Comprehensive Product Overview, Technical Specifications, Features, Applications, Advantages, Series Information, and Recommended Models
Product Overview
The Bently Nevada 991-01-XX-01-05 284318-01 is an industrial vibration transmitter designed for continuous condition monitoring of rotating machinery. It combines vibration sensing, signal conditioning, and analog signal transmission into a compact, field-mounted device that provides reliable vibration measurements for machinery health monitoring systems.
This model is intended for applications where continuous vibration monitoring is required to support predictive maintenance programs and equipment protection strategies. It converts measured vibration levels into a standard 4–20 mA analog output, allowing direct integration with PLCs, DCS platforms, SCADA systems, industrial controllers, and other automation equipment without requiring additional signal converters.
Its compact construction allows installation directly on machine bearing housings or other suitable mounting locations, enabling accurate measurement of machine casing vibration. The rugged industrial design ensures dependable operation in demanding environments where vibration, moisture, dust, oil contamination, and electromagnetic interference are common.
The 284318-01 configuration belongs to the 991 Series and is suitable for monitoring a wide variety of rotating equipment operating continuously in industrial facilities. The transmitter provides stable long-term performance while reducing maintenance complexity through its integrated electronic design.
The device is widely selected for condition monitoring projects because it offers dependable operation, straightforward installation, and compatibility with most industrial monitoring architectures. It contributes to improved equipment availability, reduced maintenance costs, and increased operational reliability by providing continuous vibration data for machinery diagnostics.
Brand
| Item |
Description |
| Brand |
Bently Nevada |
| Product Category |
Industrial Vibration Transmitter |
| Product Type |
Housing Vibration Monitoring Device |
| Measurement Technology |
Integrated Velocity Measurement |
| Signal Output |
Standard 4–20 mA Current Output |
| Installation Method |
Direct Machine Mounting |
Product Series
The 991 Series is a family of compact industrial vibration transmitters developed specifically for machinery condition monitoring and predictive maintenance applications.
The series is characterized by integrated signal processing, standardized analog outputs, compact mechanical dimensions, robust industrial construction, and long operational stability.
Products within this series are designed to simplify vibration monitoring installations while providing dependable performance in harsh industrial environments.
Typical monitoring applications include:
- Centrifugal pumps
- Electric motors
- Cooling tower drives
- Industrial fans
- Blowers
- Gearboxes
- Compressors
- Steam turbines
- Gas turbines
- Process machinery
- Auxiliary rotating equipment
- Water treatment systems
The 991 Series emphasizes continuous online monitoring rather than periodic manual inspection, allowing maintenance personnel to detect developing machinery faults before serious damage occurs.
Technical Specifications
| Parameter |
Specification |
| Model |
991-01-XX-01-05 284318-01 |
| Product Type |
Industrial Vibration Transmitter |
| Measurement Principle |
Velocity-Based Housing Vibration Measurement |
| Measurement Method |
Continuous Online Monitoring |
| Output Signal |
4–20 mA Analog |
| Power Supply |
24 VDC Typical |
| Frequency Response |
Approximately 10 Hz to 1000 Hz |
| Measurement Direction |
Radial |
| Installation |
Stud Mounted |
| Electrical Connection |
Industrial Connector |
| Housing Material |
Stainless Steel |
| Enclosure Rating |
IP65 (Typical) |
| Operating Temperature |
-40°C to +85°C |
| Storage Temperature |
-55°C to +100°C |
| Measurement Accuracy |
±2% Full Scale (Typical) |
| Response Time |
Fast Dynamic Response |
| Signal Conditioning |
Integrated Electronics |
| EMC Performance |
High Electromagnetic Immunity |
| Output Isolation |
Internal Signal Conditioning |
| Maintenance Requirement |
Minimal Routine Maintenance |
| Dimensions |
Approximately 112 × 38 mm |
| Weight (kg) |
Approximately 0.45 kg |
Product Features
The 991-01-XX-01-05 284318-01 integrates vibration sensing, electronic processing, and analog output circuitry into a single compact enclosure, reducing installation complexity while improving overall system reliability.
Its standardized 4–20 mA current output allows direct communication with industrial automation equipment without requiring dedicated vibration monitoring hardware, making it suitable for both new installations and retrofit projects.
The transmitter is designed to withstand continuous operation in demanding industrial environments. Its stainless-steel housing provides excellent resistance to corrosion, humidity, oil exposure, and mechanical shock, ensuring long-term reliability under harsh operating conditions.
Integrated signal conditioning minimizes electrical noise while improving signal stability. High electromagnetic compatibility enables reliable measurements even when installed near variable-frequency drives, high-power motors, generators, or heavy industrial electrical equipment.
The compact dimensions simplify installation in confined machinery spaces where larger monitoring systems cannot easily be accommodated.
The transmitter delivers stable performance over extended operating periods, helping maintenance teams implement predictive maintenance strategies with confidence.
Product Advantages
Continuous Machinery Protection
The transmitter continuously measures machine vibration, allowing operators to identify abnormal operating conditions before equipment damage becomes severe.
Reliable Industrial Performance
Designed for long-term industrial service, the device maintains stable measurement performance despite exposure to vibration, dust, moisture, temperature variation, and electrical interference.
