SEN0661 · DFRobot
The Gravity: SFA40 HCHO Sensor is an electrochemical formaldehyde detection module based on the Sensirion SFA40 chip. It measures HCHO concentrations from 0–2000 ppb with a low detection threshold of 20 ppb and error margin of ±20 ppb. (DFRobot SEN0661)
| Part number | SEN0661 |
|---|---|
| Manufacturer | DFRobot |
| Category | Sensors › Gas & Air Quality |
| Pins | 3 |
Gravity: SFA40 Formaldehyde (HCHO) Sensor (0-2000ppb, ±20ppb Accuracy) pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SIG | bidirectional | Digital or analog signal |
| 2 | VCC | power | |
| 3 | GND | ground |
Schematic symbol and footprint
Footprint: JST PH 2.0 mm 3-pin through-hole (Gravity PH2.0-3P) — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
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