Principle Introduction:
Winsen Electronics produces CO2 gas sensor MD62, using thermal conductor working principle for industrial spot CO2 detection.
MD62 gas sensor consists of an active element and a reference element with the same resistance, both elements are placed in a Wheatstone bridge circuit. Along with the analyzing gas contents change, the overall thermal coefficient of mixed gases changes correspondingly. When the active element meet the combustible gas, its resistance become smaller, and when It meet reducing gas, its resistance become larger(air background). Then the output voltage of the bridge changes and the voltage variation rises in direct proportion to the gas concentration. The reference element performs as a benchmark while for temperature compensation.

Applications :
Industrial spot for CO2 detecting

Technical parameters :

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

Detection Gas	CO2
Type	Thermal conductor
Standard Encapsulation	Metal, Metallurgy powder mesh
Detection Range	0~100%VOL
Working Voltage(V)	3.0±0.1 (DC)
Working current(mA)	≤120 mA
Sensitivity (mV/10%CO2)	≥5
linearity	≤5%
Response time (90%)	≤15 s
Resume time (90%)	≤30 s
Using Environment	-20~+50°C < 95%RH
Storage Environment	-20~+70°C < 70%RH
Dimension（mm）	19×9.5×14

Reference Circuit :

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