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- Bently Nevada
- 991-01-XX-01-05
- Vibration Transmitter
- USA
- 112 × 38 mm
- 0.45kg
- Xiamen, China
- New & In Stock
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Bently Nevada 991-01-XX-01-05
Comprehensive Product Overview, Technical Specifications, Features, Applications, Advantages, Product Series, and Related Model Recommendations
Product Overview
The 991-01-XX-01-05 is a compact industrial vibration transmitter designed for continuous condition monitoring of rotating machinery. It converts vibration signals collected from machine housings into a standardized 4–20 mA analog output, allowing seamless integration with PLC, DCS, SCADA, and other industrial control systems.
The transmitter is specifically engineered for machinery protection and predictive maintenance applications where reliable vibration measurement is essential. It continuously monitors overall machine vibration, providing operators with real-time information about equipment health and enabling early identification of developing mechanical faults before they result in unexpected shutdowns.
Its rugged construction allows installation in demanding industrial environments where temperature fluctuations, vibration, dust, moisture, and electromagnetic interference are common. The transmitter supports long-term stable operation with minimal maintenance requirements, making it suitable for both new equipment installations and retrofit projects.
The device is widely used in industries requiring high equipment availability, including power generation, oil and gas, petrochemical processing, mining, metallurgy, marine engineering, water treatment, paper manufacturing, cement production, and general industrial automation.
Brand
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Vibration Transmitter |
| Product Type | Industrial Machinery Condition Monitoring |
| Measurement Principle | Housing Vibration Monitoring |
| Output Type | 4–20 mA Current Signal |
| Installation | Direct Machine Mounting |
Product Series
The 991 Series is designed as a family of compact vibration transmitters intended for continuous machinery health monitoring.
The series emphasizes ease of installation, reliable analog signal transmission, long operational life, and compatibility with industrial automation systems.
Typical characteristics of the 991 Series include:
- Continuous vibration monitoring
- Compact industrial housing
- Integrated signal conditioning
- High electromagnetic immunity
- Direct PLC/DCS connectivity
- Low maintenance requirements
- High environmental durability
- Wide industrial compatibility
The series is especially suitable for monitoring:
- Centrifugal pumps
- Electric motors
- Fans
- Blowers
- Compressors
- Gearboxes
- Cooling towers
- Turbines
- Process machinery
- Auxiliary rotating equipment
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 991-01-XX-01-05 |
| Product Type | Industrial Vibration Transmitter |
| Measurement Principle | Velocity Vibration Measurement |
| Output Signal | 4–20 mA Analog |
| Power Supply | 24 VDC (Typical) |
| Frequency Response | Approximately 10 Hz–1 kHz |
| Measurement Direction | Radial |
| Mounting Method | Stud Mount |
| Housing Material | Stainless Steel |
| Electrical Connection | Industrial Connector |
| Protection Rating | IP65 (Typical) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +100°C |
| Accuracy | ±2% Full Scale (Typical) |
| Response Time | Fast Dynamic Response |
| Signal Conditioning | Built-in |
| EMC Performance | High Industrial Immunity |
| Dimensions | Approximately 112 × 38 mm |
| Weight (kg) | Approximately 0.45 kg |
Product Features
The 991-01-XX-01-05 is engineered to provide stable and dependable vibration monitoring for critical industrial equipment operating under continuous service conditions.
Its integrated electronic design combines sensing, signal conditioning, and analog current output into one compact transmitter, reducing installation complexity and minimizing wiring requirements.
The transmitter continuously converts vibration levels into a standardized 4–20 mA signal, making it compatible with virtually every modern industrial automation platform.
Its stainless-steel enclosure provides excellent resistance against corrosion, oil contamination, humidity, and mechanical impact.
Because the device is directly mounted on machinery, it captures vibration information close to the source, improving monitoring accuracy and reducing signal loss.
The robust internal electronics are optimized for long-term stability and low drift, ensuring reliable operation over extended maintenance intervals.
The transmitter is also designed for high electromagnetic compatibility, allowing stable measurements even in environments containing variable frequency drives, high-power motors, and switching equipment.
