rating, output protocol variant, certification scope and packaging artwork. Lead time is 20-28 days from PO confirmation and 30% T/T deposit receipt, with 24 months warranty.
The unique technical signature of WANLIN-780 on this variant combination is documented in the table below. Every parameter listed is engineering-verified by our Shenzhen lab and cross-checked against the applicable EN 50291-1, EN 50291-2, UL 2034, EN 54, ISO 7240 or EN 50194 product standard, the declaration of conformity scope, the radio type-approval and the accuracy and response time requirement of the destination market.
| Specification | Value |
|---|---|
| working_principle | Hydrostatic pressure head measurement on a submersible probe, or non-contact ultrasonic time-of-flight for open tanks, converted to level and volume |
| sensing_element | 316L submersible hydrostatic probe with a ceramic sensing diaphragm, or a 60 kHz ultrasonic transducer with temperature-compensated time of flight |
| alarm_threshold | Two configurable level set points, default low-level alarm at 20% and high-level alarm at 95% of tank capacity |
| accuracy_class | 0.5% FS hydrostatic and +/-0.25% of range ultrasonic, NIST-traceable calibration certificate issued per unit |
| response_time | Level update every 1 s locally, radio report every 15 min nominal and within 5 s of any set-point breach |
| power_supply | 3.6V ER34615 lithium cell, 3-year service life at a 15 min report interval, or 24V DC loop power on the wired variant |
| power_consumption | 30 uA standby, 120 mA peak transmit |
| output_signal | 4G LTE Cat-1 uplink with MQTT plus RS485 Modbus RTU, ultrasonic 0-10 m range for open tanks and reservoirs |
| coverage_area | Ultrasonic measuring range 0-10 m with a 0.5 m dead band, up to 48 meters per gateway |
| alarm_output | Local LCD level readout plus platform alert, SMS and pump-room annunciator relay output |
| ip_rating | IP68 submersible probe, IP65 electronics housing |
| operating_temp | -10 deg C to +60 deg C process, -10 deg C to +55 deg C ambient electronics |
| humidity_range | 10-95% RH non-condensing, probe rated for permanent immersion |
| housing_material | 316L stainless-steel probe body with a polycarbonate V-0 electronics housing and a PUR vented cable |
| dimensions_weight | Probe 28 mm diameter x 132 mm length with a 10 m cable, 920 g net |
| certifications | CE / EN 61326 / RoHS / REACH / FCC / NIST-traceable calibration / 4G LTE Cat-1 carrier acceptance |
Wanlin CO alarms and detectors are protecting sleepers, staff and equipment across six continents: a Manchester housing association, ice-fishing cabins on Lake Winnipeg, liveaboard berths in Auckland, Altbau boiler rooms in Berlin, a parking deck in Turin, generator sheds in Lagos, shisha lounges in Riyadh, ski chalets in Tyrol, gosiwon cubicles in Seoul, a guesthouse in Cusco, karaoke rooms in Ho Chi Minh City, a memory care wing in Toronto, food trucks in Austin, ferry cabins on the Aegean, dormitory towers in Krakow, hotels in Prague, caravans on the Gold Coast, a mine camp in Norrbotten, homes above attached garages in Denver, poultry houses in Limpopo, a colocation compound in Jakarta and hostels in Lisbon. Below are 5 detailed scenarios drawn from those deployments, each with a site, a device count, a transport and integration arrangement, an installation window and a measured or witnessed outcome rather than a capability claim.
Scenario 1: Rental portfolio compliance retrofit across 4,000 units, Manchester, United Kingdom. A housing association operating 4,000 units across Greater Manchester needed CO alarms in every room with a fixed combustion appliance before the audit window closed. The argument that decided the specification was not sensitivity but access: tenants remove batteries, and a swapped-out cell voids the compliance record at inspection. The WANLIN-CO210 sealed 10-year build has no battery door at all, so the checkout inspection photographs a single tamper-resistant housing. Gas Safe engineers fitted 4,000 units in 11 working days at roughly 6 minutes per room using the screwless twist plate, and the 433 MHz interconnect variant was used in the 900 flats where a hallway alarm and a boiler-cupboard alarm must sound together. The association logged two genuine incidents in the first winter, both cracked heat exchangers caught at the 50 ppm sustained stage rather than as ambulance calls.
