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. This saves installation space, reduces costs, and simplifies maintenance. 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 housing

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

• 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: three beeps with pause for smoke detection, four beeps with pause for carbon monoxide detection (UL2034/EN50291 standard)

• Voice alert option on premium models announces Smoke Detected or Carbon Monoxide Detected for immediate hazard identification

• Large backlit digital display showing real-time CO concentration in parts per million

• Peak level memory stores highest CO concentration for physician or emergency responder review

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

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

• Test button simultaneously verifies both smoke sensor sensitivity and CO sensor electrochemical function

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

• 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 for complete unit replacement

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

• Alarm memory indicates whether last alarm was smoke or CO event

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

2. Combined Carbon Monoxide Smoke Alarm

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

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

• Electrochemical CO sensor with certified 5 to 7 year operational lifespan from Tier 1 ISO-certified suppliers

• Smart microprocessor with dedicated algorithm for each sensor, independent alarm decisions

• Distinct audible and visual signals for each hazard type for immediate identification

• LED indicators: red flashing for smoke alarm, amber flashing for CO alarm, green steady for power

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

• Test/reset button with multi-function operation: single press tests both sensors, long press silences

• Low battery warning: distinct chirp pattern with weeks of advance notice

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

• Interconnect capable with other combination detectors for whole-home protection

• UL217 (smoke) and UL2034 (CO) certified for US market

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

• Perfect for landlords, property managers, homeowners, and renters

3. Dual CO and Smoke Sensor

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

• Factory calibrated with individual calibration coefficients stored in onboard EEPROM

• Digital communication interfaces: I2C, UART, or PWM for host system integration

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

• Operating voltage: 3.3V DC, 5V DC, or 12V DC options

• Real-time data output: smoke density (percent obscuration) and CO concentration (ppm)

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

• Compact form factor: 50mm x 50mm x 15mm for OEM integration

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

• No external calibration required for 5+ years

4. Integrated Smoke and CO Tester

• Professional testing tool specifically for 2-in-1 CO smoke detectors

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

• Safe, non-residue, non-conductive, non-flammable formula safe for all sensor types

• Compatible with all major brands of combination detectors (Kidde, First Alert, Nest, Wanlin)

• Includes adapter attachments for different detector vent configurations

• Clear pass-fail indication based on detector response time to each test

• Reusable can providing approximately 150 complete 2-in-1 tests

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

• Also tests 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 device

• Detection technologies included: photoelectric smoke + electrochemical CO + optional natural gas (methane) or LPG (propane)

• Three-in-one configuration available: smoke, CO, and natural gas detection

• Digital display cycling through readings from all active sensors

• Mobile APP connectivity for remote monitoring (select Wi-Fi models)

• Hardwired or battery powered options

• Voice alert announces specific hazard type: Fire, Carbon Monoxide, or Gas Leak

• Ideal for RVs, boats, cabins, tiny homes, and off-grid applications where space is limited

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

All products undergo 100 percent pre-shipment quality control including smoke sensitivity calibration using NIST-traceable reference equipment, CO sensor accuracy verification using certified gas concentrations (50ppm, 150ppm, 400ppm), distinct alarm pattern testing, digital display verification, battery life validation, environmental chamber testing, and accelerated life testing. Multi-language user manuals available.

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 show that many homes have neither type, or have only one type installed. A 2-in-1 detector provides complete protection in a single device, reducing cost, installation effort, and maintenance requirements while eliminating the risk of forgetting to install one type.

Smoke Detection Technology – Photoelectric Chamber

• Uses light-scattering principle with infrared LED emitter and photosensitive receiver in darkened optical chamber

• 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 prevents false alarms from small insect ingress

• Automatic drift compensation maintains consistent sensitivity over detector lifespan

• Meets or exceeds UL217 8th edition and EN14604 standards

Carbon Monoxide Detection Technology – Electrochemical Sensor

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

• Gas-permeable membrane allows carbon monoxide to diffuse into sensor while blocking liquids

• Chemical reaction generates electrical current precisely proportional to CO concentration

• High accuracy across full range from 0 to 999 ppm CO

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

• Highly selective with minimal cross-sensitivity to other gases including hydrogen or methane

• Ultra-low power consumption ideally suited for battery-powered operation

• Typical sensor lifespan of 5 to 7 years with stable performance

• Meets or exceeds UL2034 and EN50291 standards

Benefits of 2-in-1 Combination Detectors

• Single installation location: one device instead of two on ceiling or wall

• Lower total cost than purchasing separate smoke detector and CO detector individually

