Global Partnership Invitation – 2-in-1 CO Smoke Detector Manufacturer China

2-in-1 CO Smoke Detector | Combined Carbon Monoxide Smoke Alarm | Dual CO and Smoke Sensor | Integrated Smoke and CO Tester | All-in-One Fire and Gas Detector

OEM/ODM | Custom Development | Factory Visit Welcome | Round-Trip Airfare Reimbursement | Free Accommodation and Meals

Are you a global trade partner, cross-border e-commerce seller, sourcing agent, or local distributor looking for a direct Chinese manufacturer of 2-in-1 CO smoke detectors?

Do you want to source combined carbon monoxide smoke alarms and dual CO and smoke sensors without dealing with trading company markups?

Wanlin Fire Technology – a verified manufacturer of home fire alarm and detection devices – is now expanding our international partner network. We specialize in combined fire and gas detection technology and are ready to become your long-term supplier.

We are not a middleman. We are the source factory. We offer complete export solutions for 2-in-1 CO smoke detectors, combined carbon monoxide smoke alarms, dual CO and smoke sensors, integrated smoke and CO testers, and all-in-one fire and gas detectors. Our philosophy is simple: win-win cooperation, quality assurance, and exceptional service for every global partner.

Our Core Product Line – 2-in-1 CO Smoke Detector Deepened

2-in-1 CO smoke detectors combine two critical life-safety technologies in a single device: photoelectric smoke detection for fire and electrochemical carbon monoxide sensing for gas poisoning prevention. One device protects against two leading causes of home fatalities: fire and the silent killer carbon monoxide. This saves installation space, reduces costs by 30-40 percent compared to buying separate devices, and simplifies maintenance with one test button and one battery. All products are designed to meet CE, RoHS, EN14604, EN50291, UL217, UL2034, UKCA, and RCM certifications.

1. 2-in-1 CO Smoke Detector

• Dual protection combining advanced photoelectric smoke sensing chamber and high-precision electrochemical CO sensor in one compact integrated housing

• Photoelectric smoke detection optimized for slow-smoldering fires from upholstery, bedding, foam materials, and electrical wiring insulation faults

• Electrochemical CO sensor providing accurate carbon monoxide detection from 0 to 999 parts per million with fast response under 60 seconds

• Distinct alarm patterns per hazard per international standards: three beeps with pause for smoke detection, four beeps with pause for carbon monoxide detection (UL2034 and EN50291 compliant)

• Voice alert option on premium models announces Smoke Detected or Carbon Monoxide Detected in clear natural voice for immediate unambiguous hazard identification

• Large backlit digital display (LCD) showing real-time CO concentration in parts per million, easily readable from across the room

• Peak level memory stores highest CO concentration detected since last reset for physician or emergency responder review

• Available configurations: 10-year sealed lithium battery (completely maintenance-free, tamper-proof), standard replaceable battery (AA, 9V, or CR123A), or hardwired 120V AC (US) or 230V AC (Europe) with battery backup

• Interconnectable version supports up to 24 units via wireless RF (433MHz, 868MHz for Europe, 915MHz for US/Australia) for whole-home synchronized alarming

• Single test button simultaneously verifies both smoke sensor sensitivity and CO sensor electrochemical function in one press

• Hush button silences nuisance smoke alarms for 8-10 minutes without affecting critical CO detection functionality

• Low battery warning with distinct chirp pattern for smoke and different pattern for CO sensor end-of-life

• End-of-life warning at 7-10 years (depending on model) for complete unit replacement with distinct chirp or voice announcement

• Operating temperature range: -10°C to +55°C (14°F to 131°F) with humidity tolerance up to 95 percent RH non-condensing

• Alarm memory LED indicates whether last alarm was smoke event or CO event (red for smoke, amber for CO)

• Tamper-resistant design with sealed 10-year battery option for rental property and public housing compliance

• Ideal for residential homes, apartments, condominiums, hotel rooms, RVs, campers, boats, and cabins

2. Combined Carbon Monoxide Smoke Alarm

• Complete combined alarm system with independent sensing elements for carbon monoxide and smoke operating in parallel

