Introduction to the Bently Nevada 990-08-50-01-01
When machinery health monitoring demands precise vibration measurement, the Bently Nevada 990-08-50-01-01 990 Vibration Transmitter delivers reliable performance. This Industrial Automation Module accepts one non-contacting 3300 NSv Proximity Probe to convert shaft vibration into a standard 4-20 mA signal. Manufactured in the U.S.A., it features a CSA Division 2 rating for hazardous area locations.
Technical Specifications
| Parameter |
Value |
| Full-scale Option |
08: 0-8 mils pp (0-200 µm pp) |
| System Length Option |
50: 5.0 meters (16.4 feet) |
| Mounting Option |
01: 35 mm DIN rail clips |
| Agency Approval |
01: CSA Division 2 |
| Input |
Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| Output Signal |
4 to 20 mAdc over full-scale range, 2-wire configuration |
| Loop Accuracy |
Within ±1.5% over full-scale range (at 250 Ω load) |
| Probe Gap Range |
0.5 to 1.75 mm (20 to 55 mils) |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| NOT OK Signal Defeat |
Output < 3.6 mA within 100 µs; restores within 2-3 seconds |
| Frequency Response |
5 Hz to 6,000 Hz +0, -3 dB |
| Minimum Target Size |
9.5 mm (0.375 in) diameter |
| Leadwire Length (Proximitor Output) |
Maximum 3 meters (10 feet) |
| Weight |
0.43 kg (0.9 lbm) |
Real-World Applications for the Bently Nevada 990-08-50-01-01
The Bently Nevada 990-08-50-01-01 excels in monitoring rotating machinery such as steam turbines, centrifugal compressors, and large pumps. Its fast-acting NOT OK signal defeat (less than 3.6 mA within 100 µs) provides immediate fault indication, reducing downtime risk. In hazardous areas classified as CSA Division 2, this transmitter delivers uninterrupted vibration data.
Installation and Setup Guidance
Mount the Bently Nevada 990-08-50-01-01 using the included 35 mm DIN rail clips. Apply +12 to +35 Vdc power to the transmitter terminals. Connect the 3300 NSv Proximity Probe and ensure the probe gap is between 0.5 and 1.75 mm from the target. The maximum cable distance from the proximitor sensor output (BNC) is 3 meters. Non-interacting zero and span adjustments simplify calibration.
Selection Guide and Purchasing Advice
When ordering the Bently Nevada 990-08-50-01-01, verify the full-scale option (08 for 0-8 mils pp) and system length (50 for 5.0 meters). The agency approval option 01 is required for CSA Division 2 installations. PLC Source PRO (ubest101) supplies genuine Bently Nevada 990-08-50-01-01 modules. Confirm your existing probe and cable compatibility before purchase.