Easy System Integration
The standard 4–20 mA output allows seamless integration with PLC, DCS, SCADA, process controllers, and industrial monitoring systems.
Compact Mechanical Design
Its small size enables installation directly on machinery without occupying excessive installation space, making it suitable for compact equipment layouts.
Reduced Installation Complexity
Integrated sensing and signal conditioning eliminate the need for separate vibration signal converters, reducing wiring requirements and simplifying commissioning.
High Measurement Stability
Industrial-grade electronics minimize signal drift, providing consistent vibration measurements throughout long operating cycles.
Low Maintenance Requirements
The integrated design contains few serviceable components, reducing maintenance effort while improving long-term reliability.
Cost-Effective Predictive Maintenance
Continuous online monitoring helps maintenance personnel detect bearing wear, shaft imbalance, looseness, resonance, misalignment, and mechanical deterioration early, reducing unplanned shutdowns and maintenance expenses.
Product Applications
The 991-01-XX-01-05 284318-01 is suitable for monitoring numerous categories of rotating machinery operating in continuous industrial production environments.
Typical application equipment includes:
- Centrifugal pumps
- Multistage pumps
- Process pumps
- Electric motors
- Cooling water pumps
- Boiler feed pumps
- Industrial blowers
- High-capacity ventilation fans
- Gear reducers
- Compressors
- Steam turbines
- Gas turbines
- Cooling tower drives
- Mining conveyors
- Crushers
- Cement production machinery
- Pulp and paper production equipment
- Chemical process machinery
- Water treatment pumping stations
- Marine auxiliary machinery
- Offshore rotating equipment
- Steel manufacturing machinery
- Food processing rotating equipment
- Pharmaceutical production machinery
The transmitter supports predictive maintenance programs by continuously providing machine vibration information that assists maintenance personnel in identifying developing faults before catastrophic failures occur.
Recommended Models from the Same Series or Related Series
| Model |
Product Type |
Output Signal |
Power Supply |
Frequency Response |
Dimensions |
Weight (kg) |
| 991-01-XX-01-00 |
Vibration Transmitter |
4–20 mA |
24 VDC |
10 Hz–1000 Hz |
Approx. 112 × 38 mm |
Approx. 0.45 kg |
| 991-06-50-01-00 |
Vibration Transmitter |
4–20 mA |
24 VDC |
10 Hz–1000 Hz |
Approx. 112 × 38 mm |
Approx. 0.45 kg |
| 991-25-50-01-00 |
Vibration Transmitter |
4–20 mA |
24 VDC |
10 Hz–1000 Hz |
Approx. 112 × 38 mm |
Approx. 0.45 kg |
| 990-05-70-01-00 |
Industrial Vibration Transmitter |
4–20 mA |
24 VDC |
10 Hz–1000 Hz |
Approx. 110 × 38 mm |
Approx. 0.43 kg |
| 990-08-50-01-00 |
Industrial Vibration Transmitter |
4–20 mA |
24 VDC |
10 Hz–1000 Hz |
Approx. 110 × 38 mm |
Approx. 0.43 kg |
Popular Models from the Same Brand
| Model |
Product Type |
Primary Function |
Dimensions |
Weight (kg) |
| 3300 XL 8 mm Proximitor Sensor |
Proximity Sensor System |
Shaft Vibration and Position Monitoring |
Approx. 120 × 45 mm |
Approx. 0.60 kg |
| 3500/22M Transient Data Interface |
Monitoring Module |
Dynamic Data Collection |
Approx. 241 × 24 × 242 mm |
Approx. 0.80 kg |
| 3500/42M Proximitor Monitor |
Machinery Protection Module |
Shaft Vibration Monitoring |
Approx. 241 × 24 × 242 mm |
Approx. 0.85 kg |
| 3500/15 Power Supply Module |
Rack Power Supply Module |
System Power Distribution |
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 |
Product Summary
The Bently Nevada 991-01-XX-01-05 284318-01 is a compact industrial vibration transmitter developed for continuous online condition monitoring of rotating machinery. As a member of the 991 Series, it combines vibration sensing, signal conditioning, and standardized analog signal transmission into a single integrated device, providing dependable vibration measurements for industrial automation systems.
Its compact dimensions, durable stainless-steel construction, excellent environmental resistance, and stable long-term measurement performance make it suitable for installation in demanding industrial environments where machinery reliability is essential. The standardized 4–20 mA output enables straightforward integration with PLC, DCS, SCADA, and other industrial control platforms, reducing engineering complexity while improving monitoring efficiency.
The transmitter is particularly well suited for predictive maintenance programs, allowing maintenance personnel to detect abnormal vibration caused by imbalance, bearing wear, shaft misalignment, looseness, resonance, or mechanical deterioration at an early stage. By supporting continuous machinery health assessment, the device helps reduce unexpected downtime, optimize maintenance scheduling, extend equipment service life, improve operational efficiency, and lower overall maintenance costs across industries such as power generation, oil and gas, petrochemical processing, mining, metallurgy, water treatment, marine engineering, pulp and paper manufacturing, cement production, and general industrial automation.