• Photoelectric smoke chamber with multi-layer insect screen protection and advanced dust rejection technology

• Electrochemical CO sensor with certified 5 to 7 year operational lifespan from Tier 1 ISO-certified suppliers (traceable documentation provided)

• Smart microprocessor with dedicated algorithm for each sensor, independent alarm decisions, no cross-interference

• Distinct audible and visual signals for each hazard type for immediate identification without confusion

• LED indicators: red flashing for smoke alarm, amber flashing for CO alarm, green steady for normal power, yellow flashing for fault or end-of-life

• Digital display with backlight shows current CO level (0-999 ppm) and peak memory with one-button reset

• Test and reset button with multi-function operation: single press tests both sensors, long press (3 seconds) silences alarm

• Low battery warning with distinct chirp pattern (once per minute) providing weeks of advance notice

• Tamper-resistant mounting bracket with security screws for rental property and public housing compliance (prevents unauthorized removal)

• Interconnect capable with other combination detectors via wireless RF for whole-home protection (up to 24 devices)

• UL217 (smoke) and UL2034 (CO) certified for United States market

• EN14604 (smoke) and EN50291 (CO) certified for European market

• Perfect for landlords, property managers (multi-unit portfolios), homeowners, and renters

3. Dual CO and Smoke Sensor Module

• OEM-friendly integrated sensor module combining photoelectric smoke detection and electrochemical CO sensing on single compact PCB

• Factory calibrated at our ISO-certified facility with individual calibration coefficients stored in onboard EEPROM accessible via digital interface

• Digital communication interfaces: I2C (standard), UART (3.3V or 5V), or PWM (pulse width modulation) for host system integration

• Ultra-low power consumption: typical 20 microamps in standby, 5mA during active measurement cycle

• Operating voltage options: 3.3V DC, 5V DC, or 12V DC to match your system requirements

• Real-time data output: smoke density (percent obscuration per foot) and CO concentration (parts per million)

• Self-diagnostics with fault reporting for sensor end-of-life, communication errors, and calibration drift

• Compact form factor: 50mm x 50mm x 15mm (2.0 x 2.0 x 0.6 inches) for easy OEM integration

• Ideal for smart home devices, HVAC air quality monitoring systems, industrial safety equipment, robotics, and custom fire alarm systems

• No external calibration required for 5+ years of operation (factory calibration permanent)

4. Integrated Smoke and CO Tester

• Professional grade testing tool specifically designed for 2-in-1 CO smoke detectors and combination alarms

• Dual-function aerosol simulates both smoke conditions for photoelectric chamber AND calibrated CO concentration for electrochemical sensor from single can

• Safe, non-residue, non-conductive, and non-flammable aerosol formula safe for all sensor types and electronic components

• Compatible with all major brands of combination detectors including Kidde, First Alert, Nest, Universal, and Wanlin

• Includes multiple silicone adapter attachments for different detector vent configurations and sensor access ports

• Clear pass-fail indication based on detector response time to each test (smoke response under 30 seconds, CO response under 60 seconds)

• Reusable can providing approximately 150 complete 2-in-1 tests (smoke plus CO) per can

• Essential tool for fire safety inspectors, HVAC technicians, property managers, maintenance professionals, and fire alarm service companies

• Also capable of testing individual smoke detectors and standalone CO detectors

5. All-in-One Fire and Gas Detector

• Comprehensive all-in-one detector protecting against multiple hazards in single compact device

• Detection technologies included as standard: photoelectric smoke + electrochemical CO

• Three-in-one premium configuration available adding natural gas (methane) or LPG (propane) semiconductor sensor

• Digital display cycling through readings from all active sensors (CO ppm, gas level, temperature)

• Mobile APP connectivity for remote monitoring and push notifications (select Wi-Fi and Bluetooth models)

• Power options: hardwired 120V/230V AC with battery backup, or battery-only (10-year sealed lithium)

• Voice alert announces specific hazard type: Fire Detected, Carbon Monoxide Detected, or Gas Leak Detected in clear natural voice

