Reliable flow measurement near you
Need a flow sensor today for a lab build, irrigation control or prototype? Communica stocks a wide range of liquid and gas flow sensors and meters from maker-friendly modules to industrial-style sensors, held locally so Cape Town projects don’t stall. Get the components you need with branch pickup, VAT invoices for procurement, and options for account quotes.
Why choose local stock in Cape Town
Local availability cuts lead times and shipping uncertainty. For students and makers, that means faster iteration; for technicians and procurement teams, it means predictable delivery and accurate invoicing. You can check current branch availability and trading hours to pick up same-day from our Cape Town branch or order for delivery across South Africa - see Branches & Trading Hours for local collection windows.
Common sensor families and where they fit
Understand which flow sensor is right for your application before you buy. Popular options we stock include:
- Hall-effect turbine flow sensors - low-cost, great for water flow logging in hobby and irrigation systems.
- Mass flow sensors (thermal) - suited to low-flow gas measurement and lab setups needing fast response.
- Ultrasonic clamp-on meters - non-invasive, good for maintenance checks on existing pipework.
- Vortex and paddlewheel meters - robust for larger pipes and moderate accuracy industrial monitoring.
See our full category listing to compare hardware and parts: Shop by Category. For a brand-specific look, browse Shop by Brand.
Specification callouts to check before purchase
When comparing models, prioritize these measurable specs to match your design requirements:
| Spec | Why it matters |
|---|---|
| Flow range (L/min) | Pick a sensor whose linear range covers your expected minimum and maximum flow. |
| Output type (pulse/analog/I2C) | Ensures compatibility with microcontrollers or data loggers. |
| Accuracy (% of reading) | Higher accuracy for lab work; lower-cost sensors suffice for control loops. |
| Media compatibility | Confirm chemical resistance and temperature limits for liquids or gases used. |
If you want side-by-side spec comparison, use our product index: flow sensors in stock and click Compare Specs to filter models.
Quick wiring note and example
Many common turbine flow sensors output a digital pulse. Use a pull-up to 5V (or 3.3V for 3V devices) and count pulses on an interrupt pin. Basic wiring for a 3-wire sensor:
Vcc ---+ 5VGND ---+ GNDSIG ---+ MCU interrupt pin (with pull-up)
For analog or I2C flow sensors, match ADC input ranges or bus voltage. When in doubt, request a wiring diagram or accessory bundle that includes connectors and mounting hardware during checkout - you can buy flow sensors south africa to start building a parts list.
