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Product description:

MP-4 combustible gas sensor uses a multi-layer thick film manufacturing process in miniature

A heater and a metal oxide semiconductor gas sensing layer are respectively formed on both sides of the Al2O3 ceramic substrate, and are packaged in a metal case. The conductivity of the sensor changes when there is a detected gas in the ambient air. The higher the concentration of the gas, the higher the conductivity of the sensor. This change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit.

Features:

This product has good sensitivity to methane in a wide concentration range, and has the advantages of strong anti-interference ability, low power consumption, fast response recovery, good stability, long life, low cost, and simple driving circuit.

Application:

1. Combustible gas leakage monitoring device, fire/safety detection system for home, factory and commercial use.

2. Combustible gas leakage alarm, gas leak detector.

Parameter:

Detection gas: methane, natural gas, biogas
Detection concentration: 300 ~ 10000ppm (methane, natural gas)
Loop voltage VC: ≤24V DC
Heating voltage VH : 5.0V ± 0.1V AC or DC
Load resistance RL: adjustable
Heating resistor RH: 85Ω ± 15Ω (room temperature)
Heating power consumption PH : ≤350mW
Sensitive body resistance RS: 1KΩ～20KΩ (in 5000ppm methane)
Sensitivity S : Rs (in air) / Rs (in 5000ppm methane) ≥ 5
Concentration slope α: ≤0.6 (R5000ppm/R1000ppm methane)
Temperature, humidity: 20 °C ± 2 °C; 55% ± 5% RH
Standard test circuit: VC: 5.0V ± 0.1V; VH: 5.0V ± 0.1V
Warm-up time: no less than 48 hours
Oxygen concentration: 21% (not less than 18%, (oxygen concentration will affect the initial value of the sensor, sensitivity and repeatability, use at low oxygen concentration)
Please consult when using)
Life expectancy: 10 years

Note: The above figure shows the basic test circuit of the MP-4 sensor. The sensor requires two voltages to be applied: heater voltage (VH) and test voltage (VC). The VH is used to provide a specific operating temperature for the sensor, either DC or AC. The VRL is the voltage across the load resistor (RL) of the sensor in series. VC is the voltage for testing the load resistor RL and requires a DC power supply.

On Nov 17, 2023 at 03:22:33 PST, seller added the following information: