Principle Introduction:
RTGA71 sensor is a single-channel thermopile gas sensor, which contains a thermopile chip based on MEMS technology and connects hundreds of pairs of thermocouples in series, to convert the absorbed infrared radiation into a voltage signal. There is a narrow-band filter in the front of the sensor, and the sensor can be used for the detection of carbon dioxide concentration. The sensor NTC itself has temperature compensation, to improve the measurement accuracy.

Applications :
NDIR (CO2) Gas Detection device;

CO2 gas control in industrial workshop;

CO2 emission control of combustion furnace.

Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.

Parameter	Value	Unit	Remarks
Chip size	1.35×1.35	mm	/
Field of view	95	Degree	Above 50%
Filter center wavelength	4.26	um
Thermopile resistor	76±10	KΩ	25℃,1V
Noise voltage	38	nV/Hz1/2	25℃
Noise equivalent power	0.23	nW/Hz1/2	500K, 1Hz, 25℃
Response rate	160±40	V/W	500K, 1Hz, 25℃
Temperature coefficient of resistance	0.06	%/℃	25℃~75℃
Time constant	≤13	ms
ChipDetection rate	1.5 ×108	cmHz1/2/W	500K, 1Hz, 25℃
NTC resistance	100 ±1％	KΩ	25℃
NTC(β)	3950 ± 1％	/	25℃/50℃
Working temperature	-30 ~ 125℃

Reference Circuit :

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