Scenario 2: Ice-fishing cabin fleet, Manitoba, Canada. A cabin rental operator on Lake Winnipeg found that guests run propane heaters overnight in buildings tightened against minus 35 deg C, with the vent flue sometimes packed with snow. Battery alarms bought from a hardware chain died each February because alkaline cells freeze. The fleet standardised on the CO210 sealed lithium build, whose cell and electrochemical element are rated across the full operating window, mounted on the wall away from the direct heater plume per the EN 50292 placement logic. The voice announcement variant was chosen after a guest slept through a plain chirp at 3 a.m. during a blocked-flue event the previous season. Eighty cabins were equipped at 2 units per cabin, and the operator now photographs the green power LED as part of the between-guest turnover checklist.
Scenario 3: Liveaboard marina berths, Auckland, New Zealand. A marina with 140 liveaboard berths had a near-miss traced to a petrol generator running in a cockpit enclosure while the owner slept in the forward cabin. The installer fitted the CO210 interconnect variant in cabin and galley of each vessel, paired as one 433 MHz group, so an exhaust leak under the stern deck reaches the sleeper in the bow within 3 s. Mounting height was deliberately mid-cabin rather than overhead, because cabin airflow from hatches and diesel heaters stratifies CO unpredictably, and a middle position reads the average concentration rather than a pocket. Two boats were flagged in the first season by the pre-alert chirp at sustained 30 ppm, both from cracked water-heater exhaust elbows in the same engine bay, found before any crew symptoms.
Scenario 4: Altbau basement boiler rooms, Berlin, Germany. A property manager of 62 pre-war blocks had recurring tenant complaints of morning headaches in ground-floor flats with aging gas boilers in the basement. The WANLIN-CO330 Wi-Fi build went into each boiler room plus a sealed CO210 in the ground-floor hallway above, and the ppm display, event history and remote diagnostics let the manager watch a slow rise-and-fall pattern every weekday morning. The Gaswart traced it to a cracked heat exchanger on two boilers and a partially blocked flue on a third, all confirmed with a combustion analyser. The audit trail mattered as much as the hardware: the dated ppm curves in the cloud platform were accepted by the building insurer as evidence of a functioning monitoring regime, something the previous annual hand-held spot checks never provided.
Scenario 5: Underground parking deck ventilation control, Turin, Italy. A 900-space municipal garage was running its extraction fans 22 hours a day on a timer because nobody could prove the air was clean. The WANLIN-CO560 went in as a 26-detector grid on two decks, wired as an RS485 Modbus RTU daisy chain into the fan controller, with the stage one threshold at 25 ppm switching the low-speed fan and stage two at 200 ppm forcing full extraction. After commissioning, the fans ran roughly 4.5 hours a day, driven almost entirely by the morning and evening exit peaks of cold-start engines, and the measured annual electricity saving was 61 percent against the timer regime. The two-stage logic also settled a dispute with the ventilation contractor about sensor placement density, because the ppm trend from the first month showed exactly where the dead corners were.
The WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks and the wider Wanlin carbon monoxide alarm programme deliver 10 distinct advantages for cross-border B2B buyers who source CO detection hardware directly from a Chinese manufacturer:
Combined, these advantages allow Wanlin partners to win landlord compliance programmes, hotel and hostel standardisation, parking concession bids, caravan and marine factory-fit contracts, senior living and student housing rollouts, fuel forecourt and retail chain standards, and national distributor frameworks, secure regional distribution rights and serve end customers under their own brand at 40-60% lower landed cost compared to legacy western retail-chain channels.
The WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks carries the following certifications as standard scope: CE / EN 61326 / RoHS / REACH / FCC / NIST-traceable calibration / 4G LTE Cat-1 carrier acceptance. Optional add-on documentation available on request includes VdS (Germany), LPCB (United Kingdom), ETL and FM (global insurance), UL 2034 and ULC listing (North America), ActivFire (Australia), CNBOP-PIB (Poland), ATEX and IECEx for hazardous-area devices, KC (Korea), NOM (Mexico), SASO and SABER (Saudi Arabia), and radio type-approval reports per destination for the 433 MHz, LoRaWAN, NB-IoT, LTE and Wi-Fi models. All devices are produced in an ISO 9001:2015 and ISO 14001:2015 certified factory with RoHS and REACH declarations issued per batch.
Cross-border buyers should note that CO alarm equipment sits across four compliance legs: the device standard such as EN 50291-1, EN 50291-2 or UL 2034, the radio type-approval for connected models in the destination band plan, the installation and placement practice such as EN 50292, NFPA 720 or the local gas safety rules where the device is documented as part of a building system, and the destination conformity route plus environmental declarations. Wanlin supplies a pre-validated compliance pack per model covering DoC templates, type-test references, radio approvals, calibration records and the annual self-test survey template, which typically moves importer approval from a quoted 8-14 weeks down to 2-4 weeks for most markets. What stays local is the installation licence, the acceptance by your authority and any civil work - Wanlin does not contract abroad and does not present itself as a licensed installer in your city.
For a typical first-time buyer ordering 2000 pieces of WANLIN-780 Wireless Liquid Level Meter for Fire Water Tanks and Foam Tanks, the economics stack is:
| Cost Layer | USD per piece | USD for 2000 pcs |
|---|---|---|
| FOB Shenzhen factory price | $52.00 | $104,000.00 |
| + Sea freight FCL 40HQ (estimated) | $9.36 | $18,720.00 |
| CIF destination port | $61.36 | $122,720.00 |
| + Customs duty 3-10% (region dependent) | $3.64 | $7,280.00 |
| + Local delivery + warehousing | $19.50 | $39,000.00 |
| DDP landed cost | $84.50 | $169,000.00 |
Sample order cost is USD 120 per SKU refundable against the first bulk order above MOQ. 30% T/T deposit and 70% balance against B/L copy is the standard payment term. L/C at sight is accepted for orders above USD 80,000. Production lead time is 20-28 days. Warranty is 24 months. Free DOA replacement within 60 days of receipt.
Below are 8 frequently asked questions from overseas buyers, cross-border trading companies and regional distributors sourcing carbon monoxide alarms and CO detection hardware from China. Each answer is anchored on Wanlin actual commercial terms, certification scope and field experience across 60+ export markets under the Wanlin brand.
Answer: EN 50291 is the European residential CO alarm standard and UL 2034 is the North American one, and the difference is mostly the time-weighted response envelope rather than the hardware. Both require the alarm to respond faster as concentration rises: roughly 50 ppm within 60-90 minutes, 100 ppm within 10-40 minutes and 300 ppm within 3 minutes in EN 50291-1, with UL 2034 in the same family of time limits. The CO210 and CO330 families are engineered against the EN 50291-1 envelope as standard scope with UL 2034 documentation available as an add-on scope, so the same platform serves both routes. What you must not do is ship the wrong documentation for the destination: the declaration of conformity, the type-test report and the radio type-approval for wireless models all travel per SKU and per shipment. Our engineers confirm the destination market and the applicable scheme before quoting, because that answer decides the documentation pack and sometimes the housing or marking variant.
Answer: CO has almost the same density as air at room temperature, so it neither pools at the floor like LPG nor rises straight to the ceiling like hot smoke, and placement follows airflow and the appliance rather than a fixed height rule. EN 50292 practice puts the alarm at breathing height in the same room as the appliance, on a wall rather than cramped in a corner, away from windows, vents and dead-air spaces, and in rooms where people sleep when the appliance serves those rooms. In practice our project teams mount at 1.5 m on the wall in the appliance room, mid-wall in corridors, and at breathing height in sleeping rooms, and we document the placement photographs per unit because the acceptance inspection asks for them. In boats, caravans and small cabins the same logic holds: read the average concentration where the sleeper breathes, not a pocket near the exhaust.
