Counters & Tachometers: Practical tools for measurement and control
Find digital counters and tachometers that work in your workshop, lab or production line - not just a catalogue entry. Communica stocks a wide range of panel meters, handheld tachs, encoder counters and DIN-rail hour meters so you can measure speed, count events or log machine runtime with confidence. We focus on components and instruments that are easy to integrate into South African projects: clear specs, local delivery or branch pickup, VAT invoices for procurement and student-friendly pricing where possible.
Why buy locally from Communica?
- Immediate access to in-stock models at Samrand and other branches - check availability for pickup in Samrand, Pretoria CBD or Cape Town.
- Practical application notes and wiring guidance specific to common workshops and labs.
- Account quotes and VAT invoicing for departmental and procurement needs.
Whether you need a panel counter for a test jig, a handheld tachometer for field calibration, or an encoder counter for a robotics project, start by matching the measurement range, input type and update rate to your application. For a quick browse of parts and categories, see our collections page and our full product index All Products.
Key specs to check before you buy
Don’t judge a meter by its faceplate. Match these specifications to your use case:
| Spec | Why it matters | Typical values |
|---|---|---|
| Input type | Defines compatibility with sensors (NPN/PNP, open-collector, TTL, AC pickup) | Pulse, contact, 0-24V, 4-20mA (with converter) |
| Max pulse rate | Limits top measurable RPM; avoid aliasing | 1 kHz typical; high-speed up to 100 kHz |
| Resolution / digits | Counting range and display readability | 4-8 digits |
| Mounting | Panel cut-out or handheld/bench | 48×48 mm panel, DIN-rail, handheld |
Want brand options? Browse our shop by brand to compare trusted sensors and instrument makers here. For branch times and same-day collection planning, check our branches information here.
Quick selection guidance (real scenarios)
Scenario A - Student motor lab: choose a 4-6 digit panel tachometer with a max pulse rate of 5 kHz and a contact or hall-sensor input. Scenario B - Prototype conveyor counter: choose a DIN-rail counter with relay output and NPN/PNP input to trigger downstream actuators. Scenario C - Field service: choose a handheld laser tachometer for non-contact RPM checks up to 20,000 RPM.
