Manufacturer: Bently Nevada
Product No.: 990-05-70-02-CN
Country of origin:United States
Product Type: 990 Vibration Transmitter
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 converts proximity probe displacement into a proportional 4–20 mA vibration signal for continuous monitoring of rotating machinery. It is designed for compact OEM installations where vibration indication is required for control logic rather than full diagnostic analysis.
This configuration (990-05-70-02-CN) uses a bulkhead-mounted housing and supports a 7.0 meter probe system length based on the 3300 NSv proximity probe platform. The measurement output represents peak-to-peak vibration amplitude under steady-state operating conditions.
The transmitter is typically installed close to machinery skid assemblies or panel structures where rigid mounting is preferred. Signal conditioning is fully integrated, eliminating the need for external Proximitor modules.
| Item | Value |
|---|---|
| Model | 990-05-70-02-CN |
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Input | 3300 NSv proximity probe system |
| Output | 4–20 mA vibration signal |
| Full-scale Range | 0–5 mils pp |
| System Length | 7.0 m |
| Item | Value |
|---|---|
| Supply Voltage | +12 to +35 Vdc |
| Loop Configuration | 2-wire loop powered |
| Maximum Loop Resistance | 1000 ohm |
| Item | Value |
|---|---|
| Operating Temperature | -35 C to +85 C |
| Storage Temperature | -51 C to +100 C |
| Humidity | 100% condensing (non-submerged) |
| Item | Value |
|---|---|
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Minimum Target Size | 9.5 mm |
| Housing Style | Bulkhead mounted enclosure |
| Terminal | Function |
|---|---|
| LOOP + | 4–20 mA output / power input |
| COM | Signal reference |
| PROX OUT | Raw vibration signal for diagnostics |
| TEST | Loop verification input |
The transmitter is intended for rigid mounting using bulkhead screw fixation. Installation should ensure stable mechanical coupling between enclosure and mounting surface to avoid resonance-induced signal variation.
Probe cable routing must avoid parallel alignment with high-power conductors to reduce EMI coupling. Shield termination should be implemented at a single grounding point.
During commissioning, verify probe gap alignment and confirm stable loop current under normal machine operating conditions before enabling alarm logic in the control system.
What is the main function of this transmitter?
It converts proximity probe vibration into a 4–20 mA signal for monitoring systems.
What probe system is required?
It is designed for the Bently Nevada 3300 NSv probe system.
What does the bulkhead mounting provide?
It allows rigid installation directly onto panels or machine skids.
Is this a diagnostic vibration system?
No, it is intended for trend-level monitoring only.
What is PROX OUT used for?
It provides raw vibration signal access for maintenance diagnostics.
What happens if a probe fault occurs?
The output drops to indicate a NOT OK condition.
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| Color pattern |
Greyish White
|
| Country of origin |
United States
|
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