• Ideal for RVs, campers, travel trailers, boats, marine vessels, tiny homes, cabins, and off-grid applications where space is at a premium

• Also suitable for utility rooms, boiler rooms, mechanical spaces, garages, and workshops with multiple fuel-burning appliances

• Compact design fits in palm of hand, mounts on wall or ceiling

All products undergo 100 percent pre-shipment quality control including smoke sensitivity calibration using NIST-traceable reference smoke density equipment, CO sensor accuracy verification using certified gas concentrations at three points (50ppm, 150ppm, 400ppm), distinct alarm pattern testing (3-beep vs 4-beep verification), digital display function and accuracy verification, battery capacity and life validation through accelerated aging, environmental chamber testing across temperature and humidity ranges, and accelerated life testing equivalent to 10 years of operation. Multi-language user manuals available in English, Spanish, French, German, Italian, Portuguese, Polish, Russian, Arabic, Chinese, Japanese, Korean, and more.

Technical Advantages of 2-in-1 CO Smoke Detection Technology

Why Combine Smoke and CO Detection? Smoke detectors save lives from fire. Carbon monoxide detectors save lives from invisible, odorless, tasteless, gas poisoning. Industry statistics from NFPA and CDC show that many homes have neither type, or have only one type installed while missing the other. A 2-in-1 detector provides complete protection in a single device, reducing cost by 30-40 percent, eliminating one installation step, and reducing maintenance requirements while eliminating the risk of forgetting to install one type of protection.

Smoke Detection Technology – Photoelectric Chamber

• Uses light-scattering principle with precision infrared LED emitter (940nm) and matched photosensitive receiver in darkened optical chamber

• Chamber design engineered to block ambient light while allowing smoke particle entry through optimized vents

• Best for slow-smoldering fires from upholstery, bedding, foam, mattresses, electrical wiring insulation, and overheated electronics

• Lower false alarm rate from normal cooking activities than alternative ionization technology

• Detects visible smoke particles typically above 0.3 microns in diameter

• Insect screen protection with optimized 0.5mm holes prevents false alarms from small insect ingress

• Automatic drift compensation maintains consistent sensitivity over detector lifespan

• Meets or exceeds UL217 8th edition and EN14604:2005+AC:2008 standards

Carbon Monoxide Detection Technology – Electrochemical Sensor

• Three-electrode electrochemical sensor design comprising working electrode, counter electrode, and reference electrode suspended in aqueous electrolyte

• Gas-permeable membrane (hydrophobic PTFE) allows carbon monoxide to diffuse into sensor while blocking liquids and particulates

• Chemical oxidation reaction at working electrode generates electrical current precisely proportional to CO concentration

• Current is measured by precision electronics and converted to parts per million reading by microprocessor

• Reference electrode compensates for temperature variations and background gas interference

• Highly selective to carbon monoxide with minimal cross-sensitivity to other gases including hydrogen, methane, or alcohol vapors

• High measurement accuracy across full range from 0 to 999 ppm CO (±5 percent of reading or ±5ppm typical)

• Fast response time typically within 30 to 60 seconds of CO exposure (T90)

• Ultra-low power consumption ideally suited for battery-powered operation (under 50 microamps standby)

• Typical sensor lifespan of 5 to 7 years with stable performance throughout (certified lifespan documentation provided)

• Meets or exceeds UL2034 3rd Edition and EN50291-1:2018 standards

Benefits of 2-in-1 Combination Detectors for Homeowners and Property Managers

• Single installation location: one device instead of two on ceiling or wall (saves time, fewer holes)

• Lower total cost than purchasing separate smoke detector and CO detector individually (30-40 percent savings)

• Reduced maintenance burden: one battery to replace (or none with 10-year sealed), one test button to press (tests both sensors), one end-of-life replacement date to track

• Saves valuable ceiling or wall space in small rooms, hallways, apartments, RVs, boats, and tiny homes

• Simplified compliance with safety codes and insurance requirements requiring both smoke and CO protection

• Distinct alarm patterns eliminate confusion about which hazard triggered the alarm for proper response

