Global Partnership Invitation – Combined Smoke and CO Detector Manufacturer China

Combined Smoke and CO Detector | Smoke and Carbon Monoxide Alarm | Dual Smoke-CO Sensor | Integrated Smoke and CO Tester | Multi-Gas Fire Safety 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 combined smoke and CO detectors?

Do you want to source smoke and carbon monoxide alarms and dual smoke-CO 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 multi-gas fire safety 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 combined smoke and CO detectors, smoke and carbon monoxide alarms, dual smoke-CO sensors, integrated smoke and CO testers, and multi-gas fire safety detectors. Our philosophy is simple: win-win cooperation, quality assurance, and exceptional service for every global partner.

Our Core Product Line – Combined Smoke and CO Detection Deepened

Combined smoke and CO detectors provide dual protection against two leading causes of home fatalities: fire and carbon monoxide poisoning. One device protects against both threats, saving installation space, reducing costs, and simplifying maintenance. All products are designed to meet CE, RoHS, EN14604, EN50291, UL217, UL2034, and UKCA certifications.

1. Combined Smoke and CO Detector

• Dual detection technology: advanced photoelectric smoke sensing chamber and high-precision electrochemical CO sensor integrated in one compact housing

• Independent alarm patterns with distinct audible and visual signals for smoke versus CO events for immediate threat identification

• Smoke detection optimized for slow-smoldering fires typical of upholstery, bedding, foam materials, and electrical faults

• CO detection with electrochemical sensor providing accurate readings from 0 to 500 ppm with response time under 60 seconds

• Available configurations: 10-year sealed lithium battery maintenance-free, standard replaceable battery, or hardwired with battery backup for continuous operation

• Interconnectable version with wireless RF communication supporting up to 24 units for whole-home protection

• End-of-life warning at 7 to 10 years prompting complete unit replacement with distinct chirp pattern

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

• Tamper-resistant sealed battery version available for rental property compliance

2. Smoke and Carbon Monoxide Alarm

• Advanced photoelectric smoke chamber with multi-layer insect screen protection preventing false alarms from small insects

• High-precision electrochemical CO sensor with certified 5 to 7 year operational lifespan from leading sensor suppliers

• Large backlit digital display showing real-time CO concentration levels in parts per million from 0 to 999 ppm

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

• Distinct alarm patterns per international standards: three beeps with pause for smoke, four beeps with pause for CO

• Voice alert premium option: electronically synthesized voice announces Fire or Carbon Monoxide for immediate unambiguous identification

• Enhanced hush button silences nuisance smoke alarms for 8 to 10 minutes without affecting critical CO detection functionality

• Single self-test button verifies both smoke sensor sensitivity and CO sensor electrochemical function simultaneously

• Low battery warning with distinct chirp pattern begins when battery reaches end-of-life threshold

3. Dual Smoke-CO Sensor

• Integrated sensor module combining photoelectric smoke detection element and electrochemical CO sensing element in compact OEM-friendly package

• Factory calibrated and tested as complete assembly with calibration certificate provided for each batch

• Digital communication interface options including I2C, UART, or analog voltage output for seamless host system integration

• Ultra-low power consumption optimized for battery-powered applications drawing less than 50 microamps in standby

• Available in multiple sensitivity configurations for different regional market requirements and code compliance

• Ideal for smart home device manufacturers, HVAC system integrators, and industrial safety equipment producers

• Plug-and-play design with standardized pinout for easy integration into existing product lines

4. Integrated Smoke and CO Tester

• Professional grade testing tool specifically designed for combined smoke-CO detectors

• Dual-function aerosol simulates both smoke conditions and calibrated CO concentrations from a single can

• Non-flammable and non-conductive formulation safe for electronic components and live circuits

• Adjustable output nozzle for different sensitivity testing requirements and detector vent configurations

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

• Includes specialized adapter attachment for testing CO sensor function through detector vent openings

