Liquid Flow Meter - Brass 1/2" Nominal Threaded
Inline brass flow meter with a Hall-effect pinwheel sensor; each pulse represents approximately 2 mL of flow. Outputs digital pulses on a yellow wire (5–18 V supply). Not a precision instrument — calibrate carefully if better than 10% accuracy is needed.
Pinout
- Red wire
5-18VDC power lead for the flow sensor, as stated by the Adafruit product page.
Type · PowerVoltage · 5-18VDC - Black wire
Ground lead for the flow sensor, as stated by the Adafruit product page.
Type · GroundVoltage · 0V - Yellow wire
Hall-effect pulse output. Adafruit states each output pulse is approximately 2 millilitres of flow.
Type · GPIO
| Pin | Type | Function | Voltage |
|---|---|---|---|
| Red wire | Power | 5-18VDC power lead for the flow sensor, as stated by the Adafruit product page. | 5-18VDC |
| Black wire | Ground | Ground lead for the flow sensor, as stated by the Adafruit product page. | 0V |
| Yellow wire | GPIO | Hall-effect pulse output. Adafruit states each output pulse is approximately 2 millilitres of flow. |
Pin details
3 connections- Red wire
5-18VDC power lead for the flow sensor, as stated by the Adafruit product page.
PowerVoltage · 5-18VDC - Black wire
Ground lead for the flow sensor, as stated by the Adafruit product page.
GroundVoltage · 0V - Yellow wire
Hall-effect pulse output. Adafruit states each output pulse is approximately 2 millilitres of flow.
GPIO
Start wiring
Analog · I2C · UART · 3.3 – 5 V · Breakout
Verify supply voltage and logic levels before powering up.
Module pins: Red wire, Black wire. Schematik maps them to your board in the app.
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