The 990-04-50-02-00 is a compact loop-powered vibration transmitter used to convert proximity probe displacement into a standard 4 to 20 mA signal for industrial monitoring systems. It is designed for applications where vibration data is required for continuous trend observation and basic protection logic rather than full waveform diagnostics.
This version uses a bulkhead screw mounting arrangement, which is often preferred in control panel designs where direct enclosure mounting is required. In practice, engineers choose this type when they want a rigid installation point that reduces mechanical movement and simplifies wiring routing inside tight cabinets.
The device operates with a 3300 NSv proximity probe system and supports a 5.0 meter system length. This configuration is commonly applied in compressor packages, pump systems, and fan assemblies where probe installation distance is moderate and routing is straightforward.
The design focus is operational simplicity: once installed and commissioned, it typically runs continuously with minimal adjustment.
| Equipment Type | Typical Use |
|---|---|
| Centrifugal compressors | Shaft vibration trending into PLC |
| Industrial pumps | Bearing condition monitoring |
| Cooling fans | Mechanical imbalance detection |
| OEM skid systems | Embedded vibration input |
| Auxiliary rotating machinery | Alarm and shutdown logic input |
| Process support equipment | Continuous condition tracking |
| Segment | Code Description |
|---|---|
| Model | 990 Vibration Transmitter |
| Full-scale Option | 04 = 0–4 mils pp (0–100 µm pp) |
| System Length Option | 50 = 5.0 meters (16.4 feet) |
| Mounting Option | 02 = Bulkhead screws |
| Agency Option | 00 = Not required |
| Item | Specification |
|---|---|
| Part Number | 990-04-50-02-00 |
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Minimum Target Size | 9.5 mm (0.375 in) |
| Dimensions (H x W x D) | 53.3 mm x 73.9 mm x 100.1 mm |
| Body Height (without DIN clip) | 42.6 mm |
| Mounting Hole Distance | 63.5 mm x 69.9 mm |
| Mounting Hole Diameter | 5.8 mm |
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Mounting Hardware | 4 × bulkhead holes, 6-32 x 1.326 screws provided |
| Interface | Function |
|---|---|
| Probe Input | Connection to 3300 NSv proximity probe system |
| 4–20 mA Output | Vibration signal to PLC/DCS |
| Power Input | Loop-powered DC supply |
| PROX OUT | Raw vibration diagnostic output |
| COM | Signal reference |
Bulkhead mounting is typically selected when the panel layout requires a fixed and mechanically stable installation point. The four-point fixation reduces vibration-induced loosening, which can be a concern in compressor or pump skid environments.
In practical wiring design, probe signal routing should be separated from high-voltage or high-current conductors. This helps avoid induced noise, especially when cable runs are bundled inside compact enclosures.
Before commissioning, verify probe gap alignment and confirm loop current stability under steady machine operation. Engineers usually delay alarm logic activation until the signal behavior is confirmed under real operating conditions.
PROX OUT is mainly used during maintenance or diagnostic checks rather than continuous monitoring in production.
Why is bulkhead mounting used in this model?
It provides a rigid enclosure-mounted installation with better mechanical stability.
Are mounting screws included?
Yes, 6-32 x 1.326 screws are provided when the mounting option is specified.
What is the main function of this transmitter?
It converts vibration from a proximity probe into a 4–20 mA signal.
Can it be used with PLC systems?
Yes, it is designed for direct PLC and DCS analog input integration.
What probe system is required?
It is designed for Bently Nevada 3300 NSv proximity probes.
Is this suitable for compressor applications?
Yes, it is commonly used on compressors, pumps, and fans.
Does it support vibration diagnostics?
It provides PROX OUT for basic diagnostic signal access.
Is it a full monitoring system?
No, it is a simplified vibration transmitter for trend-level monitoring.
What happens if the probe fails?
The output current drops to indicate a fault condition.
Where is it typically installed?
Inside control cabinets or skid-mounted equipment panels.