• Reusable can design providing approximately 100 tests per can for maintenance professionals

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

5. Multi-Gas Fire Safety Detector

• Expanded detection capability beyond smoke and CO including natural gas methane or LPG propane options

• Three-in-one smoke, CO, and gas or four-in-one configurations available with additional temperature or humidity sensors

• Photoelectric smoke sensor plus electrochemical CO sensor plus semiconductor gas sensor in unified housing

• Ideal for comprehensive home safety in a single device for RVs, boats, cabins, tiny homes, and off-grid applications

• Digital display cycling through readings from all active sensors with clear labeling

• Mobile APP connectivity for remote monitoring with push notifications available on select Wi-Fi and Bluetooth models

• Compact design suitable for space-constrained installations including campers and marine vessels

• Multiple mounting options including ceiling, wall, or shelf placement

All products undergo 100 percent pre-shipment quality control including smoke sensitivity calibration using certified smoke density equipment, CO sensor accuracy verification using calibrated gas concentrations, environmental chamber testing across temperature and humidity ranges, accelerated life testing equivalent to 10 years of operation, and battery capacity verification. Multi-language user manuals available in English, French, German, Spanish, Italian, Polish, Arabic, Russian, Japanese, and Chinese.

Technical Advantages of Combined Smoke and CO Detection

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 combined detector provides complete protection in a single device, reducing cost, installation effort, maintenance requirements, and ensuring no protection gap exists.

Smoke Detection Technology – Photoelectric Chamber

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

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

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

• Detects visible smoke particles typically above 0.3 microns in size

• Meets or exceeds UL217 8th edition and EN14604 standards for smoke sensitivity

• Insect screen protection prevents false alarms from small insects entering sensing chamber

• Drift compensation maintains consistent sensitivity over detector lifespan

Carbon Monoxide Detection Technology – Electrochemical Sensor

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

• Chemical reaction generates electrical current precisely proportional to CO concentration in ambient air

• High measurement accuracy across full range from 0 to 500 ppm CO

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

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

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

• Meets or exceeds UL2034 and EN50291 standards for CO detection accuracy

• Temperature compensation maintains accuracy across operating range

Benefits of Combination Devices

• Single installation location instead of finding space for two separate devices on ceiling or wall

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

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

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

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

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

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

How Combined Detectors Operate

• Smoke sensor and CO sensor operate independently within same housing with separate sensing elements

• Microprocessor monitors both sensor data streams continuously with time-stamped logging

• Onboard algorithm determines alarm condition independently for each hazard type

• Distinct alarm patterns use different beep sequences and LED flash colors to identify threat

• Voice alert premium models announce Fire or Carbon Monoxide for immediate unambiguous identification

• Hush button silences smoke alarm only as safety feature – CO alarms cannot be silenced until safe CO level restored

• CO alarm automatically resets when ambient CO concentration drops below 30 ppm threshold

• Both sensors tested simultaneously with single test button press

Wanlin's combined smoke and CO detectors use premium photoelectric smoke chambers with patented insect protection and high-quality electrochemical CO sensors from ISO-certified Tier 1 suppliers. Each unit undergoes individual smoke sensitivity calibration and CO sensor functional verification 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 combined smoke and CO detection products from hardware to packaging.

Housing and Industrial Design

• Custom colors according to any RAL color code or Pantone Matching System number

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

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

• LED indicator color selection including red for smoke, amber for CO, green for power, blue for interconnect

• Digital display customization options showing CO level, temperature, time, or combination

• Ventilation and sensing port design for optimal smoke and gas entry while maintaining insect resistance

• Premium material options including UV-stabilized ABS and flame-retardant housings

• Low-profile and ultra-slim designs for aesthetic residential applications

• Weather-resistant housing option for garage or workshop installations

Sensor Configuration Options

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

• Electrochemical CO sensor: 5-year or 7-year certified lifespan versions with documentation

