Manufacturer: Bently Nevada
Product No.: 990-05-70-01-00
Country of origin:Stany Zjednoczone
Product Type: 990 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 Bently Nevada 990-05-70-01-00 is a compact vibration transmitter designed for continuous monitoring of rotating machinery in industrial process systems. It converts shaft vibration signals from a compatible 3300 NSv proximity probe into a standard 4 to 20 mA output suitable for direct connection to PLC, DCS, and machine protection platforms.
This configuration uses a 7.0 metre transducer system and supports installations where extended probe cable routing is required between the machine casing and control cabinet. The integrated signal conditioning electronics simplify field installation by eliminating the need for a separate external proximitor assembly.
The transmitter housing is fully potted to improve reliability in humid environments commonly found around compressors, pumps, and auxiliary process equipment. A dedicated PROX OUT connection is also available for temporary vibration analysis and diagnostic measurements during maintenance activities.
Factory calibration adjustments are accessible beneath the transmitter label, allowing field technicians to fine-tune loop output without disassembling the enclosure.
| Equipment Type | Monitoring Purpose |
|---|---|
| Centrifugal compressors | Radial shaft vibration |
| Industrial motors | Bearing vibration trending |
| Process pumps | General machine condition monitoring |
| Fans and blowers | Rotating assembly protection |
| OEM machinery skids | Integrated vibration feedback |
| Utility systems | Predictive maintenance programs |
| Option | Description |
|---|---|
| Model | 990 - Vibration Transmitter |
| Full-scale Option | 05 - 0-5 mils pp (0-125 um pp) |
| System Length Option | 70 - 7.0 metres (23.0 feet) |
| Mounting Option | 01 - 35 mm DIN rail clips |
| Agency Approval Option | 00 - Not required |
| Item | Specification |
|---|---|
| Part Number | 990-05-70-01-00 |
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Condition | New and Original in Factory Packing |
| Factory Warranty | 12 Months |
| Country of Origin | U.S.A |
| Input Device | 3300 NSv proximity probe |
| Signal Type | 4 to 20 mAdc |
| Power Requirement | +12 to +35 Vdc |
| Wiring Method | 2-wire loop powered |
| Full-scale Accuracy | +/-1.5% |
| Current Limiting | 23 mA typical |
| Frequency Response | 5 Hz to 6000 Hz |
| Probe Gap Requirement | 0.5 to 1.75 mm |
| Maximum Loop Resistance | 1000 Ohm |
| Relative Humidity | 100% condensing |
| Operating Temperature | -35 degC to +85 degC |
| Storage Temperature | -52 degC to +100 degC |
| Probe Operating Temperature | -52 degC to +177 degC |
| Probe Material | AISI 303 or 304 stainless steel |
| Cable Construction | 75 Ohm coaxial FEP insulated |
| Net Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Dimensions | 53.3 mm x 73.9 mm x 100.1 mm |
| Connection | Purpose |
|---|---|
| PROX OUT | Dynamic vibration output |
| COM | Signal common |
| TEST Input | Loop verification |
| DC Power Input | Transmitter supply voltage |
| 4-20 mA Output | Process control signal |
Install the transmitter on a properly grounded DIN rail inside a protected control enclosure. Maintain separation between transducer wiring and high-voltage power cables to reduce electrical interference.
Probe target gap should be verified before startup to ensure proper linear response. When using portable analyzers or oscilloscopes for diagnostics, isolated test equipment is recommended for the PROX OUT connection.
The encapsulated housing supports high-humidity operation, but exposed connectors should still be protected from standing moisture and direct washdown conditions.
Avoid excessive thread engagement during probe installation. Over-tightening may cause mechanical binding inside threaded mounting locations.
What does the transmitter measure?
It measures shaft vibration from a compatible proximity probe system and converts the signal into a 4 to 20 mA output.
Which probe system is required?
The transmitter is designed for Bently Nevada 3300 NSv probe assemblies.
Does this version include hazardous area approvals?
No. The -00 approval option indicates standard non-hazardous configuration.
What mounting hardware is included?
This model includes 35 mm DIN rail clips.
Can the unit connect directly to a PLC?
Yes. The analog output is intended for PLC and DCS analog input channels.
Is the transmitter loop powered?
Yes. It operates from a two-wire loop-powered circuit.
What is the supported cable system length?
This version uses a 7.0 metre transducer system.
Can technicians access raw vibration signals?
Yes. The PROX OUT connection provides dynamic signal access for diagnostics.
What happens during a probe failure?
The output drops below 3.6 mA to indicate a NOT OK condition.
Is field calibration supported?
Yes. Zero and span adjustments are accessible externally.
What environments is the housing designed for?
The potted construction supports high-humidity industrial environments.
Can the transmitter perform vibration phase analysis?
No. The 4 to 20 mA output is intended for overall vibration trending only.
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