Gravity: Formaldehyde (HCHO) Sensor
Formaldehyde (HCHO) sensor module for air quality monitoring, compatible with Arduino and Raspberry Pi. Offers high sensitivity, stability, and a long lifespan.
Pinout
- SType · Signal
- +Type · Power
- -Type · Ground
- SWType · Control
| Pin | Type |
|---|---|
| S | Signal |
| + | Power |
| - | Ground |
| SW | Control |
Pin details
4 connections- SSignal
- +Power
- -Ground
- SWControl
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: +, -, S. Schematik maps them to your board in the app.
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