Manufacturer: Bently Nevada
Product No.: 990-04-50-01-05
Country of origin:United States
Product Type: Vibration Transmitter
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 820g
Dimensions: 53.3 mm x 73.9 mm x 100.1 mm
Shipping port: Xiamen
Warranty: 12 months
The 990 vibration transmitter provides a simplified vibration measurement interface for rotating machinery by converting proximity probe displacement into a standardized 4–20 mA output signal. It is designed for OEM applications where vibration indication is required for control system logic rather than full condition monitoring.
This configuration (990-04-50-01-00) is optimized for short system installation using a 5.0 meter probe cable and DIN rail mounting structure. It operates as a loop-powered device and integrates signal conditioning internally, reducing external instrumentation requirements.
The measurement principle is based on proximity probe displacement, processed into peak-to-peak vibration amplitude suitable for trend-based machinery protection.
| Parameter | Selection |
|---|---|
| Model | 990 Vibration Transmitter |
| Full-scale Range | 0–4 mils pp |
| System Length | 5.0 m |
| Mounting Type | 35 mm DIN rail clips |
| Approval Option | CSA / ATEX / maritime variant |
| Parameter | Value |
|---|---|
| Supply Voltage | +12 to +35 Vdc |
| Output Signal | 4–20 mA proportional vibration |
| Loop Resistance | 1000 ohm max (including cable) |
| Current Limiting | 23 mA typical |
| Input Source | 3300 NSv proximity probe system |
| Parameter | Value |
|---|---|
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Minimum Target Size | 9.5 mm |
| Housing Type | DIN rail mounted module |
| Dimensions (H×W×D) | 53.3 × 73.9 × 100.1 mm |
| Condition | Value |
|---|---|
| Operating Temperature | -35 C to +85 C |
| Storage Temperature | -51 C to +100 C |
| Humidity | 100% condensing (non-submerged) |
DIN rail installation requires stable panel grounding to ensure signal integrity under industrial noise environments. Cable routing should avoid high voltage conductors to reduce electromagnetic interference.
Probe gap must be set within specified range to maintain linear measurement response. System commissioning should verify stable loop current before enabling alarm logic in control systems.
| Terminal | Function |
|---|---|
| LOOP + | Power + 4–20 mA output |
| COM | Signal reference |
| PROX OUT | Raw vibration diagnostic signal |
What type of signal does this transmitter output?
It provides a 4–20 mA signal proportional to vibration amplitude.
Can it operate without external signal conditioning?
Yes, signal conditioning is fully integrated inside the device.
What mounting method is used?
This version uses standard 35 mm DIN rail mounting.
What is the probe system requirement?
It works with the Bently Nevada 3300 NSv proximity probe system.
Is it suitable for full vibration diagnostics?
No, it is intended for trend-level monitoring and protection logic.
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Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Greyish White
|
| Country of origin |
United States
|
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