• Consumer convenience: one product to research, purchase, and install for complete protection

CO Alarm Activation Levels per UL2034 Standard

• 30 parts per million: Alarm must activate within 30 days (low level persistent warning)

• 70 parts per million: Alarm must activate within 60 to 240 minutes (moderate level)

• 150 parts per million: Alarm must activate within 10 to 50 minutes (high level)

• 400 parts per million: Alarm must activate within 4 to 15 minutes (dangerous level)

Wanlin's 2-in-1 CO smoke detectors use premium photoelectric smoke chambers with patented insect protection and high-quality electrochemical CO sensors from Tier 1 ISO-certified suppliers (Honeywell, Figaro, or equivalent). Each unit undergoes individual smoke sensitivity calibration and CO sensor functional verification with certified gas before shipment, with calibration records maintained for batch traceability.

Custom Development and OEM/ODM – Your Brand, Your Specifications

We understand that every market has unique requirements. Wanlin offers full customization for all our 2-in-1 CO smoke detection products from housing to sensor configuration to software.

Housing and Industrial Design

• Custom colors according to any RAL color code or Pantone Matching System number (standard white RAL 9010, also ivory, silver, black, beige, custom)

• Logo engraving, embossing, or precision silk-screening on front cover and base plate

• Button placement, shape, size, tactile feel, and color customization for user experience

• LED indicator color selection: power (green), smoke alarm (red), CO alarm (amber), fault (yellow), test (blue), interconnect (white)

• Digital display customization options: CO level only (0-999 ppm), CO plus temperature (°C or °F), CO plus time of day, or no display for basic economy models

• Low-profile and ultra-slim designs (under 38mm height / 1.5 inches) for aesthetic residential applications

• Tamper-resistant designs with security screws for rental property and public housing compliance

• Weather-resistant housing (IP42, IP54, or IP65 rating) for outdoor covered, marine, or garage installations

Sensor Configuration Options

• Photoelectric smoke chamber: standard residential sensitivity (1.5-2.0 percent obscuration/ft) or high-sensitivity for early warning (0.5-1.0 percent obscuration/ft)

• Electrochemical CO sensor: 5-year standard lifespan, 7-year premium lifespan, or 10-year certified versions (with documentation)

• Additional integrated sensors for premium models: thermistor temperature monitoring (-20°C to +70°C), humidity sensor (0-100 percent RH), natural gas methane (500-10,000 ppm), or LPG propane (100-10,000 ppm)

• Voice alert language and phrasing customization: English (US or UK accent), Spanish, French, German, Italian, Portuguese, Arabic, Chinese, Japanese, Korean, Russian, Polish (custom voice talent available)

Power Options

• 10-year sealed lithium battery (UL, CE, EN, UKCA, RCM certified) – completely maintenance-free, tamper-proof, ideal for rental compliance

• 5-year sealed lithium battery (lower cost, shorter lifespan) for budget applications

• Replaceable battery compartment: AA alkaline (2x, 1-2 years life), AA lithium (2x, 3-5 years), 9V lithium (2-3 years), CR123A lithium (2x, 2-3 years)

• Hardwired with battery backup: 120V AC 60Hz (US/Canada) or 230V AC 50Hz (Europe/UK/Australia) with 9V or AA backup battery

• Low voltage DC options: 12V DC, 24V DC for professional security system integration

Display and User Interface Options

• Digital CO display (3-digit 7-segment or LCD) showing 0-999 ppm with backlight (white, blue, green, amber options)

• Peak level memory with dedicated reset button (stores highest CO concentration)

• Temperature display in Celsius or Fahrenheit selectable (optional)

• Voice alert with clear hazard identification (Smoke Detected, Carbon Monoxide Detected)

• Alarm memory LED indicating which hazard triggered last event (red for smoke, amber for CO)

• Buzzer volume adjustment options (75dB to 100dB in multiple steps)

Wireless and Smart Features

• RF interconnect for whole-home synchronization: frequencies 433MHz (global), 868MHz (Europe), 915MHz (US, Australia, Canada); supports up to 24, 32, or 50 devices

