Should I Use Wireless or Wired Vibration Sensors?
Use wired sensors for critical assets requiring continuous, high-frequency monitoring. Use wireless sensors for non-critical assets, difficult-to-access locations, and expanding coverage affordably. The best Ontario plants use both — a hybrid approach that puts wired sensors on the 20% of assets that cause 80% of downtime, and wireless sensors on everything else. Wired sensors cost 2-3x more to install but provide 100x the data resolution. Wireless sensors deploy in minutes but sample less frequently.
Talk to our instrumentation engineers about the right mix for your plant.
Head-to-Head Comparison
| Factor | Wired Sensors | Wireless Sensors | |---|---|---| | Sampling rate | 25,600-102,400 Hz (continuous) | 800-25,600 Hz (periodic) | | Data frequency | Real-time (every second) | Scheduled (every 1-24 hours) | | Battery life | N/A (powered by cable) | 3-5 years typical | | Installation cost | CAD $800-$2,500 per point | CAD $300-$800 per point | | Installation time | 4-8 hours (cable routing) | 15-30 minutes (mount + pair) | | Reliability | 99.9%+ (no battery, no wireless) | 95-98% (battery, signal dependent) | | Hazardous areas | Requires intrinsically safe barriers | Many models are ATEX/CSA certified | | Data resolution | Full spectrum + waveform | Often limited to overall values | | Ideal for | Critical assets, 24/7 monitoring | Expansion, balance-of-plant |
When Wireless Wins
- Remote or hard-to-access locations — cooling tower fans, roof-mounted equipment, offshore platforms
- Rapid expansion — adding 50+ monitoring points without cable routing
- Budget constraints — covering more assets at lower per-point cost
- Temporary monitoring — commissioning, troubleshooting, or trial periods
- Retrofit installations — existing buildings where cable routing is impractical
When Wired Wins
- Critical assets — the 10-20 machines where any failure shuts down production
- High-frequency analysis — detecting early-stage bearing faults requires > 10 kHz sampling
- Continuous monitoring — real-time alerts, not scheduled measurements
- Hazardous environments — where battery replacement poses safety risks
- Integration with protection systems — machine trip on high vibration
The Hybrid Approach
Most Ontario plants we work with deploy a mix: 15-25 wired sensors on their most critical rotating assets (continuous protection) and 50-100 wireless sensors covering balance-of-plant equipment (scheduled condition monitoring). Our manufacturing division builds both types.
Frequently Asked Questions
How often do wireless vibration sensors need battery replacement?
Modern wireless sensors last 3-5 years on a single battery when configured for hourly or daily measurements. More frequent sampling (every 15 minutes) reduces battery life to 1-2 years. Some models offer energy harvesting (solar, vibration) to extend life indefinitely.
Can wireless sensors detect bearing faults as early as wired sensors?
It depends on the sensor's maximum sampling frequency. Wireless sensors sampling at 25,600 Hz can detect bearing faults, but they measure periodically (not continuously). A fault developing between measurement intervals could progress undetected. For critical assets, wired continuous monitoring provides earlier and more reliable detection.
Droz Technologies manufactures and deploys both wired and wireless vibration monitoring systems in Ontario. Talk to an engineer about your monitoring strategy.
