MQ-7 Gas Sensor

Product Description 

This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

MQ7 Sensor Specifications

• Operating Voltage is +5V
• Can be used to Measure or detect CO
• Analog output voltage: 0V to 5V
• Digital Output Voltage: 0V or 5V
• Stable, Long life and Low Cost
• Fast Response time
• Heater consumption about 350mW
• The Sensitivity of Digital Output pin can be varied using the potentiometer