Answer: The sealed build wins almost every landlord and operator argument, and the reasoning is operational rather than electrical. Replaceable-cell alarms generate three recurring costs: battery replacement labour or shipping, nuisance chirps that arrive as complaints at unsociable hours, and the compliance gap in the window after a tenant removes a cell. The CO210 sealed 10-year build has no battery door, presents a single tamper-resistant housing at inspection, and removes the entire battery line from the maintenance budget. Mains-powered units like the CO330 suit plant rooms and commercial sites where wiring exists and a display adds value, and the sealed backup cell keeps full alarm function through outages. We quote both with the 10-year total cost side by side, and in our experience the sealed build is cheaper from year three onward once service visits are counted.
Answer: The radio is chosen per building, not per project. Wi-Fi suits sites with an approved guest or IoT VLAN and no recurring fee, and it is the fastest to commission. NB-IoT suits dispersed single points like plant cupboards with no local network, with the lowest power draw and years of battery life. 4G LTE Cat-1 suits sites with no broadband at all, such as generator compounds and remote camps, with the widest roaming. LoRaWAN suits dense campus rollouts where hundreds of devices sit behind one gateway, and the RS485 Modbus wired build on the CO560 suits parking decks and tunnels where the fan controller integration is the point and cabling already runs. The recurring cost question decides more of these choices than the radio specification, so we quote every option with its lifetime connectivity cost before you commit, including the on-premise-only route where policy demands no cloud dependency at all.
Answer: Electrochemical CO cells cross-react with hydrogen, and a CO alarm mounted beside a lead-acid charging bank will read the hydrogen as CO, which is why placement guidance excludes charging rooms and battery halls from standard CO alarm positions. The CO210 and CO330 cells carry a hydrogen cross-sensitivity compensation circuit, and the CO560 industrial build offers the placement separation plus threshold staging that a parking deck or plant room needs. Solvent and silicone vapours during building works are the other classic nuisance source, and the documented answer is the same for every fleet we ship: thresholds are confirmed remotely and logged, the ppm trend is the evidence for every adjustment, and the first month of real data tunes the site profile before the handover signature. An alarm that nuisance-trips destroys trust faster than one that is slightly late, so the tuning month is part of the standard project scope, not an optional extra.
Answer: Combination devices like the WANLIN-303 family reduce ceiling clutter and cost per protected room, and they are the right answer for bedrooms, hallways and rental units where the procurement argument is coverage per dollar. Separate devices win where the smoke and CO risks live in different rooms, where the maintenance replacement cycles differ, or where the tender specification names both device classes separately, which is common in public procurement. There is also a lifecycle argument: a CO cell reaches end of life on its own 10-year clock even when the smoke chamber is still healthy, and in a combination unit that retires the whole device, while separate units retire independently. We publish both routes with the same documentation scope and let the placement plan decide, because the correct answer is a room-by-room decision rather than a project-wide one.
Answer: Standard scope per SKU is EN 50291-1 and EN 50291-2 documentation with CE, RoHS and REACH declarations, radio type-approval for the wireless variants, GB 15322 CCCF references for the China scheme, and UL 2034 documentation as an add-on scope for North American destinations. Factory scope is ISO 9001 and ISO 14001 with RoHS and REACH declarations per batch. Destination-specific documentation such as UKCA, SASO and SABER, EAC, BIS, SIRIM, TISI, SNI, DTI-BPS, NOM, INMETRO and KC is prepared per destination and per shipment, and the NIST-traceable calibration certificate ships per unit on the CO560 industrial family. What stays local is installation licensing, authority acceptance and any civil work: Wanlin does not contract abroad and does not present itself as a licensed installer in your country, and we say so plainly rather than leave the impression otherwise.
