Product Overview
Unexpected machinery failures cause costly downtime. The Bently Nevada 990-05-70-03-01 990 Vibration Transmitter delivers continuous monitoring, enabling predictive maintenance and extending equipment life. This industrial automation module directly accepts a 3300 NSv proximity probe and outputs a 4-20 mA signal proportional to shaft vibration amplitude over a 0-5 mils peak-to-peak (0-125 μm) full-scale range. Built for reliability in hazardous environments (CSA Division 2), it integrates seamlessly into existing control systems.
Key Technical Specifications
| Parameter |
Value |
| Full-scale Range |
0-5 mils pp (0-125 μm pp) |
| System Length |
7.0 meters (23.0 feet) |
| Mounting |
DIN clips and screws |
| Agency Approval |
CSA Division 2 |
| Power Supply |
+12 to +35 Vdc at transmitter terminal |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| 4-20 mA Loop Accuracy |
Within ±1.5% over full scale (plus probe scale factor error) |
| Frequency Response |
5 Hz to 6,000 Hz (+0, -3 dB) |
| Weight |
0.43 kg (0.9 lbm) |
Industry Applications
The 990-05-70-03-01 excels in monitoring critical rotating machinery such as steam turbines, centrifugal compressors, pumps, and fans across oil and gas, power generation, and pulp & paper industries. Its fast NOT OK/signal defeat response (output drops below 3.6 mA within 100 μs) immediately alerts operators to probe or system faults, preventing false shutdowns and protecting assets. By catching early vibration changes, plants avoid catastrophic failures and reduce unplanned downtime – directly improving ROI.
Reliability and Maintenance Benefits
The Bently Nevada 990-05-70-03-01 includes non-interacting zero and span adjustments, simplifying calibration. The current limiting at 23 mA typical protects loop wiring. With a probe gap requirement of 0.5 to 1.75 mm (20 to 55 mils), proper installation ensures accurate readings. The module's self-diagnostic NOT OK function reduces maintenance effort – no false alarms. Over the transmitter's service life, lower inspection frequency and faster fault isolation translate to significant cost savings.
Selection Guide
Before purchasing the 990-05-70-03-01, verify your probe and cable compatibility: it accepts one 3300 NSv proximity probe with extension cable. Confirm system length (7.0 meters) and mounting option (DIN clips/screws). For assistance with configuration or accessories, contact PLC Source PRO – your reliable source for Bently Nevada spares. We stock this exact model for immediate shipment.