Flow Sensors Supplier: Why Local Stock Matters
Finding the right flow sensor quickly can keep your project schedule, lab course or production line on track. As a leading local distributor of sensors and development hardware, Communica offers practical advantages: immediate collection from Samrand or Pretoria branches, VAT invoices for institutional purchases, and short-lead alternatives when supply tightness occurs. If you need components for fluid control, irrigation telemetry, HVAC monitoring or lab experiments, sourcing locally reduces transit delays and eases troubleshooting.
Typical flow sensor families we stock
- Electromagnetic (for conductive liquids)
- Turbine and paddlewheel (mechanical, low-cost metering)
- Ultrasonic (non-invasive clamp-on options)
- Mass flow sensors (for gases, often with digital outputs)
- Thermal flow meters and differential-pressure-based transmitters
Each family has trade-offs in accuracy, pressure rating, and installation complexity - we help you match sensor type to the application rather than pushing a single product. See our product categories for sensors and related parts to compare options: flow-sensors.
Specification callouts every buyer should check
| Spec | Why it matters | Typical range |
|---|---|---|
| Flow range | Choose sensor span to cover expected min/max without losing resolution | mL/min to 500+ L/min |
| Accuracy / repeatability | Impacts control stability and calibration frequency | ±0.5% to ±5% |
| Output type | Analog (4-20 mA, 0-10 V) or digital (pulse, RS485, I2C) | Depends on controller interface |
| Fluid compatibility | Material wetted and conductivity determine sensor choice | Water, oils, gases, corrosive fluids |
If you want to browse stock across brands we carry, our brand index helps narrow options by manufacturer and sensor type: flow-sensors-in-stock-south-africa.
Specification callout: wiring and outputs
Most turbine and paddlewheel sensors output a frequency or pulse train proportional to flow. For microcontroller projects, use the pulse constant (Hz per L/min) and an interrupt-capable input. For industrial integration, select 4-20 mA variants and ensure your PLC or data logger supplies the loop power.
Wiring example (3-wire pulse turbine):+12V ----------+ VccSignal (pulse) ---> MCU digital input (with pull-down)GND ----------+ Ground
Need a quick parts list or a quote for classroom kits? We can assemble sensor + filter + fittings bundles tailored to your course or project - request a flow-sensors-quote to include VAT invoicing and branch collection options.