Global Express Shipping
Returns & Warranty
Manufacturer: Bently Nevada
Product No.: 990-04-50-02-00
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 990-04-50-02-00 is a compact loop-powered vibration transmitter used to convert proximity probe displacement into a standard 4 to 20 mA signal for industrial monitoring systems. It is designed for applications where vibration data is required for continuous trend observation and basic protection logic rather than full waveform diagnostics.
This version uses a bulkhead screw mounting arrangement, which is often preferred in control panel designs where direct enclosure mounting is required. In practice, engineers choose this type when they want a rigid installation point that reduces mechanical movement and simplifies wiring routing inside tight cabinets.
The device operates with a 3300 NSv proximity probe system and supports a 5.0 meter system length. This configuration is commonly applied in compressor packages, pump systems, and fan assemblies where probe installation distance is moderate and routing is straightforward.
The design focus is operational simplicity: once installed and commissioned, it typically runs continuously with minimal adjustment.
| Equipment Type | Typical Use |
|---|---|
| Centrifugal compressors | Shaft vibration trending into PLC |
| Industrial pumps | Bearing condition monitoring |
| Cooling fans | Mechanical imbalance detection |
| OEM skid systems | Embedded vibration input |
| Auxiliary rotating machinery | Alarm and shutdown logic input |
| Process support equipment | Continuous condition tracking |
| Segment | Code Description |
|---|---|
| Model | 990 Vibration Transmitter |
| Full-scale Option | 04 = 0–4 mils pp (0–100 µm pp) |
| System Length Option | 50 = 5.0 meters (16.4 feet) |
| Mounting Option | 02 = Bulkhead screws |
| Agency Option | 00 = Not required |
| Item | Specification |
|---|---|
| Part Number | 990-04-50-02-00 |
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Minimum Target Size | 9.5 mm (0.375 in) |
| Dimensions (H x W x D) | 53.3 mm x 73.9 mm x 100.1 mm |
| Body Height (without DIN clip) | 42.6 mm |
| Mounting Hole Distance | 63.5 mm x 69.9 mm |
| Mounting Hole Diameter | 5.8 mm |
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Mounting Hardware | 4 × bulkhead holes, 6-32 x 1.326 screws provided |
| Interface | Function |
|---|---|
| Probe Input | Connection to 3300 NSv proximity probe system |
| 4–20 mA Output | Vibration signal to PLC/DCS |
| Power Input | Loop-powered DC supply |
| PROX OUT | Raw vibration diagnostic output |
| COM | Signal reference |
Bulkhead mounting is typically selected when the panel layout requires a fixed and mechanically stable installation point. The four-point fixation reduces vibration-induced loosening, which can be a concern in compressor or pump skid environments.
In practical wiring design, probe signal routing should be separated from high-voltage or high-current conductors. This helps avoid induced noise, especially when cable runs are bundled inside compact enclosures.
Before commissioning, verify probe gap alignment and confirm loop current stability under steady machine operation. Engineers usually delay alarm logic activation until the signal behavior is confirmed under real operating conditions.
PROX OUT is mainly used during maintenance or diagnostic checks rather than continuous monitoring in production.
Why is bulkhead mounting used in this model?
It provides a rigid enclosure-mounted installation with better mechanical stability.
Are mounting screws included?
Yes, 6-32 x 1.326 screws are provided when the mounting option is specified.
What is the main function of this transmitter?
It converts vibration from a proximity probe into a 4–20 mA signal.
Can it be used with PLC systems?
Yes, it is designed for direct PLC and DCS analog input integration.
What probe system is required?
It is designed for Bently Nevada 3300 NSv proximity probes.
Is this suitable for compressor applications?
Yes, it is commonly used on compressors, pumps, and fans.
Does it support vibration diagnostics?
It provides PROX OUT for basic diagnostic signal access.
Is it a full monitoring system?
No, it is a simplified vibration transmitter for trend-level monitoring.
What happens if the probe fails?
The output current drops to indicate a fault condition.
Where is it typically installed?
Inside control cabinets or skid-mounted equipment panels.
Global Express Shipping
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
|
| Power source |
DC Power
|
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