YJJ MQ-8 MQ-8B Low-Cost Hydrogen Gas Sensor For Multiple Applications

Product Description:

YJJ MQ-8 MQ-8B Low-Cost Hydrogen Gas Sensor for Multiple Applications

Features:

Gas-sensitive material used for the mq-8 hydrogen gas sensor is SnO2, which has low conductivity in clean air.When hydrogen gas exists in the environment of the gas sensor, the conductivity of the sensor increases with the increase of the concentration of combustible gas in the air.The change in conductivity can be converted into an output signal corresponding to the concentration of the gas using a simple circuit.

MQ-8 hydrogen gas sensor is highly sensitive to hydrogen and is ideal for monitoring other hydrogen gas.This sensor can detect a variety of hydrogen gas, especially city gas, and is a low-cost gas sensor suitable for a variety of applications.

Sensor characteristics

Good sensitivity to hydrogen over a wide range of concentrations

Long life and low cost

Simple drive circuit can be

The main application

It is widely used in household gas leak alarm, industrial hydrogen alarm and portable gas detector.

Technical indicators

Product model mq-8

Product type semiconductor gas sensitive element

Standard package bakelite, metal cover

Detection of gas hydrogen

Detection concentration 100 ~ 1000ppm(hydrogen)

Standard circuit conditional circuit voltage Vc ≤24V DC

Heating voltage VH 5.0v ± 0.1v AC or DC

Load resistance RL adjustable

Standard test element characteristic under the condition of heating resistance RH 29 Ω plus or minus 3 Ω (room temperature)

Heating power consumption PH ≤900mW

Sensitivity S Rs(in air)/Rs(in 1000ppm H2)≥5

Output voltage S 2.5v ~ 4.0v (in 1000ppm H2)

Concentration slope ≤0.6(R1000ppm/R400ppm H2)

Standard test conditions temperature and humidity 20℃±2℃;55% + / - 5% RH

Standard test circuit Vc: 5.0v ± 0.1v;The VH: 5.0 V + / - 0.1 V

The warm-up time shall not be less than 48 hours

Oxygen content 21% (no less than 18%, oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor, please consult the use at low oxygen concentration)

Ten years of life

Note: the output voltage (Vs) refers to VRL in the test atmosphere

Specifications: