Carbon Monoxide Threshold Alarm Sensor (0-1000ppm, 5-24V)
CO sensor with factory-fixed 20ppm alarm threshold, LED indicator, and digital high/low output (5–24V). Range covers 0–1000ppm; threshold is not user-adjustable.
Pinout
- V+
Positive DC supply input for the sold carbon-monoxide threshold alarm sensor. DFRobot states 5-24V DC operation.
Type · powerVoltage · 5-24V DC - GND
Power and signal ground return for the sensor connection port/cable.
Type · groundVoltage · 0V - OUT
Threshold alarm output signal. DFRobot specifies High=5-24V when CO exceeds the fixed 20ppm danger threshold and Low=0V when safe.
Type · digitalVoltage · High=5-24V, Low=0V
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| V+ | power | Positive DC supply input for the sold carbon-monoxide threshold alarm sensor. DFRobot states 5-24V DC operation. |
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: V+, GND. Schematik maps them to your board in the app.
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