• Additional gas sensors integration: natural gas methane, LPG propane, hydrogen, or ammonia

• Environmental sensors: temperature monitoring, humidity sensing, or air quality measurement

• Wireless interconnect module integration with selectable RF frequency for regional compliance

PCB, Electronics, and Firmware

• Calibration parameters adjustable for specific regional standards including UL, EN, AS, NF, VdS

• Alarm algorithm customization for specific environmental conditions or fire risk profiles

• Communication protocol selection including wireless RF frequencies 433MHz, 868MHz, 915MHz

• Alarm sound pattern customization: beep sequences, volume levels, and duration per regional requirements

• Distinct alarm pattern configuration meeting UL or EN standards as requested

• Voice alert language and phrasing customization for any language or specific phrasing

• Self-test scheduling and fault reporting timing configuration

• Drift compensation algorithm adjustment for extended sensor accuracy

• Data logging interval and memory retention configuration

Display and User Interface

• Digital CO display with backlight options including white, blue, or amber

• Peak level memory and one-button reset functionality

• Voice alert customization with multiple language support and custom phrasing

• Mobile APP connectivity for remote monitoring on Wi-Fi or Bluetooth enabled models

• Buzzer volume adjustment options from 75dB to 95dB

• Multi-language display messages for LCD equipped models

Power Options

• 10-year sealed lithium battery for maintenance-free operation with tamper-resistant design

• Replaceable battery: AA alkaline, 9V alkaline or lithium, or CR123A lithium configurations

• Hardwired with battery backup for continuous operation during power outage

• Low voltage DC power options including 12V or 24V for professional fire alarm system integration

• Power over Ethernet for commercial building installations

• Solar compatible options for remote off-grid applications

Wireless and Smart Features

• Wi-Fi 2.4GHz for direct cloud connectivity and mobile app push notifications

• Zigbee 3.0 and Z-Wave for smart home hub integration

• LoRaWAN for long-range battery-operated applications

• Bluetooth 5.0 for local configuration and firmware updates

• Matter protocol support for cross-platform smart home compatibility

• IFTTT integration for custom automation rules

• Alexa and Google Home voice status inquiry support

Packaging and Labeling

• Retail box design with your branding, product photography, and feature highlights

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

• Custom labels with serial number, batch tracking, QR code to installation video, regulatory marks, and barcodes

• Multi-language user manuals and professional installation guides with diagrams

• Hang tags and shelf talkers for retail display

• Bulk pack options for contractor and wholesale distribution

Certification Support

• We help you comply with local standards including UL217 and UL2034 for United States, EN14604 and EN50291 for Europe, AS3786 and AS/RCM for Australia, NF for France, VdS for Germany, BSI for United Kingdom, CCCF for China, and more

• Technical file preparation for product registration in your target countries

• Sample provision for third-party testing laboratories including required quantities

• CO sensor calibration documentation and traceability provided

• Battery safety documentation including UN38.3 for air transportation

• Environmental compliance documentation including RoHS, REACH, and WEEE

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, logo, and packaging
Full Technical Documentation – for product registration, market approval, and insurance compliance
Dedicated R&D Support – for custom sensor integration, wireless development, and voice alert customization

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, smart home integrators, OEM customers, 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 combined smoke and CO detector assembly, calibration, and quality testing processes

• See our CO sensor testing laboratory with certified gas concentration verification equipment

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

• Test our smoke and CO alarms in both live fire simulation and controlled CO concentration tests

• Meet our R&D engineers and discuss custom sensor configurations, firmware development, and voice alert customization

• 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 supply contracts

• Review our quality control documentation including calibration certificates and batch test reports

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.

