GS018-CH4 Dual-channel thermopile Methane Sensor
The dual-channel thermopile methane gas detector is a new type of methane (CH₄) NDIR detector manufactured using CMOS-MEMS technology, featuring high infrared responsivity, high repeatability, and high reliability. The detector is housed in a TO-39 metal package and incorporates a high-precision thermistor chip for ambient temperature compensation. It is equipped with two infrared filter windows (transmittance curves shown below) and features dual-channel detection, which mitigates the impact of environmental conditions on the detector. It is widely applicable for CH₄NDIR gas detection and spectral analysis.
Features：
High infrared responsivity, high signal-to-noise ratio
Dual-window packaging, high reliability
Electromagnetic interference (EMI) resistance
High-precision thermistor with ambient temperature compensation
Parameters:
Parameter | Symbol | Typical value | Unit | Remark |
Resistance of Chip Resistor
| RTP | 84±10 | KΩ | 25ºC |
Temperature Coefficient | TCRTP | 0.02 | %/K | 25ºC |
Signal Voltage Filter1 F3.91 Channel | Vs | 55 | μV | MET Sensor test set-up: IR source Axetris-EMIRS200, 6.5 V, 4 Hz, distance 15 mm |
Signal Voltage Filter2 F3.30 Channel | Vs | 80 | μV | |
Response time | t | 13 | ms | |
Equivalent Noise Voltage | VN | 37 | nV/Hz1/2 | 25ºC |
Applications：
NDIR CH4 gas detector
Downhole safety monitoring
Industrial process monitoring
Kitchen gas monitoring
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