• Wi-Fi 2.4GHz 802.11 b/g/n for remote monitoring, push notifications, and cloud platform integration

• Zigbee 3.0 for universal smart home hub compatibility (Hubitat, SmartThings, Amazon Echo Plus)

• Z-Wave Plus 700 series for professional security system integration

• Thread and Matter for future-proof smart home compatibility

• Bluetooth 5.0 BLE for local configuration and firmware updates

• Mobile APP for iOS and Android (white-label available with your branding)

• Cloud platform for remote monitoring (white-label available with your domain)

Packaging and Labeling

• Retail box design with your branding, product photography, and 2-in-1 dual protection feature highlights

• Blister packs, polybags, eco-friendly cardboard, or premium clamshell packaging options

• Custom labels with serial number, batch tracking, QR code linking to installation video, regulatory marks (UL, CE, EN, UKCA, RCM), and barcodes

• Multi-language user manuals with complete safety information, installation guide, CO safety information, and maintenance instructions – we translate and design professionally

• Quick start card for 5-minute installation without reading full manual

• Professional bulk packaging for distributor, property manager, and wholesale channels (10, 20, 50, or 100 units per master case)

Certification Support

• United States: UL217 8th Edition (smoke detection), UL2034 3rd Edition (CO detection), FCC Part 15B (wireless), RoHS

• Europe: EN14604:2005+AC:2008 (smoke), EN50291-1:2018 (CO), CE-RED (wireless), RoHS, REACH

• Canada: ULC-S531 (smoke), CSA 6.19 (CO), IC (wireless)

• United Kingdom: UKCA equivalents to CE with UK marking

• Australia/New Zealand: AS3786 (smoke), AS/RCM (CO), RCM (wireless)

• International: CE, RoHS, FCC, IC, RCM, UKCA

Low MOQ for Trial Orders – as few as 500 units for selected models
Fast Sampling – 10 to 15 working days for custom samples including custom color and logo
White-Label APP – 4 to 6 weeks for branded mobile application (iOS and Android)
Full Technical Documentation – for product registration, market approval, and insurance compliance
Dedicated R&D Support – for custom sensor configurations, voice alert development, and wireless integration

Visit Our Factory – We Reimburse Your Airfare and Provide Free Stay

We believe the best partnership is built on trust – and trust is built face to face.

For serious global partners including distributors, importers, sourcing agents, OEM customers, property management companies, and volume buyers, Wanlin offers:

• Round-trip airfare reimbursement – economy class tickets, upon confirmed order or signed partnership agreement

• Free accommodation – quality hotel stay during factory inspection days for up to 3 nights

• Free local meals and transportation – airport pickup, all meals during business days, and local travel during your visit

During your visit, you will:

• Tour our production lines and witness 2-in-1 detector assembly, dual-sensor calibration, and quality testing processes

• See our CO sensor testing laboratory with certified gas concentration equipment (50ppm, 150ppm, 400ppm CO calibration station)

• Visit our smoke sensitivity calibration chambers with NIST-traceable reference smoke density equipment

• Test our combined detectors with real smoke (test aerosol) and certified CO gas in live side-by-side demonstration

• Hear distinct alarm patterns for smoke (3 beeps) versus CO (4 beeps)

• Examine digital display showing real-time CO concentration and peak level memory

• Review voice alert options in multiple languages (hear samples)

• Meet our R&D engineers and discuss custom sensor configurations, voice alert phrasing, and wireless integration

• Review export documentation, supply chain processes, and quality assurance protocols in detail

• Visit our warehouse and see finished goods ready for shipment to global destinations

• Discuss long-term partnership agreements, exclusive territory arrangements, and OEM customization options

• Review UL, EN, CE, and other certification test reports and documentation

This offer applies to genuine buyers, distributors, and long-term cooperation seekers. Contact us for eligibility details and complete terms.

Our Global Partnership Model – Win-Win, Quality First

Wanlin is committed to cooperative success. We do not chase short-term profits. We build long-term relationships based on quality, service, and mutual growth.