Our Values

• Quality Guarantee – 100 percent pre-shipment inspection, smoke sensitivity calibration verification on every unit using certified equipment, CO sensor accuracy verification using calibrated gas concentrations on batch samples, environmental chamber testing including temperature and humidity, accelerated life testing on production samples, 1-year warranty with replacement guarantee, extended warranty options available

• 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 and troubleshooting, CO sensor consultation, emergency support available

• Fair Pricing – No hidden fees or unexpected charges, transparent cost breakdown including materials, sensors, battery, labor, 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 combined smoke and CO 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 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 combined detector installation instructions, CO safety information, and troubleshooting – we translate and design professionally

• Custom retail box design with your product photography and 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, 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 on batch samples with documented results

• 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

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

• 100 percent final functional testing including smoke sensitivity, CO response, alarm sound output decibel measurement, LED indicator verification, button function test, and wireless communication check before packaging

• Third-party inspection supported including SGS, BV, TUV, Intertek, 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 and UL declarations of conformity, MSDS for batteries, UN38.3 test reports for air transport, CO sensor calibration documentation, and radio certification documents for wireless models

• Flexible shipping options: sea freight including FCL 20ft or 40ft containers and LCL consolidation, 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 and duty payments

After-Sales Support

• Technical hotline for installation assistance, troubleshooting, and configuration questions

• CO sensor lifespan guidance and replacement scheduling support

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

• 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

• Firmware updates for wireless and smart models as needed via OTA or manual update

• CO sensor end-of-life replacement guidance for distributors

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.

Applications for Combined Smoke and CO Detectors

Wanlin's combined smoke and CO detectors are ideal for residential and light commercial applications where both fire and carbon monoxide hazards exist.

• Residential homes and apartments of all sizes – complete protection in every sleeping area and each level

• Hotels, motels, inns, and vacation rentals – guest room safety compliance with simplified maintenance

• Rental properties and leased housing – landlord compliance with fewer devices and tamper-resistant options

• Vacation homes, cabins, and seasonal properties – protection for unoccupied periods with long-life battery

• RVs, campers, travel trailers, and mobile homes – space-saving solution for compact living

• Boats, yachts, and marine vessels – both smoke from electrical fires and CO from engine exhaust

• Garages and attached workshops – CO hazard from vehicle exhaust migration into living spaces

• Homes with attached garages – critical protection against CO migration

• Homes with fuel-burning appliances – furnaces, water heaters, gas stoves, fireplaces, space heaters

• Senior living facilities and assisted living – simplified maintenance with fewer devices to manage

• Schools and daycare centers – complete protection in boiler rooms, kitchens, and mechanical spaces

• Small offices and commercial spaces – cost-effective code compliance

• Construction site trailers and temporary offices – portable protection during construction phase

• Tiny homes and container homes – maximizing limited ceiling space

Carbon Monoxide Safety Information

Why CO Detection is Critical for Every Home

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

• Hundreds of people die annually from accidental CO poisoning in residential settings

• Thousands more visit emergency rooms for CO poisoning treatment

• Common sources include furnaces, water heaters, fireplaces, portable generators, vehicles in attached garages, gas stoves, space heaters, and charcoal grills used indoors

• Early symptoms mimic common flu: headache, dizziness, nausea, confusion, fatigue, and 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

Where to Install Combined Detectors for Maximum Protection

• Each sleeping area or bedroom – essential for waking occupants during sleep

• Each level of the home including basement and finished attic

• Outside each sleeping area in hallway within 10 feet of bedroom doors

• Near attached garages with CO hazard potential

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

• In rooms with fuel-burning appliances

• On every floor of multi-level homes

Where NOT to Install Combined Detectors

• Within 15 feet of cooking appliances to avoid cooking false alarms

• In garages where vehicle exhaust will cause frequent false alarms

• In direct sunlight or near HVAC supply vents and return air grilles

• In areas with temperature consistently below -10°C or above 55°C

• In extremely dusty, humid, or greasy environments

• In dead air spaces such as corners of rooms or peaked ceilings

• Within 3 feet of heating or cooling ducts

Comparison Guide – Combined Detector versus Separate Devices

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