Thermal Conductivity Principle
Measures gas-composition changes through the thermal response of matched sensing elements.
MD62 Thermal Conductivity CO2 Gas Sensor
The MD62 is a thermal-conductivity CO2 gas sensor for industrial carbon-dioxide detection. Its active and reference elements form a Wheatstone bridge, providing a linear concentration-related voltage change with temperature compensation.
BrandWinsen
Sensing PrincipleThermal Conductivity
Target GasCO2
Product TypeThermal Conductivity CO2 Gas Sensor
CO2 Sensing for OEM Integration
Product Overview
A compact thermal-conductivity sensing element for industrial CO2 detection, including oxygen-deficient environments.
The sensor contains matched active and reference elements in a Wheatstone bridge. Changes in the thermal conductivity of the surrounding gas alter the bridge output in relation to gas concentration.
The reference element provides a baseline for temperature compensation, supporting reproducibility and reliable performance in suitable industrial instruments.
Designed for Reliable Integration
Key Features
Linear Output Signal
The product page specifies a linear bridge output related to CO2 concentration.
Good Reproducibility
Designed for repeatable and reliable performance in industrial equipment.
Poisoning Resistance
The sensing structure is described as resistant to toxicosis.
Low-oxygen Operation
Can detect CO2 without oxygen or under oxygen-deficient conditions.
Compact Element
The sensor dimensions are 19 × 9.5 × 14 mm.
Typical Use Cases
Applications
Industrial CO2 Detection
High-concentration Gas Monitoring
Oxygen-deficient Environments
Embedded Gas Analyzers
Official Product Parameters
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | MD62 |
| Detected Gas | Carbon dioxide (CO2) |
| Detection Principle | Thermal conductivity |
| Working Voltage | 3.0±0.1 V DC |
| Working Current | ≤120 mA |
| Sensitivity | ≥5 mV per 10% CO2 |
| Linearity | ≤5% |
| Output Signal | Linear Wheatstone-bridge voltage signal |
| Response Time, 90% | ≤15 s |
| Recovery Time, 90% | ≤30 s |
| Operating Environment | -20°C to +50°C; <95% RH |
| Storage Environment | -20°C to +70°C; <95% RH |
| Dimensions | 19 × 9.5 × 14 mm |
| Explosion-proof Marking | Exdib I |
Specifications are based on the official Winsen product page. Confirm the latest datasheet, communication protocol, calibration requirements and mechanical drawing before final product design.
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