MP-702 Ammonia Gas Sensor

The MP-702 ammonia gas sensor adopts a multi-layer thick film manufacturing process. The heater and the metal oxide semiconductor gas sensing layer are respectively made on both sides of the micro Al2O3 ceramic substrate, and are packaged in a metal shell. When the detected gas exists in the ambient air, the conductivity of the sensor changes. The higher the concentration of the gas, the higher the conductivity of the sensor. This change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.

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Gallery display

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Sensor Features
This product has high sensitivity to ammonia gas; it has the advantages of fast response recovery, low power consumption, simple detection circuit, good stability and long life.

main application
It is widely used for gas detection in refrigerators, ammonia leakage detection in refrigerators, and ventilation control in agriculture and aquaculture.

Technical indicators

Product number			MP-702
product type			Planar Semiconductor Gas Sensor
standard package			metal package
detect gas			Ammonia
Detection concentration			0～100ppm（NH₃）
Standard Circuit Conditions	loop voltage	V_c	≤24V DC
	heating voltage	V_H	5.0V±0.1V AC or DC
	Load Resistance	R_L	adjustable
Gas sensor characteristics under standard test conditions
	heating resistance	R_H	95±10Ω（room temperature）
	Heating power consumption	P_H	≤300mW
	Sensitivity	S	Rs(in air)/Rs(in 50ppm NH₃)≥5
	Sensitive body resistance	Rs	1KΩ～30KΩ (in 50ppm NH₃)
	Concentration slope	α	≤0.6(R_100ppm/R_30ppmNH₃)
Standard Test Conditions	temperature humidity		20℃±2℃；65%±5%RH
	Standard Test Circuit		VC:5.0V±0.1V； V_H :5.0V±0.1V
	Preheat time		Not less than 48 hours

Note: Product parameters are subject to change without prior notice

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You can contact us through the online message and online customer service on the right, or you can call our national service hotline: 0371-60932951.