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Track Water or Liquid Flow with a Simple Sensor
The Water Hall Flow Sensor G1/2 is a hall effect flow sensor with uart designed for liquid metering, pump feedback, and water system monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Measurement Range: 1 to 30 Liters/Minute; Humidity Range: 35%–80% RH; Working Voltage: 5V to 18V DC (min tested: 4.5V).
Important: Flow readings depend on liquid type, pipe size, and mounting direction. Calibrate in your own system for the best result.
Why you’ll love it
- Key feature: Sealed integrated magnetic hall effect sensor outputs an electrical pulse with every revolution
- Useful spec: Hall Effect
- Controller output: 5V TTL
- Sensing range: 1 to 30 Liters/Minute
- Power range: 5V to 18V DC (min tested: 4.5V)
- Current draw: 15mA @ 5V
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Water Hall Flow Sensor G1/2 | hall effect flow sensor with UART | Current item |
| Water Flow Sensor G1 | flow sensor | hall-effect detection |
| Liquid Flow Meter - Plastic 3/4" NPS Threaded | flow sensor | hall-effect detection |
| Water Flow Sensor YF-S401 | flow sensor | SPI interface |
What you can build
This sensor is a good fit for smart water meters, coolant flow alarms, dosing systems, beverage dispensers, and irrigation monitors.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include hose fittings, clamps, and a waterproof enclosure, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Water Hall Flow Sensor G1/2 |
|---|---|
| Sensor Type | Hall Effect |
| Output Type | 5V TTL |
| Measurement Range | 1 to 30 Liters/Minute |
| Humidity Range | 35%–80% RH |
| Working Voltage | 5V to 18V DC (min tested: 4.5V) |
| Current Draw | 15mA @ 5V |
| Accuracy | ±10% |
| Pipe Size | 1/2" nominal thread (0.78" OD) |
Wiring & usage notes
Connect power and ground, then wire TX and RX to a serial-capable controller at the correct logic level and baud rate. Flow readings depend on liquid type, pipe size, and mounting direction. Calibrate in your own system for the best result.
What’s in the box
1 × Water Hall Flow Sensor G1/2
Frequently Asked Questions
What does the Water Hall Flow Sensor G1/2 measure?
It is designed to measure magnetic field or magnetic presence.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this UART sensor?
This version uses UART or serial output, so you connect power plus TX and RX at the correct logic level.
What affects accuracy?
Power quality, wiring, mounting, target material, and the real environment can all affect the reading. It is best to test and calibrate in the final setup.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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