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MQ-7B Carbon Monoxide Gas Sensor

MQ-7B Carbon Monoxide Gas Sensor

Sensor de Monóxido de Carbono (CO).

COD: WINMQ7B

Peso: 0.005 Kg

Disponibilidad: En Stock

Su correo electrónico:

ARS 141.00

Cantidad:

El producto no está disponible para la venta en este momento

Características

Sensitive material of MQ-7 gas sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO when low temperature (heated by 1.5V). The sensor’s conductivity is more higher along with the gas concentration rising. When high temperature (heated by 5.0V), it cleans the other gases adsorbed under low temperature. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
MQ-7 gas sensor has high sensitity to Carbon Monoxide. The sensor could be used to detect different gases contains CO, it is with low cost and suitable for different application.

Character: 

  • Good sensitivity to Combustible gas in wide range
  • High sensitivity to Natural gas
  • Long life and low cost
  • Simple drive circuit

Application:

  • Domestic gas leakage detector
  • Industrial CO detector
  • Portable gas detector
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 AcorDC(High)
1.5V±0.1V ACorDC(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�??±2�??�?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

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