Affordable counters & tachometers built for real projects
Looking for cheap counters and tachometers that actually work on your bench, classroom or production floor? Communica stocks compact digital counters, RPM tachometers and panel meters that balance price with useful features: readable displays, common input types (hall, reed, NPN/PNP, TTL), and mounting options that suit education labs and engineering workshops. Local availability means you can avoid long lead times and collect from Samrand or our Pretoria and Cape Town branches.
Why choose locally stocked, budget instruments
Buying locally reduces downtime. When a classroom project needs a replacement tachometer or a prototype requires an extra counter module, same-city pickup and VAT invoicing keep procurement simple. We carry accessories and spare parts - power leads, sensor probes, and panel cutout-friendly housings - so a one-stop visit or single order often solves the whole problem.
Quick compatibility checklist
- Input type: confirm sensor output (open-collector, reed, TTL) matches the counter input.
- Supply voltage: many budget units run 5-12V; check for 24V tolerance if used in industrial settings.
- Display & mounting: panel meter vs handheld - choose for visibility and mounting constraints.
- Range & scaling: ensure RPM/Hz ranges cover your motor or encoder and provide scaling or prescaling if needed.
Compare common spec highlights
Below is a concise spec comparison to speed your decision-making without wading through datasheets.
| Type | Typical Inputs | Supply | Best for |
|---|---|---|---|
| Panel counter | TTL, NPN | 5-12V | Control panels, workshops |
| Handheld tachometer | Optical / contact | Battery | Field checks on motors |
| DIN rail/timer counter | Dry contact, pulse | 12-24V | Industrial control and PLC adjuncts |
Practical example - choosing for a small workshop lathe
If you need to measure spindle RPM on a benchtop lathe with a proximity sensor producing 1 pulse per revolution and expected speeds up to 3,000 RPM, pick a counter with input compatibility for an open-collector sensor, a measurement range to 10,000 RPM (with prescale if necessary), and a readable panel or handheld display. If you prefer to integrate into a control panel, choose a panel-mount counter with 12V supply tolerance and screw terminal inputs.
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