PRODUCT MODEL |
MQ-4 Natural Gas Sensor |
product type |
semiconductor gas sensor |
Standard packaging |
Rubber wood, metal cover |
Detect gas |
methane |
Detect concentration |
300-10000 ppm (methane) |
Standard circuit conditions |
loop voltage |
Vc |
≤24V DC |
heating voltage |
VH |
5.0V±0.1V ACorDC |
load resistance |
RL |
adjustable |
Characteristics of gas sensing components under standard testing conditions |
heating resistor |
RH |
26 Ω± 3 Ω (room temperature) |
Heating power consumption |
PH |
≤950mW |
Output voltage |
Vs |
2.5V~4.0V(in 5000ppm CH4 ) |
sensitivity |
S |
Rs (in air)/Rs (5000ppm methane) ≥ 5 |
Concentration slope |
α |
≤0.6(R5000ppm/R1000ppm CH4) |
Standard testing conditions |
Temperature and humidity |
20℃±2℃; 65%±5%RH |
Standard Test Circuit |
Vc:5.0V±0.1V; VH:5.0V±0.1V |
Warm-up time |
Not less than 48 hours |
Oxygen concentration |
21% (not less than 18%) (Oxygen concentration will affect the initial value, sensitivity, and repeatability of the sensor. Please consult for use when using at low oxygen concentrations) |
lifetime |
10 Years |