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Carbon Monoxide Semiconductor MQ-7 CO Gas Sensor
|
Model No. |
MQ-7 |
||
|
Sensor Type |
Semiconductor |
||
|
Standard Encapsulation |
Plastic |
||
|
Detection Gas |
Carbon Monoxide |
||
|
Concentration |
10-10000ppm CO |
||
|
Circuit |
Loop Voltage |
Vc |
≤10V DC |
|
Heater Voltage |
VH |
5.0V±0.2V AC or DC(High) 1.5V±0.1V AC or DC(Low) |
|
|
Heater Time |
TL |
60±1S(High) 90±1S(Low) |
|
|
Load Resistance |
RL |
Adjustable |
|
|
Character |
Heater Resistance |
RH |
31Ω±3Ω (Room Tem.) |
|
Heater consumption |
PH |
≤350mW |
|
|
Sensing Resistance |
Rs |
2KΩ-20KΩ(in 100ppm CO ) |
|
|
Sensitivity |
S |
Rs(in air)/Rs(100ppm CO)≥5 |
|
|
Slope |
α |
≤0.6(R300ppm/R100ppm CO) |
|
|
Condition |
Tem. Humidity |
20°C±2°C, 65%±5%RH |
|
|
Standard test circuit |
Vc:5.0V±0.1V, VH(High): 5.0V±0.1V, VH(Low): 1.5V±0.1V |
||
|
Preheat time |
Over 48 hours |
||