Product Advantages
High Reliability
Designed for continuous industrial operation, the transmitter delivers stable vibration measurements with minimal maintenance requirements.
Easy Installation
The compact mechanical design enables direct mounting on machinery without requiring complex external signal conditioning equipment.
Excellent System Compatibility
The standard 4–20 mA output allows easy integration into PLC, DCS, SCADA, and distributed monitoring systems.
Fast Fault Detection
Continuous vibration monitoring enables early identification of bearing wear, shaft imbalance, looseness, misalignment, and other mechanical problems before severe damage occurs.
Compact Construction
The transmitter occupies very little installation space, making it ideal for confined equipment layouts.
Rugged Industrial Design
Its durable housing withstands vibration, dust, moisture, oil contamination, and harsh industrial environments.
Low Maintenance Cost
Integrated electronics reduce the number of external components, simplifying maintenance and lowering lifecycle costs.
Long Service Life
Industrial-grade components contribute to long operational life with stable measurement performance over many years.
Typical Applications
The 991-01-XX-01-05 is suitable for a broad range of industrial machinery where continuous vibration monitoring is required.
Typical application equipment includes:
- Centrifugal pumps
- Electric motors
- Industrial fans
- Blowers
- Compressors
- Steam turbines
- Gas turbines
- Gear reducers
- Cooling water pumps
- Boiler feed pumps
- Cooling tower drives
- Paper machine rolls
- Mining conveyors
- Crushers
- Cement production equipment
- Chemical process pumps
- Offshore rotating machinery
- Marine propulsion auxiliary equipment
- Water treatment pumping stations
- HVAC rotating equipment
Its continuous vibration monitoring capability supports predictive maintenance strategies, reducing unexpected downtime while improving equipment availability and maintenance efficiency.
Recommended Models from the Same Series or Related Series
| Model | Product Type | Output | Power Supply | Frequency Range | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 991-01-XX-01-00 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1 kHz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-06-50-01-00 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1 kHz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-25-50-01-00 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1 kHz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 990-05-70-01-00 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1 kHz | Approx. 110 × 38 mm | Approx. 0.43 kg |
| 990-08-50-01-00 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1 kHz | Approx. 110 × 38 mm | Approx. 0.43 kg |
Popular Models from the Same Brand
| Model | Product Type | Main Function | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 3300 XL 8 mm Proximitor Sensor | Proximity Sensor System | Shaft Vibration Monitoring | Approx. 120 × 45 mm | Approx. 0.60 kg |
| 3500/22M Transient Data Interface | Monitoring Module | Dynamic Data Acquisition | Approx. 241 × 24 × 242 mm | Approx. 0.80 kg |
| 3500/42M Proximitor Monitor | Monitoring Module | Shaft Vibration Protection | Approx. 241 × 24 × 242 mm | Approx. 0.85 kg |
| 3500/15 Power Supply Module | System Power Module | Rack Power Supply | Approx. 241 × 50 × 242 mm | Approx. 1.20 kg |
| 3500/40M Proximitor Monitor | Machinery Protection Module | Shaft Position and Vibration Monitoring | Approx. 241 × 24 × 242 mm | Approx. 0.82 kg |
Summary
The 991-01-XX-01-05 is a reliable industrial vibration transmitter developed for continuous machinery condition monitoring. Its compact structure, standardized 4–20 mA output, rugged industrial construction, and long-term operational stability make it well suited for a wide range of rotating equipment.
As part of the 991 Series, it supports predictive maintenance programs by providing continuous vibration data that helps maintenance personnel detect early-stage mechanical issues such as imbalance, misalignment, looseness, and bearing degradation. This enables planned maintenance, minimizes unexpected downtime, improves equipment availability, and extends machinery service life.
Its straightforward installation, strong environmental resistance, broad automation compatibility, and dependable measurement performance make the 991-01-XX-01-05 an effective solution for industrial vibration monitoring in power generation, petrochemical processing, oil and gas, mining, metallurgy, water treatment, marine engineering, pulp and paper production, cement manufacturing, and many other heavy industrial applications.