• Reduced maintenance: one battery to replace, one test button to press, one end-of-life replacement date

• Saves ceiling/wall space in small rooms, hallways, apartments, RVs, boats

• Simplified code compliance: many jurisdictions require both smoke and CO protection

• Distinct alarm patterns eliminate confusion about which hazard triggered the alarm

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

CO Alarm Activation Levels per UL2034 Standard

• 30 ppm: Alarm within 30 days (low level persistent warning)

• 70 ppm: Alarm within 60 to 240 minutes (moderate level)

• 150 ppm: Alarm within 10 to 50 minutes (high level)

• 400 ppm: Alarm within 4 to 15 minutes (dangerous level)

Wanlin's 2-in-1 CO smoke detectors use premium photoelectric smoke chambers and high-quality electrochemical CO sensors from Tier 1 ISO-certified suppliers. Each unit undergoes individual smoke sensitivity calibration and CO sensor verification before shipment.

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.

Housing and Design

• Custom colors according to any RAL or Pantone code

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

• Button placement, shape, size, and tactile feel customization

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

• Digital display customization: CO level only, CO plus temperature, or no display for basic models

• Low-profile designs (under 40mm height) for aesthetic residential applications

• Tamper-resistant designs with security screws for rental properties

• Weather-resistant housing for outdoor covered or marine applications

Sensor Configuration Options

• Photoelectric smoke chamber: standard residential sensitivity or high-sensitivity for early warning

• Electrochemical CO sensor: 5-year standard, 7-year premium, or 10-year certified lifespan

• Additional sensors: temperature monitoring, humidity, natural gas (methane), or LPG (propane)

• Voice alert language and phrasing customization (English, Spanish, French, German, etc.)

Power Options

• 10-year sealed lithium battery (UL/CE/EN certified) – maintenance-free, tamper-proof

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

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

• Hardwired with battery backup: 120V AC (US) or 230V AC (Europe) with 9V or AA backup

• Low voltage DC: 12V or 24V for professional system integration

Display and User Interface

• Digital CO display (0-999 ppm) with backlight (white, blue, green options)

• Peak level memory with reset button

• Temperature display in Celsius or Fahrenheit (optional)

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

• Alarm memory LED indicating which hazard triggered last event

Wireless and Smart Features

• RF interconnect (433MHz, 868MHz, 915MHz) for whole-home synchronization (up to 24 devices)

• Wi-Fi 2.4GHz for remote monitoring and push notifications (select models)

• Zigbee, Z-Wave, or Thread for smart home integration

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

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

Packaging and Labeling

• Retail box design with your branding and 2-in-1 protection features

• Custom labels with serial number, batch tracking, QR code, and regulatory marks

• Multi-language user manuals with complete safety information

• Professional packaging for wholesale distribution

Certification Support

• United States: UL217 (smoke) and UL2034 (CO)

• Europe: EN14604 (smoke) and EN50291 (CO)

• Canada: ULC-S531 (smoke) and CSA 6.19 (CO)

• United Kingdom: UKCA equivalents

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

• Radio certifications: FCC (US), CE-RED (Europe), IC (Canada), RCM (Australia)

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
Full Technical Documentation – for product registration and market approval
Dedicated R&D Support – for custom sensor configurations 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, 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, 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

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

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

• Test our combined detectors with real smoke and CO gas in live demonstration

• Review distinct alarm patterns for smoke versus CO

• Examine digital display and peak level memory functions

• Meet our R&D engineers and discuss custom sensor configurations and voice alert options

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

• Visit our warehouse and see finished goods ready for shipment

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

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, container shipping options (FCL 20ft/40ft, LCL), exclusive territory discussion, stock holding support, marketing materials highlighting 2-in-1 convenience and cost savings, demo units for showroom
Hardware and DIY Store Supplier	Retail-ready packaging with clear 2-in-1 messaging, display units for shelf placement, consumer-friendly instructions, competitive wholesale pricing
Cross-border Seller (Amazon, eBay, Shopify, Walmart)	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, enhanced listing content explaining 2-in-1 benefits
Property Management Supplier	10-year sealed battery combination detectors for rental compliance, tamper-resistant designs prevent tenant disablement, no battery change service calls, bulk pricing for portfolios
OEM Customer for Sensor Modules	Factory-calibrated dual smoke-CO sensor modules with digital output, custom communication protocol development, long-term supply agreement, technical integration support, NDA and exclusivity options
RV and Marine Supplier	Compact 2-in-1 detectors for RVs, campers, boats, and marine vessels, vibration-resistant designs, 12V DC power option, space-saving form factor
Government Tender or NGO Supplier	Volume pricing for large-scale public safety programs, housing authorities, school districts, complete certification packages, drop-shipping to multiple locations
Sourcing Agent or Trading Company	Factory-direct pricing without middleman markups, commission protection, sample access within 3-5 business days, 24-hour reply guarantee, dedicated account manager

