Product Introduction
SMT-04B is a semiconductor type gas sensor used to detect combustible gases such as methane and natural gas. The conductivity of the gas-sensitive material of the sensor will change accordingly with the concentration of the measured gas. A simple test circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration. The sensor has a strong anti-interference ability to alcohol and some other interfering gases.
Main Application
● Civilian gas leak detector and alarm
● Portable gas detector
Sensor Characteristics
● High sensitivity
● Stable performance
● Fast response and recovery time
● Good shock resistance
● Strong anti-interference ability
● Long life time
For more information, Please check our product datasheet or send the consultation to us.
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|
Item |
Parameter |
|
Detection Gas |
Methane Natural gas |
|
Detection Concentration Range |
300～10000ppm(methane) |
|
Heating Voltage(VH) |
5V±0.1V DC or PWM |
|
Sensor Working Voltage |
≤24V DC |
|
Heating Element Resistance (RH) |
29Ω±3Ω (room temperature) |
|
Heating Power (PH) |
≤950mW |
|
Sensitivity (S) |
Rs(in air)/Rs(5000ppm CH4)≥ 5 |
|
Output Voltage Range (VS) |
2.5V～4.0V(in 5000ppmCH4) |
|
Concentration Response Ratio |
≤0.6(R5000ppm/R1000ppm CH4) |
|
Test Environment |
20℃±2℃; 55%±5%RH |
|
Life Time |
10 years |
