Product Introduction
When unexpected machinery vibration threatens production uptime, the Bently Nevada 990-08-70-02-01 990 Vibration Transmitter provides early warning. This industrial automation module converts proximity probe signals into a 4-20 mA output for real-time monitoring. Designed for hazardous environments, it delivers reliable performance where vibration detection is critical.
Technical Specifications
The Bently Nevada 990-08-70-02-01 operates with precise parameters derived from its datasheet:
| Parameter |
Value |
| Full-scale Range |
0-8 mils pp (0-200 μm pp) |
| Input |
1 non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Supply |
+12 to +35 Vdc input at transmitter terminal |
| 4-20 mA Output |
4-20 mAdc over full-scale range in 2-wire configuration |
| Loop Accuracy |
±1.5% over full-scale range (adds to Prox Out Incremental Scale Factor) |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| Frequency Response |
5 Hz to 6,000 Hz +0, 3 dB |
| Probe Gap Range |
0.5 to 1.75 mm (20 to 55 mils) |
| Weight |
0.43 kg (0.9 lbm) |
| Agency Approval |
CSA Division 2 |
The Bently Nevada 990-08-70-02-01 includes non-interacting zero and span adjustments, and a NOT OK signal defeat that pulls output below 3.6 mA within 100 μs on fault, restoring within 2-3 seconds after clearance.
Real-World Applications
This Bently Nevada 990-08-70-02-01 excels in rotating machinery protection. Use it on pumps, fans, compressors, and turbines where early vibration detection prevents catastrophic failure. In a chemical processing plant, the transmitter monitors bearing wear and imbalance, triggering alerts before unplanned downtime. Its CSA Division 2 rating suits installations near flammable vapors.
Maintenance & Reliability
Routine checks of the probe gap and cable connections ensure the Bently Nevada 990-08-70-02-01 maintains accuracy. The 23 mA current limiting protects the loop, while the ±1.5% accuracy supports reliable trend analysis. With proper gap setting between 0.5 and 1.75 mm, this module delivers consistent performance over years of service.
Selection Guide & Purchasing Advice
Before ordering, verify your probe type (3300 NSv) and cable length (7.0 meters included). Your system must provide +12 to +35 Vdc at the transmitter. For expert support, contact PLC Source PRO (ubest101). We supply genuine Bently Nevada 990-08-70-02-01 modules ready for critical installations.