5 × 5 mm MEMS Package
Requires very little PCB area and has a profile of only 1.55 mm.
GM-702B Ultra-Compact MEMS Carbon Monoxide Sensor
The GM-702B is an ultra-compact 5 × 5 × 1.55 mm MEMS metal-oxide carbon monoxide sensor. It combines a wide 5–5000 ppm range with heater consumption of 50 mW or less for miniature and low-power CO detection equipment.
BrandWinsen
Sensing PrincipleMEMS Semiconductor
Target GasCO
Product TypeMEMS CO Gas Sensor
Gas Sensing for OEM Integration
Product Overview
A low-profile MEMS CO sensor for compact residential and industrial carbon monoxide products.
A silicon MEMS micro-hotplate supports the metal-oxide sensitive layer and changes conductivity as carbon monoxide concentration rises.
Its ceramic encapsulation, small footprint and low heater power help reduce PCB area and energy consumption in connected gas-sensing devices.
Designed for Reliable Integration
Key Features
Wide 5–5000 ppm Range
Supports both low-level leakage indication and higher CO concentration detection.
Heater Power ≤50 mW
Reduces energy consumption compared with traditional heated semiconductor sensors.
Strong MEMS Structure
Uses a silicon micro-fabricated hotplate and ceramic encapsulation.
Simple Resistance Output
A basic external circuit converts conductivity into a voltage signal.
Residential and Industrial Use
Suitable for compact CO leakage detectors across multiple product types.
Typical Use Cases
Applications
Compact Residential CO Detectors
Industrial CO Leakage Detection
Battery-Powered Gas Devices
Connected Safety Sensors
Official Product Parameters
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | GM-702B |
| Sensor Type | MEMS carbon monoxide gas sensor |
| Standard Encapsulation | Ceramic |
| Detected Gas | Carbon monoxide (CO) |
| Detection Range | 5–5000 ppm |
| Loop Voltage | ≤24 V DC |
| High-Temperature Heater Voltage | 2.5±0.1 V AC or DC |
| Low-Temperature Heater Voltage | 0.5±0.1 V AC or DC |
| Heating Time | 60±1 s high temperature; 90±1 s low temperature |
| Load Resistance | Adjustable |
| Heater Resistance | 80±20 Ω at room temperature |
| Heater Consumption | ≤50 mW |
| Dimensions | 5 × 5 × 1.55 mm |
Specifications are based on the official Winsen product page or product manual. Confirm the latest datasheet, calibration requirements, communication protocol and mechanical drawing before final product design.
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