Answer: MOQ ranges from 200 pieces on the industrial CO560 family and 300 on the smart CO330 to 1,000 pieces on the high-volume sealed CO210, with mixed-SKU containers accepted on a first order. Standard lead time is 15-28 days depending on model and certification scope. Samples ship in 3-7 days by express for stock SKUs and 7-15 days for special configurations, with sample cost refundable against the first bulk order above MOQ. Standard terms are 30 percent T/T deposit with the balance against bill of lading copy, and L/C at sight is accepted above USD 80,000. Three partnership tiers exist, Authorized Reseller, Regional Distributor and Strategic OEM, each with documented annual volume, discount, exclusivity and joint marketing terms rather than negotiated case by case.
Wanlin carbon monoxide alarm programmes have shipped to 60+ markets across 6 continents, with the United Kingdom, the United States, Germany, Australia, Spain, Indonesia, Nigeria, Saudi Arabia, Poland, Canada, Chile, Japan, Qatar, Portugal, France, Turkiye, South Africa, Thailand, the Philippines, Colombia, Hungary and the United Arab Emirates among the most active sourcing routes. Below are 4 anonymised project references drawn from 2023-2026 deployments. Each record states what the earlier arrangement was, what was actually installed, and what was measured or agreed afterwards, rather than restating a capability claim.
Case 1: Porto hostel network covers seven listed buildings without drilling. A hostel operator in Porto chose the WANLIN-CO210 with the adhesive mount option across seven listed buildings in the historic centre, where the heritage officer refused drilling in tiled stairwells. The installation used 460 alarms across guest rooms and plant cupboards, completed by the operator own maintenance crew in five weeks. The compliance file holds placement photographs per unit and the EN 50291 documentation per SKU. The cloud event history from the CO330 units in the plant cupboards caught one water heater with a recurring evening plateau at 33 ppm on eleven consecutive evenings, and the repair order with the attached log was accepted by the service contractor without dispute, ending a complaint pattern the front desk had fielded for two seasons.
Case 2: Grenoble ski property manager equips 76 chalets before the season. A property manager serving 76 catered chalets around Grenoble equipped every sleeping room and every stove location with the WANLIN-CO210 voice announcement build before the season opening. The strobe accessory covers the hearing-impaired guests flagged in the client database. The specification followed a flue blockage near miss the previous winter, with guests asleep in a loft under the flue run. The interconnect variant groups each chalet as one alarm chain. The installation was completed by two local technicians in 16 days. The manager reports one flue obstruction caught at the pre-alert stage on the first heavy-snow weekend, and the voice message wording is now rehearsed with staff in the season opening safety briefing.
Case 3: Thai poultry integrator measures weight recovery after brooder tuning. A poultry integrator in Lopburi fitted four broiler houses with the WANLIN-CO560 at bird height on RS485 Modbus RTU into the house controller, with the stage one threshold at 25 ppm driving the minimum ventilation position. The installation was specified after veterinary analysis suggested sub-clinical CO exposure was depressing weight gain in houses with older brooder regulators. In the first season the ppm logs identified two houses with regulators drifting rich, corrected at the next gas service, and the average bird weight in those houses recovered 3.1 percent against the previous cycle. The integrator has since ordered the CO560 for a further 14 houses, and the ppm curve now accompanies every flock closeout report to the company veterinarian.
Case 4: Jakarta colocation operator logs generator halls on 4G Modbus. A colocation operator in Jakarta equipped nine generator halls and the transfer switch rooms with the WANLIN-CO560 4G LTE Cat-1 Modbus variant, after the IT security policy segmented the facility network away from plant monitoring. The two relay stages drive the hall ventilation directly, tuned to a 30 ppm stage one after the first month of data showed technician entry during full load. The platform log attaches to the quarterly operations review. In the first year the ppm signature alone identified one generator with a cracked exhaust bellows, repaired before the annual load-bank test would have found it, at roughly a fifth of the cost of an in-service failure on a site where utility outages make the generators the primary afternoon supply.
