Why buy data acquisition & logging from Communica
When your project needs accurate measurements - from a final-year lab, an environmental sensor array, or a factory test jig - the right DAQ and logging solution saves hours of setup and months of debugging. Communica stocks a broad range of data acquisition modules, standalone loggers and accessories so you can move from concept to capture with minimal delay. We combine local availability, branch collection options, VAT invoicing for institutions and on-the-ground advice to keep your build on schedule.
Practical benefits for South African users
- Immediate pickup from Samrand, Pretoria CBD or Cape Town branches - avoid long import lead times.
- Stocked brands and categories visible across our Collections to match academic and industrial needs.
- Account quotes and VAT invoices for procurement teams and educational projects.
Typical DAQ choices and where they fit
Choose by channel count, sampling rate, input type and whether you need standalone logging or PC-tethered acquisition. Common scenarios we help with:
- Student labs: low-cost USB DAQ modules or Arduino-compatible ADC shields for voltage, thermistor and simple sensor logging.
- Field monitoring: battery-powered SD-card loggers or cellular-capable loggers for long deployments.
- R&D benches: multi-channel, high-sample-rate modules with anti-aliasing filters and differential inputs.
Quick spec comparison
| Type | Sample Rate | Channels | Best for |
|---|---|---|---|
| USB DAQ module | 1 kS/s - 1 MS/s | 2-16 | Lab benches, PC analysis |
| Standalone SD logger | 1 S/s - 10 kS/s | 1-8 | Field monitoring, low-power |
| Wireless IoT logger | 0.1 S/s - 1 kS/s | 1-6 | Remote sensor networks |
For hands-on browsing of available categories and modules, explore our Collections or view the full product index in All Products. If you want to understand who we are and our service footprint first, visit our About Us.
Selection criteria - what to prioritise
Select a DAQ by matching your measurement needs to these core specs:
- Input type: single-ended vs differential; differential reduces common-mode noise for long runs.
- Sampling rate per channel: follow Nyquist - sample at least twice the highest signal frequency.
- Resolution and accuracy: more bits improve small-signal resolution; check input noise and calibration options.
- Connectivity and logging: decide between PC-tethered USB/Ethernet modules and autonomous SD/cellular loggers for remote sites.
Sample calculation: required sample rate
If you need to capture a 1 kHz PWM motor signal with harmonics to the 5th order, Nyquist says minimum sample rate = 2 × highest frequency. For the 5th harmonic (5 kHz):
Required sample rate = 2 × 5 kHz = 10 kS/s per channel. For cleaner reconstruction, choose 4-10×, so target 40-100 kS/s per channel.