Our Values

• Quality Guarantee – 100 percent pre-shipment inspection, smoke sensitivity calibration on every unit, CO sensor accuracy verification on batch samples, distinct alarm pattern testing, digital display verification, battery life validation, environmental chamber testing, accelerated life testing, 1-year warranty with replacement guarantee

• 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, and certification questions

• Fair Pricing – No hidden fees or unexpected charges, transparent cost breakdown, volume discounts automatically applied based on annual commitment

• Shared Growth – Marketing materials including high-resolution product photos, product catalogs with specification sheets, technical white papers on 2-in-1 detection technology, 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

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, your design, your language

• Custom user manuals with combined detector operation instructions and CO safety information – we translate and design professionally

• Custom retail box design with your product photography and 2-in-1 protection features

• 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, soldering inspection, and sub-assembly testing

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

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

• Distinct alarm pattern verification (smoke: 3 beeps, CO: 4 beeps) on every unit

• Digital display function verification on all display-equipped units

• 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 of operation on production batch samples

• 100 percent final functional testing before packaging

• Third-party inspection supported including SGS, BV, TUV, Intertek, UL

Shipping and Logistics

• Full shipping documents provided: Commercial Invoice, Packing List, Bill of Lading or Air Waybill, Certificate of Origin, Form E, CE/UL/EN declarations, CO sensor calibration documentation, battery MSDS and UN38.3 test reports

• 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, air freight for urgent orders, express shipping via DHL, FedEx, UPS, TNT

• DDP (Delivered Duty Paid) available for select countries including United States, Germany, France, United Kingdom, Australia, Canada, Netherlands, Spain, Italy

After-Sales Support

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

• CO sensor lifespan guidance and replacement scheduling support

• Battery replacement guidance for replaceable models

• Spare parts supply guaranteed for 3 years after last order date

• Warranty returns processing with local return or replacement options

• Online training sessions for your sales team and technical installers

We have successfully exported to North America, Europe, Southeast Asia, the Middle East, South America, Africa, and Australia.

Carbon Monoxide Safety Information for Your Customers

Why CO Detection is Critical for Every Home

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

• Over 50,000 emergency room visits annually for CO poisoning in the United States alone

• Hundreds of preventable deaths annually from accidental CO poisoning in residential settings

• Early symptoms mimic common flu: headache, dizziness, nausea, vomiting, confusion, fatigue, chest pain

• High concentration exposure can cause loss of consciousness and death within minutes

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

Common CO Sources in Homes

• Gas furnaces and boilers (most common source)

• Gas water heaters

• Gas stoves and ovens

• Fireplaces (wood burning or gas)

• Portable generators operated indoors or too close to windows

• Vehicles running in attached garages

• Charcoal grills used indoors or in garages

• Space heaters (gas, kerosene, or propane)

Where to Install 2-in-1 CO Smoke Detectors

• Near sleeping areas, within 10 feet of each bedroom door

• On every level of the home including basement

• Near attached garages (CO hazard from vehicles)

• In rooms with fuel-burning appliances

• At least 5 feet above floor (CO is slightly lighter than air)

• In RVs, boats, and cabins

Where NOT to Install

• Within 5 feet of cooking appliances

• Inside attached garages (vehicle exhaust causes false alarms)

• In direct sunlight or near HVAC vents

• In areas with temperature extremes or high humidity

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 device
Installation cost	Higher (two mounts, two installations)	Lower (one mount, one installation)
Total product cost	Higher (two individual products)	Lower (one combined product, 30-40 percent savings)
Ceiling or wall space used	Twice as much space required	Half as much space required
Battery replacements	Two separate batteries, different schedules	One battery, single schedule
Test button operations	Two separate tests at different locations	One test button tests both sensors together
End-of-life replacement	Two different devices at different times	Single device with one replacement date
Distinct alarm patterns	Different patterns but on separate devices	Different patterns clearly identified on one device
Aesthetic impact on room	Two visible devices on ceiling	One visible device on ceiling
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 one	Complete protection automatically
Maintenance checklist items	Two items to track	One item to track
Best application	Large rooms with abundant ceiling space	Small rooms, RVs, boats, apartments, 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