Product Overview: Advanced Vibration Monitoring for Rotating Equipment
The Bently Nevada 990-10-50-01-05 990 Vibration Transmitter is a compact, two-wire, loop-powered vibration monitoring device designed to provide reliable vibration measurement and transmission for industrial rotating machinery. Developed for OEM machinery manufacturers and process industries, this transmitter converts displacement vibration signals from a compatible 3300 NSv proximity probe system into a proportional 4–20 mA output, allowing direct connection to PLC, DCS, SCADA, and machinery control systems.
The 990 series transmitter integrates Proximitor® signal conditioning technology into a compact industrial housing, reducing the need for separate monitoring hardware while maintaining accurate vibration measurement performance. The 990-10-50-01-05 configuration provides a 0–10 mils peak-to-peak (0–250 μm pp) measurement range, a 5-meter transducer system length, DIN rail mounting, and hazardous-area approvals, making it suitable for a wide range of machinery monitoring applications.
Designed for simplicity and dependable operation, this transmitter is commonly installed on centrifugal compressors, pumps, motors, fans, and other rotating equipment where vibration trending and alarm monitoring are required.
Technical Specifications: Engineering Data and Product Details
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 990-10-50-01-05 |
| Product Type | 990 Vibration Transmitter |
| Measurement Range | 0–10 mils peak-to-peak (0–250 μm pp) |
| Input Sensor | 3300 NSv Non-contacting Proximity Probe |
| Transducer System Length | 5.0 m (16.4 ft) |
| Output Signal | 4–20 mA proportional vibration output |
| Power Supply | +12 to +35 VDC |
| Loop Configuration | Two-wire loop powered |
| Mounting Type | 35 mm DIN rail clips |
| Frequency Response | 5 Hz to 6 kHz |
| Proximity Range | 10–65 mils |
| Diagnostic Output | PROX OUT and COM terminals |
| Signal Conditioning | Integrated Proximitor® electronics |
| Agency Approvals | CSA Division 2, ATEX Zone 0, ATEX Zone 2, ABS maritime approval |
| Operating Temperature | -35°C to +85°C |
| Construction | Industrial potted electronics |
| Dimensions | Approx. 100 mm × 74 mm × 53 mm |
| Weight | Approx. 0.5 kg |
Industrial Applications: Built for Continuous Machinery Monitoring
The 990-10-50-01-05 vibration transmitter is designed for applications where operators require a reliable vibration signal without installing a complete rack-based machinery protection system.
| Industry | Typical Equipment |
|---|
| Oil & Gas | Centrifugal compressors, pumps, rotating packages |
| Petrochemical | Process machinery and auxiliary equipment |
| Power Generation | Turbines, motors, generator auxiliaries |
| Manufacturing | Fans, blowers, gearboxes, motors |
| Water Treatment | Large pump systems |
| OEM Machinery | Compressor and skid-mounted equipment |
Typical applications include:
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Continuous vibration monitoring
-
Machinery condition trending
-
Predictive maintenance programs
-
Equipment alarm monitoring
-
PLC/DCS vibration input
-
Rotating equipment health assessment
The transmitter is particularly suitable for OEM applications requiring a simple analog vibration signal for machinery control and protection logic.
Key Advantages: Reliable Performance With Simplified Integration
Integrated Proximitor® Electronics
The built-in Proximitor® technology combines vibration signal conditioning and transmitter functionality in a single compact device. This design reduces wiring complexity, saves cabinet space, and simplifies installation compared with traditional separate sensor and conditioner arrangements.
Wide 10 mil Peak-to-Peak Measurement Range
The “-10” measurement option provides a full-scale vibration range of 0–10 mils pp (0–250 μm pp), making this model suitable for applications requiring a broader vibration monitoring range than standard 5 mil configurations.
5-Meter Transducer System Flexibility
The “-50” system length option provides a 5-meter probe and extension cable configuration, allowing flexible installation between the machinery measurement point and the transmitter location.
DIN Rail Mounting Design
The “-01” mounting option supports 35 mm DIN rail installation, making the transmitter ideal for electrical cabinets, OEM control panels, and machinery monitoring enclosures.
Standard 4–20 mA Industrial Output
The transmitter provides a universally accepted analog output signal, enabling easy connection to existing automation systems without requiring additional signal conversion equipment.
Hazardous Area Compatibility
The “-05” approval option supports industrial installations requiring recognized hazardous-area certifications, including CSA Division 2, ATEX Zone 0, ATEX Zone 2, and ABS maritime approval.
Built-In Diagnostic Access
PROX OUT and COM terminals provide access to dynamic vibration signals and gap voltage information, helping maintenance engineers perform commissioning checks, troubleshooting, and system verification.
Technical FAQs
1. What is the Bently Nevada 990-10-50-01-05 used for?
It is used for monitoring vibration levels of rotating machinery and transmitting vibration data as a 4–20 mA signal to control systems.
2. Which probe is compatible with this transmitter?
The transmitter works with a Bently Nevada 3300 NSv proximity probe and matching extension cable system.
3. What does “10” mean in the model number?
The “10” indicates a full-scale vibration range of 0–10 mils peak-to-peak (0–250 μm pp).
4. What does “50” represent?
The “50” identifies the 5-meter (16.4 ft) transducer system length.
5. What does the “01” mounting option provide?
The “01” option provides 35 mm DIN rail mounting clips for panel installation.
6. What output does this vibration transmitter provide?
It provides a standard 4–20 mA proportional vibration output for PLC, DCS, and SCADA systems.
7. Does the transmitter require an external Proximitor module?
No. The transmitter contains integrated Proximitor® signal conditioning electronics.
8. What power supply is required?
The unit requires a +12 to +35 VDC loop-powered supply.
9. What diagnostic connections are available?
The transmitter provides PROX OUT and COM terminals for vibration signal checking and gap voltage diagnostics.
10. What machines commonly use the 990-10-50-01-05?
Typical applications include compressors, pumps, motors, fans, blowers, and other rotating industrial machinery.
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