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Carbon Monoxide Gas Sensor MQ-7

Winsen Sensor

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SKU:
095-MQ-7
MPN:
MQ-7
MQ-7B Carbon Monoxide Sensor - Winsen Sensor
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Technical Specifications

Brand:
Winsen Sensor
Standard Encapsulation:
Plastic cap
Heater Voltage:
5.0V AC or DC
Sensing Range:
10~500ppm CO
Load Resistance:
Adjustable
Loop Voltage:
< 10V DC
Sensor Type:
Semiconductor
Tem. Humidity:
20C, 55%+/-5%RH
Sensitivity:
Rs(in air)/Rs(in 150ppm CO)>5
Output Voltage:
2.5V~4.3V (in 150ppm CO)
Concentration Slope:
< 0.6(R300ppm/R50ppm CO)
Target Gas:
Carbon Monoxide CO

Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.

Description

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 at low temperature(heated by 1.5V).The sensor’s conductivity gets higher along with the CO gas concentration rising. At high temperature(heated by 5.0V),it cleans the other gases adsorbed at low temperature. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

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