Partner Type	What We Offer
Fire Safety Distributor	Bulk pricing with tiered volume discounts (500, 1000, 2500, 5000, 10000+ units), container shipping options including FCL 20ft (approx. 25,000-35,000 units) or 40ft (50,000-70,000 units) and LCL consolidation, exclusive territory discussion with protected regions, stock holding support with consignment options, marketing materials highlighting 2-in-1 convenience and 30-40 percent cost savings, demo units for showroom and trade shows
Hardware and DIY Store Supplier	Retail-ready packaging with clear 2-in-1 messaging (FIRE + CO protection in one device), display units for shelf placement, consumer-friendly instructions, competitive wholesale pricing, co-op marketing opportunities
Cross-border Seller (Amazon, eBay, Shopify, Walmart, Allegro, Coupang)	Private label service with your brand on product and packaging, FBA-ready packaging with polybags and barcode labels, GS1 barcode support, complete compliance documentation package including test reports (UL/CE/EN), enhanced listing content and A+ content explaining 2-in-1 benefits and cost savings
Property Management Supplier	10-year sealed battery combination detectors for rental property compliance across multi-unit portfolios, tamper-resistant designs prevent tenant disablement (no battery removal), no battery change service calls (eliminates maintenance), bulk pricing for portfolios of 100+ units, fleet management dashboard for remote monitoring (with gateway)
OEM Customer for Sensor Modules	Factory-calibrated dual smoke-CO sensor modules with digital output (I2C/UART) and individual calibration certificates, custom communication protocol development, long-term supply agreement with pricing stability, technical integration support with documentation, NDA and exclusivity options
RV, Marine, and Outdoor Supplier	Compact 2-in-1 detectors for RVs, campers, travel trailers, boats, yachts, and marine vessels, vibration-resistant construction, 12V DC power option, space-saving form factor (ultra-slim), weather-resistant housing (IP54/IP65), 10-year battery option for off-grid use
Government Tender or NGO Supplier	Volume pricing for large-scale public safety programs, housing authorities (public housing), school districts, and emergency preparedness initiatives, complete certification packages (UL/CE/EN/UKCA) for public sector compliance, drop-shipping to multiple warehouse locations, compliance documentation for public safety tenders
Sourcing Agent or Trading Company	Factory-direct pricing without middleman markups, commission protection agreement with written terms, sample access within 3 to 5 business days, 24-hour reply guarantee, dedicated English-speaking account manager with regular updates

Our Values

• Quality Guarantee – 100 percent pre-shipment inspection, smoke sensitivity calibration on every unit using NIST-traceable reference equipment, CO sensor accuracy verification on batch samples using certified gas concentrations (50ppm, 150ppm, 400ppm) with documented results, distinct alarm pattern verification (3-beep vs 4-beep) on every unit, digital display function verification on every unit, battery capacity and voltage verification on all battery-powered units, environmental chamber testing including temperature and humidity on batch samples, accelerated life testing equivalent to 10 years on production samples, 1-year warranty with replacement guarantee, extended warranty options available (3, 5, 10 years)

• Responsive Service – English-speaking export team available during Asian and European business hours, reply within 24 hours (typically within 12 hours), technical support for installation, troubleshooting, CO safety questions, and certification inquiries

• Fair Pricing – No hidden fees or unexpected charges, transparent cost breakdown including sensors, electronics, battery, labor, calibration, certification, and packaging, volume discounts automatically applied based on annual commitment, contract pricing for long-term agreements

• Shared Growth – Marketing materials including high-resolution product photos, product catalogs with specification sheets, technical white papers on 2-in-1 detection technology and CO safety, installation videos, FAQs, and documentation provided free of charge

• Long-term Commitment – We treat every partner as part of the Wanlin family with regular communication, quarterly business reviews, annual joint planning sessions, and continuous product improvement based on market feedback

Complete Export Solution – From Our Factory to Your Warehouse

When you partner with Wanlin, you get a turnkey export service designed for hassle-free international trade.

