Description
The Bently Nevada 990-05-50-02-00 is a 2-wire, loop-powered vibration transmitter from the Bently Nevada 990 series, designed to provide continuous machinery vibration monitoring as a proportional 4-20 mA signal to PLC, DCS, or machinery control systems. As an integrated transmitter with a built-in Proximitor sensor, the 990-05-50-02-00 accepts input from a 3300 NSv proximity probe and extension cable, conditioning the signal into peak-to-peak vibration amplitude without requiring an external signal driver .
Application Scenarios
In centrifugal air compressor applications, clearance between the probe and the compressor shaft is often measured in millimeters, leaving virtually no room for bulky external Proximitor sensor housings. A common challenge for OEMs and plant engineers is finding a vibration monitoring solution that fits within these tight constraints while still delivering reliable, calibrated data to the control system. The 990-05-50-02-00 addresses this by integrating the Proximitor sensor directly into the transmitter housing, eliminating the external driver that would otherwise occupy valuable cabinet or machine-mount space . Its 2-wire loop-powered design means the same pair of wires carries both power and signal, reducing wiring complexity and installation cost—a significant advantage when retrofitting monitoring onto existing machinery where spare cable runs are limited .
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 990-05-50-02-00 |
| Manufacturer | Bently Nevada |
| Product Category | 2-Wire Vibration Transmitter |
| Input Compatibility | 3300 NSv Proximity Probe + Extension Cable |
| Full-Scale Range | 0-5 mils pp (0-125 µm pp) |
| System Length | 5.0 meters (16.4 feet) |
| Mounting Option | Bulkhead screws |
| Power Supply | +12 to +35 Vdc at transmitter terminal |
| Output Signal | 4-20 mAdc, 2-wire configuration |
| Loop Accuracy | ±1.5% over full-scale range |
| Probe Gap | 0.5 to 1.75 mm (20 to 55 mils) |
| Max Loop Resistance | 1,000 Ω including cable at 35 Vdc |
| Frequency Response | 5 Hz to 6,000 Hz +0, -3 dB |
| Operating Temperature | -35°C to +85°C (-31°F to +185°F) |
| Relative Humidity | 100% condensing, non-submerged |
| Dimensions | Approximately 100 × 73.9 × 53.3 mm |
| Weight | Approximately 0.43 kg (0.9 lb) |