The 990 Vibration Transmitter is a loop-powered, two-wire vibration measurement device designed for direct integration with machinery protection or condition monitoring systems in rotating equipment applications such as compressors, pumps, motors, and fans. It converts radial vibration sensed by a 3300 NSv proximity probe system into a proportional 4–20 mA signal representing peak-to-peak vibration amplitude, enabling continuous monitoring at the control system level.
This transmitter is typically applied where simplified vibration indication is required without full diagnostic vibration analysis capability. It incorporates an internal Proximitor-style signal conditioning stage, eliminating the need for an external driver module.
The 990-05-50-01-CN configuration defines a 0–5 mils peak-to-peak measurement range, a 5.0 meter system length, DIN rail mounting hardware, and region-specific approval marking for installation in regulated environments.
A secondary diagnostic output is available via PROX OUT interface, allowing access to raw vibration signal for troubleshooting using compatible test equipment with proper isolation.
| Parameter | Value |
|---|---|
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Model | 990-05-50-01-CN |
| Input | 3300 NSv proximity probe system |
| Output Signal | 4–20 mA proportional vibration |
| Measurement Range | 0–5 mils pp (0–100 µm pp) |
| System Length | 5.0 m (16.4 ft) |
| Power Supply | +12 to +35 Vdc |
| Loop Resistance | Up to 1000 ohm (including cable) |
| Frequency Response | 5 Hz to 6000 Hz |
| Operating Temperature | -35 C to +85 C |
| Storage Temperature | -52 C to +100 C |
| Relative Humidity | 100% condensing (non-submerged) |
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Housing Material | Potted industrial enclosure |
| Probe Case Material | AISI 303 / 304 stainless steel |
| Probe Cable | 75 ohm FEP insulated coaxial |
| Tensile Strength | 222 N (50 lbf) |
| Minimum Target Size | 9.5 mm diameter |
| Connector / Terminal | Function |
|---|---|
| PROX OUT | Raw vibration signal output (diagnostic use) |
| COM | Common reference |
| Loop + | 4–20 mA loop power input/output |
| Test Input | Signal verification input |
Install the transmitter on a stable panel or DIN rail with minimal mechanical vibration influence. Maintain correct probe gap between 0.5 mm and 1.75 mm to ensure linear operation. Use shielded coaxial cable routing for probe signal integrity. Avoid running probe cables parallel to high-voltage power lines to reduce EMI coupling.
For PROX OUT diagnostic usage, apply proper signal isolation when connecting to grounded test instruments. Ensure enclosure sealing is maintained in high humidity environments.
Is this transmitter suitable for vibration diagnostics?
It is designed for basic vibration monitoring and trending, not full diagnostic analysis.
Does it require an external signal conditioner?
No, the signal conditioning is integrated inside the transmitter.
What probe type is supported?
It is designed for use with the 3300 NSv proximity probe system.
Can PROX OUT be used directly on oscilloscope?
Yes, but isolation is recommended when using grounded test equipment.
What happens during probe failure?
The output enters NOT OK condition and drops below 3.6 mA to indicate fault.
Is this suitable for critical turbine monitoring?
No, it is intended for non-critical or auxiliary machinery applications.
Global Express Shipping
Returns & Warranty
Manufacturer: Bently Nevada
Product No.: 990-05-50-01-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 is a loop-powered, two-wire vibration measurement device designed for direct integration with machinery protection or condition monitoring systems in rotating equipment applications such as compressors, pumps, motors, and fans. It converts radial vibration sensed by a 3300 NSv proximity probe system into a proportional 4–20 mA signal representing peak-to-peak vibration amplitude, enabling continuous monitoring at the control system level.
This transmitter is typically applied where simplified vibration indication is required without full diagnostic vibration analysis capability. It incorporates an internal Proximitor-style signal conditioning stage, eliminating the need for an external driver module.
The 990-05-50-01-CN configuration defines a 0–5 mils peak-to-peak measurement range, a 5.0 meter system length, DIN rail mounting hardware, and region-specific approval marking for installation in regulated environments.
A secondary diagnostic output is available via PROX OUT interface, allowing access to raw vibration signal for troubleshooting using compatible test equipment with proper isolation.
| Parameter | Value |
|---|---|
| Manufacturer | Bently Nevada |
| Product Type | 2-Wire Vibration Transmitter |
| Model | 990-05-50-01-CN |
| Input | 3300 NSv proximity probe system |
| Output Signal | 4–20 mA proportional vibration |
| Measurement Range | 0–5 mils pp (0–100 µm pp) |
| System Length | 5.0 m (16.4 ft) |
| Power Supply | +12 to +35 Vdc |
| Loop Resistance | Up to 1000 ohm (including cable) |
| Frequency Response | 5 Hz to 6000 Hz |
| Operating Temperature | -35 C to +85 C |
| Storage Temperature | -52 C to +100 C |
| Relative Humidity | 100% condensing (non-submerged) |
| Transmitter Weight | 0.43 kg |
| Total System Weight | 0.82 kg |
| Housing Material | Potted industrial enclosure |
| Probe Case Material | AISI 303 / 304 stainless steel |
| Probe Cable | 75 ohm FEP insulated coaxial |
| Tensile Strength | 222 N (50 lbf) |
| Minimum Target Size | 9.5 mm diameter |
| Connector / Terminal | Function |
|---|---|
| PROX OUT | Raw vibration signal output (diagnostic use) |
| COM | Common reference |
| Loop + | 4–20 mA loop power input/output |
| Test Input | Signal verification input |
Install the transmitter on a stable panel or DIN rail with minimal mechanical vibration influence. Maintain correct probe gap between 0.5 mm and 1.75 mm to ensure linear operation. Use shielded coaxial cable routing for probe signal integrity. Avoid running probe cables parallel to high-voltage power lines to reduce EMI coupling.
For PROX OUT diagnostic usage, apply proper signal isolation when connecting to grounded test instruments. Ensure enclosure sealing is maintained in high humidity environments.
Is this transmitter suitable for vibration diagnostics?
It is designed for basic vibration monitoring and trending, not full diagnostic analysis.
Does it require an external signal conditioner?
No, the signal conditioning is integrated inside the transmitter.
What probe type is supported?
It is designed for use with the 3300 NSv proximity probe system.
Can PROX OUT be used directly on oscilloscope?
Yes, but isolation is recommended when using grounded test equipment.
What happens during probe failure?
The output enters NOT OK condition and drops below 3.6 mA to indicate fault.
Is this suitable for critical turbine monitoring?
No, it is intended for non-critical or auxiliary machinery applications.
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
Silver
|
| Country of origin |
United States
|
Replacing a 1756-L73 does not automatically mean upgrading its firmware. This guide compares v19.013, v21.011 and v31.011, focusing on project compatibility, HMI communications, legacy networks and...
Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.
Integrate Allen-Bradley CompactLogix, Caterpillar ATS, and generators into DeltaV DCS over Modbus RTU. Covers ProSoft MVI69-MCM, Miille DIN266 gateways.
ONS instruction fires but the OTE coil never latches in Studio 5000 because the one-shot is only true for one scan. Use OTL/OTU or seal-in logic instead.
Configure Allen-Bradley Kinetix 5500 servo drives on EtherNet/IP. Covers CIP Sync, IEEE 1588 V2 timing, Stratix selection, DLR topology, and HMI.
A moving-average filter is the sliding-window smoother most instrument engineers drop into DCS and PLC analog paths. Here is how the window works, how N and sample time set lag, and when a...