Customization and Branding

• Custom labeling and retail packaging – your brand logo, your design, your language

• Custom user manuals with complete combined detector operation instructions, CO safety information, installation guide, and maintenance instructions – we translate and design professionally

• Custom retail box design with your product photography and 2-in-1 dual protection feature highlights

• Sample approval before mass production with photo, video, physical sample, and documentation verification

Quality Control

• In-line quality control during production at each assembly stage including component verification, PCB assembly inspection, soldering quality check, and sub-assembly testing

• Smoke sensitivity calibration on 100 percent of finished units using NIST-traceable reference smoke density equipment

• CO sensor accuracy verification on batch samples using certified gas concentrations (50ppm, 150ppm, 400ppm) with documented results (calibration certificates provided)

• Distinct alarm pattern verification (smoke: 3 beeps with 1.5 second pause, CO: 4 beeps with 5 second pause) on every unit using calibrated acoustic measurement

• Digital display function verification on all display-equipped units (segments, backlight, accuracy)

• Battery capacity and voltage verification on all battery-powered units

• Voice alert verification on voice-equipped models (clarity, volume, language accuracy)

• Environmental chamber testing including temperature from -10°C to +55°C and humidity up to 95 percent RH on batch samples

• Accelerated life testing equivalent to 10 years of operation on production batch samples

• 100 percent final functional testing including smoke response (simulated test aerosol), CO response (simulated test gas), alarm sound, LED indicators, button function, and display before packaging

• Third-party inspection supported including SGS, BV, TUV, Intertek, UL, and any accredited inspection agency at your request

Shipping and Logistics

• Full shipping documents provided: Commercial Invoice, Packing List, Bill of Lading or Air Waybill, Certificate of Origin, Form E for preferential tariffs, CE/UL/EN declarations of conformity, CO sensor calibration documentation, battery MSDS and UN38.3 test reports for air transport (if batteries included), and radio certification documents for wireless models (FCC, CE-RED, IC, RCM)

• Flexible shipping options: sea freight including FCL 20ft (approx. 25,000-35,000 units) or 40ft (50,000-70,000 units) containers and LCL consolidation for smaller orders, air freight for urgent time-sensitive orders, express shipping via DHL, FedEx, UPS, or TNT for samples and small orders

• DDP (Delivered Duty Paid) available for select countries including United States, Germany, France, United Kingdom, Australia, Canada, Netherlands, Spain, Italy, and more – we handle all customs clearance, duty payments, and final delivery to your warehouse

After-Sales Support

• Technical hotline for installation assistance, troubleshooting, and CO safety questions

• CO sensor lifespan guidance and replacement scheduling support (5-7 year lifespan tracking)

• Battery replacement guidance for replaceable battery models

• Spare parts supply guaranteed for 3 years after last order date including sensors, batteries, and mounting brackets

• Warranty returns processing with local return or replacement options to minimize shipping costs

• Online training sessions for your sales team and technical installers conducted via Zoom, Teams, or WebEx with recorded sessions provided

We have successfully exported to North America, Europe, Southeast Asia, the Middle East, South America, Africa, and Australia. Our export team has experience with customs requirements, import regulations, and documentation standards in over 60 countries.

Carbon Monoxide Safety Information for Your Customers

Why CO Detection is Critical for Every Home with 2-in-1 Detectors

• Carbon monoxide is invisible, odorless, tasteless, and non-irritating – impossible to detect without a functioning electrochemical sensor

• Over 50,000 emergency room visits annually for carbon monoxide poisoning in the United States alone (CDC data)

• Over 400 preventable deaths annually from accidental CO poisoning in US residential settings

• Thousands more suffer permanent neurological damage from non-fatal CO exposure

• Early symptoms mimic common flu or food poisoning: headache, dizziness, nausea, vomiting, confusion, fatigue, chest pain, shortness of breath

• High concentration exposure (400+ ppm) can cause loss of consciousness and death within minutes

• Low concentration exposure over hours or days causes cumulative health damage

• Carbon monoxide poisoning is entirely preventable with proper detection equipment

Common Carbon Monoxide Sources in Homes

• Gas furnaces and boilers (most common source, especially with cracked heat exchangers)

• Gas water heaters (especially older units or those with incomplete combustion)

