Clear Turbine Water Flow Sensor with 3-Pin JST

Clear-body turbine water flow meter with Hall-effect pinwheel sensor and 3-pin JST connector. Measures flow rate by counting magnetic pulses; sensor stays dry outside the fluid path.

Logical pinout · physical placement not verified

Red5-15VDCJST PH 2mm cable conductor: red
Positive supply wire for the water-flow sensor. Adafruit states the sensor has three wires: red (5-15VDC), black (ground), and yellow (Hall effect pulse output).
Type · PowerVoltage · 5-15VDC
BlackGroundJST PH 2mm cable conductor: black
Ground/return wire for the water-flow sensor. Adafruit states the three-wire mapping includes black as ground.
Type · GroundVoltage · 0V return
YellowHall effect pulse outputJST PH 2mm cable conductor: yellow
Pulse output from the Hall effect sensor. Adafruit states the yellow wire is the Hall effect pulse output and each pulse is approximately 2.25 millilitres.
Type · Signal

Pin	Position	Type	Function	Voltage
Red5-15VDC	JST PH 2mm cable conductor: red	Power	Positive supply wire for the water-flow sensor. Adafruit states the sensor has three wires: red (5-15VDC), black (ground), and yellow (Hall effect pulse output).	5-15VDC
BlackGround	JST PH 2mm cable conductor: black	Ground	Ground/return wire for the water-flow sensor. Adafruit states the three-wire mapping includes black as ground.	0V return
YellowHall effect pulse output	JST PH 2mm cable conductor: yellow	Signal	Pulse output from the Hall effect sensor. Adafruit states the yellow wire is the Hall effect pulse output and each pulse is approximately 2.25 millilitres.

Logical pinout · physical placement not verified

Pin details

3 connections

Red5-15VDC
Positive supply wire for the water-flow sensor. Adafruit states the sensor has three wires: red (5-15VDC), black (ground), and yellow (Hall effect pulse output).
PowerVoltage · 5-15VDC
JST PH 2mm cable conductor: red
BlackGround
Ground/return wire for the water-flow sensor. Adafruit states the three-wire mapping includes black as ground.
GroundVoltage · 0V return
JST PH 2mm cable conductor: black
YellowHall effect pulse output
Pulse output from the Hall effect sensor. Adafruit states the yellow wire is the Hall effect pulse output and each pulse is approximately 2.25 millilitres.
Signal
JST PH 2mm cable conductor: yellow

Start wiring

Analog · UART · 3.3 – 5 V · Gravity

Verify supply voltage and logic levels before powering up.

Module pins: Red / 5-15VDC, Black / Ground, Yellow / Hall effect pulse output. Schematik maps them to your board in the app.

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