[shortdesc]Application:Widely used in gas detection of refrigerators, ammonia leak detection in cold storage, and ventilation control in agricultural breeding.
Feature:MEMS technology, Strong construction,High sensitivity to NH3 gases,Small sizes and low power consumption[/shortdesc]

Description

MEMS NH3 gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.

Application

Widely used in gas detection of refrigerators, ammonia leak detection in cold storage, and ventilation control in agricultural breeding.

Features

MEMS technology, Strong construction
High sensitivity to NH3 gases
Small sizes and low power consumption
Fast response and resume
Simple drive circuit, Long lifespan

Specifications

Part No.			GM-802B
Sensor Type			MEMS
Standard Encapsulation			Ceramic
Detection Gas			NH3 etc.
Detection Range			1~300ppm (NH3)
Standard Circuit Conditions	Loop Voltage	VC	≤24V DC
	Heater Voltage	VH	2.0V±0.1V AC or DC
	Load Resistance	RL	Adjustable
Sensor character under standard test conditions	Heater Resistance	RH	80Ω±20Ω（room temperature）
	Heater consumption	PH	≤45mW
	sensitive materials resistance	RS	1KΩ～30KΩ(in 50ppm NH3 )
	Sensitivity	S	R0(in air)/Rs(in 50ppm NH3)≥3
	Concentration Slope	α	≤0.9(R200ppm/R50ppm NH3 )
Standard test conditions	Temp. Humidity		20℃±2℃；55%±5%RH
	Standard test circuit		VH:2.0V±0.1V；VC:5.0V±0.1V
	Preheat time		Not less than 48 hours

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

10 pcs GM-802B MEMS NH3 Gas Sensor