Wanlin offers 3 partnership tiers for cross-border carbon monoxide alarm buyers, landlord portfolio operators, parking and facility operators, contractors and overseas cooperation partners:
| Tier | Annual Volume | Discount | Exclusivity | Support |
|---|---|---|---|---|
| Authorized Reseller | USD 30,000+ | 0% (list price) | No | Standard warranty per family |
| Regional Distributor | USD 100,000+ | 22% off list | Single country | Co-marketing USD 6,000/year, joint certification cost-share |
| Strategic OEM Partner | USD 320,000+ | 32% off list | Multi-country | Dedicated engineering team, joint roadmap, 18-month price lock |
All partners receive: free firmware updates for life of product, free DOA replacement within 60 days, dedicated account manager and response within 4 business hours, free certification documentation and test report copies, destination-language manual support, placement engineering guidance per project, integration assistance including MQTT topic structure and Modbus register maps for partners running their own servers, and one joint trade-show booth per year at Intersec Dubai, Security Essen, NFPA Conference, Firex International, Secutech, SICUR, FeuerTrutz, FireExpo or Canton Fair on a cost-share basis.
Wanlin Group 2026 carbon monoxide alarm export program is now open for global B2B buyers, regional distributors, housing associations and letting agents, senior living and student housing operators, hotel and hostel chains, parking and tunnel operators, marina and caravan dealers, HVAC contractors, facility management contractors, insurers, cross-border trading companies and OEM and ODM partners across 60+ destination markets. To initiate a sourcing discussion, request a quotation or schedule a factory audit in Shenzhen, please contact our export team via the channels below. Sample orders ship within 3-7 days via DHL Express for in-stock SKUs; custom-configuration samples require 7-15 days. Standard lead time for bulk OEM orders is 20-28 days. Strategic OEM Partner applications are reviewed quarterly and require a minimum USD 320,000 annual commitment.
We sincerely invite global safety equipment buyers, national importers, tender bidders, landlord portfolio managers, hotel and resort groups, parking and tunnel operators, marina, caravan and RV manufacturers, senior living and student housing operators, fuel forecourt and retail chains, system integrators and cross-border trading companies to engage in long-term cooperation with Wanlin Group as your China-based OEM and ODM partner, regional exclusive distributor or strategic global supplier under the Wanlin brand. Wanlin is the Chinese source factory behind 60+ country CO detection programmes, the SMT lines, cell calibration benches and CO test gas chambers behind every batch, and this 12-section export program. Let us protect every sleeper together.
Article signature:
working_principle: Hydrostatic pressure head measurement on a submersible probe, or non-contact ultrasonic time-of-flight for open tanks, converted to level and volume sensing_element: 316L submersible hydrostatic probe with a ceramic sensing diaphragm, or a 60 kHz ultrasonic transducer with temperature-compensated time of flight alarm_threshold: Two configurable level set points, default low-level alarm at 20% and high-level alarm at 95% of tank capacity accuracy_class: 0.5% FS hydrostatic and +/-0.25% of range ultrasonic, NIST-traceable calibration certificate issued per unit response_time: Level update every 1 s locally, radio report every 15 min nominal and within 5 s of any set-point breach power_supply: 3.6V ER34615 lithium cell, 3-year service life at a 15 min report interval, or 24V DC loop power on the wired variant power_consumption: 30 uA standby, 120 mA peak transmit output_signal: 4G LTE Cat-1 uplink with MQTT plus RS485 Modbus RTU, ultrasonic 0-10 m range for open tanks and reservoirs coverage_area: Ultrasonic measuring range 0-10 m with a 0.5 m dead band, up to 48 meters per gateway alarm_output: Local LCD level readout plus platform alert, SMS and pump-room annunciator relay output ip_rating: IP68 submersible probe, IP65 electronics housing operating_temp: -10 deg C to +60 deg C process, -10 deg C to +55 deg C ambient electronics humidity_range: 10-95% RH non-condensing, probe rated for permanent immersion housing_material: 316L stainless-steel probe body with a polycarbonate V-0 electronics housing and a PUR vented cable dimensions_weight: Probe 28 mm diameter x 132 mm length with a 10 m cable, 920 g net certifications: CE / EN 61326 / RoHS / REACH / FCC / NIST-traceable calibration / 4G LTE Cat-1 carrier acceptance