Winsen MQ-7B Carbon Monoxide Sensor


A silicon microchip, housed in a plastic shell, sends an electrical charge to a small detection chamber that contains a CO sensor. This sensor can detect and measure CO concentration in the atmosphere. If the sensor detects high levels of CO, the microchip will trigger an alarm

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Sensitive material of MQ-7B 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.
It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm and portable CO gas detector.
Small in size
Best quality product
High sensitivity, high resolution, low power consumption
Fast response time
Excellent stability
Long lifespan
Anti-poisons, anti-vapor interference

Model MQ-7B
Sensor Type Semiconductor
Standard Encapsulation Plastic cap
Target Gas carbon monoxide
Detection range 10~500ppm CO
Heater consumption PH ≤900mW
Sensitivity S Rs(in air)/Rs(in 150ppm CO)≥5


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