• Gas stoves, ovens, and cooktops

• Fireplaces (wood burning or gas, especially with blocked or cracked chimneys)

• Portable generators operated indoors, in garages, or too close to windows/doors/vents

• Vehicles running in attached garages (CO migrates into living spaces even with garage door open)

• Charcoal grills used indoors, in garages, or on covered patios (never use indoors)

• Space heaters (gas, kerosene, or propane)

• Clothes dryers (gas models)

• Cigarette smoke in enclosed spaces

• Blocked, cracked, or corroded chimneys and flues

Where to Install 2-in-1 CO Smoke Detectors for Maximum Protection

• Near sleeping areas, within 10 feet (3 meters) of each bedroom door for waking effectiveness

• On every level of the home including basement, ground floor, and upper levels

• Near attached garages (CO hazard from vehicle exhaust, but not inside garage)

• In rooms with fuel-burning appliances including furnaces, water heaters, gas stoves, fireplaces, space heaters

• At least 5 feet (1.5 meters) above floor level (CO is slightly lighter than air but mixes well)

• In RVs, campers, travel trailers, and motorhomes

• In boats and marine vessels with fuel-burning engines or generators

Where NOT to Install

• Within 5 feet (1.5 meters) of cooking appliances (normal cooking can cause nuisance smoke alarms)

• Inside attached garages (vehicle exhaust will cause frequent false CO alarms)

• In direct sunlight or within 3 feet of HVAC supply vents or return air grilles

• In areas with temperature consistently below -10°C (14°F) or above 55°C (131°F)

• In extremely dusty, greasy, or high-humidity environments (over 95 percent RH)

• In dead air spaces such as corners of rooms or behind furniture

Warning Signs of Carbon Monoxide Poisoning

• Low level (1-70 ppm over days): Mild headache, nausea, fatigue, flu-like symptoms (often mistaken for flu or food poisoning)

• Medium level (70-150 ppm): Throbbing headache, drowsiness, confusion, rapid heart rate, shortness of breath

• High level (150-400+ ppm): Seizures, loss of consciousness, cardiac arrest, permanent brain damage, death

• If CO alarm sounds AND any occupant feels any symptoms: evacuate immediately, call emergency services (911) from outside, do not re-enter until declared safe by responders

• If CO alarm sounds but no occupants feel symptoms: still evacuate, call emergency services, have all fuel-burning appliances inspected by qualified technician before re-entry

Comparison Guide – 2-in-1 Detector vs Separate Devices

Feature	Separate Smoke Detector + Separate CO Detector	2-in-1 CO Smoke Detector by Wanlin
Number of devices needed per location	2 separate devices	1 single integrated device
Installation cost and effort	Higher (two mounts, two installations, two sets of screws)	Lower (one mount, one installation)
Total product purchase cost	Higher (two individual products)	Lower (one combined product, 30-40 percent cost savings)
Ceiling or wall space required	Twice as much space	Half as much space
Battery replacements to track	2 separate batteries on different schedules	1 battery, single schedule
Test button operations	2 separate tests at different locations	1 test button tests both sensors simultaneously
End-of-life replacement	2 different devices at different times (track two dates)	Single device with one replacement date
Distinct alarm patterns	Different patterns but on separate devices (may confuse)	Different patterns clearly identified on one device
Aesthetic impact on room	Two visible devices on ceiling or wall	One visible device on ceiling or wall
Compliance simplicity	Must verify both types present and functional	One device covers both safety requirements
Consumer confusion risk	May install only one type or forget the other	Complete protection automatically
Maintenance checklist items	Two items to track (smoke + CO)	One item to track
Ideal application	Large rooms with abundant ceiling space	Small rooms, RVs, boats, apartments, tiny homes, complete whole-home protection

Join Us as a Global Partner Today

You do not need to be the biggest company. You just need a reliable, honest, and capable manufacturer who treats you as a true partner.

Email: wanlinfirecontrol@163.com
Export Hotline (WhatsApp, WeChat, Phone): +86 13261677119
Official Website: www.wanlinfire.com