Why choose Communica for flow sensors in stock
Find the right flow sensor fast: whether you are a student building a lab experiment, a maker integrating fluid monitoring into an IoT prototype, or a procurement team sourcing repeatable parts for production, Communica keeps commonly used liquid and gas flow sensors available from local branches. Our advantage is practical - same-day collection from Samrand when in stock, transparent VAT invoices for tertiary purchases, and a depth of accessories so you can ship or build without multiple wait cycles.
Typical flow sensor types we stock
- Hall-effect turbine / paddlewheel sensors - low-cost, pulse-output for water flow metering.
- Thermal mass flow sensors - compact, digital outputs for low-rate gas measurement.
- Ultrasonic clamp-on sensors - non-intrusive options for liquids where contamination must be avoided.
- Oval gear and positive-displacement meters - mechanical accuracy for viscous fluids and dosing.
Specifications that matter - read before you buy
When you compare models, prioritise these spec callouts: flow range (min-max), accuracy (% of reading), repeatability, pressure rating, wetted materials, electrical output (pulse, analog 0-5V/4-20mA, I2C/SPI), and required power. We label stock items with clear specs so you can Compare Specs side-by-side and avoid ordering mismatches.
| Type | Typical Output | Best for |
|---|---|---|
| Hall-effect turbine | Pulse (frequency) | Water dispensers, hobby irrigation |
| Thermal mass | Digital / mV | Gas dosing, airflow in small ducts |
| Ultrasonic clamp-on | Analog / digital | Non-contact monitoring, maintenance-sensitive systems |
Quick wiring example
Most turbine sensors use three wires: power, ground, and pulse output. Example ASCII wiring for an Arduino-compatible read:
Sensor ArduinoVcc -> 5VGND -> GNDPulse -> digital pin 2 (interrupt)
Use a pull-up resistor if the sensor output is open-collector. For analog or 4-20mA sensors, use an appropriate ADC or a 250 ohm shunt for current-to-voltage conversion.
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