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- Bently Nevada
- 991-01-XX-01-CN 284318-01
- Vibration Transmitter
- USA
- 112 × 38 mm
- 0.45kg
- Xiamen, China
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Bently Nevada 991-01-XX-01-CN 284318-01
Comprehensive Product Description, Technical Specifications, Series Information, Applications, Advantages, and Recommended Models
Product Overview
The Bently Nevada 991-01-XX-01-CN 284318-01 is a compact industrial vibration transmitter designed for continuous online monitoring of rotating machinery. It integrates vibration sensing, signal conditioning, and analog current output into a single field-mounted device, providing an efficient solution for machinery condition monitoring and predictive maintenance programs.
This transmitter continuously measures the overall vibration level of machine housings and converts the measured value into a standard 4–20 mA analog output, allowing direct communication with industrial automation systems such as PLCs, DCS platforms, SCADA systems, distributed control networks, and condition monitoring software. The integrated design simplifies installation, minimizes wiring requirements, and improves long-term operational reliability.
The CN configuration is intended for applications requiring standardized industrial connectivity and dependable vibration monitoring performance in continuous-duty operating environments. The transmitter is suitable for installation on motors, pumps, compressors, fans, blowers, gearboxes, turbines, and numerous other rotating assets where early fault detection is essential.
Its robust mechanical construction enables stable operation under demanding industrial conditions including vibration, dust, humidity, oil contamination, and electromagnetic interference. The compact size also allows installation in confined equipment locations where larger monitoring devices may not be practical.
Designed for long service life and minimal maintenance, the transmitter provides reliable vibration information that helps maintenance engineers detect abnormal operating conditions before they develop into costly mechanical failures. As part of a predictive maintenance strategy, the transmitter contributes to increased equipment availability, improved production efficiency, and reduced maintenance expenditure.
Brand Information
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Industrial Vibration Transmitter |
| Product Type | Machinery Condition Monitoring Device |
| Monitoring Method | Continuous Online Vibration Monitoring |
| Signal Output | 4–20 mA Analog Current |
| Installation Type | Direct Machine Mounting |
| Typical Installation Position | Bearing Housing or Machine Casing |
Product Series
The 991 Series is a family of compact industrial vibration transmitters developed for permanent installation on rotating machinery. The series is designed to provide reliable continuous vibration monitoring while maintaining simple installation and excellent compatibility with industrial automation systems.
Unlike portable vibration instruments used for periodic inspections, the 991 Series performs continuous online monitoring, allowing maintenance personnel to observe machine condition in real time and identify developing faults at an early stage.
The series combines sensing, signal conditioning, and analog signal transmission within one compact enclosure, reducing system complexity while improving overall monitoring reliability.
Typical equipment monitored by the 991 Series includes:
- Centrifugal pumps
- Vertical pumps
- Electric motors
- Cooling tower drives
- Axial fans
- Centrifugal fans
- Industrial blowers
- Gear reducers
- Compressors
- Steam turbines
- Gas turbines
- Water treatment equipment
- Paper machine rolls
- Conveyor drive systems
- Crushers
- Cement processing equipment
- Mining machinery
- Chemical process machinery
- Marine auxiliary machinery
- General rotating industrial equipment
The 991 Series is valued for its reliability, stable signal output, compact dimensions, and ease of integration into existing plant control systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 991-01-XX-01-CN 284318-01 |
| Product Type | Industrial Vibration Transmitter |
| Series | 991 Series |
| Measurement Principle | Velocity-Based Housing Vibration Measurement |
| Monitoring Mode | Continuous Online Monitoring |
| Output Signal | 4–20 mA Analog Current |
| Power Supply | 24 VDC Typical |
| Measurement Direction | Radial |
| Frequency Response | Approximately 10 Hz to 1000 Hz |
| Measurement Accuracy | ±2% Full Scale (Typical) |
| Signal Conditioning | Integrated Electronics |
| Electrical Connection | Industrial Connector |
| Mounting Method | Stud Mounted |
| Housing Material | Stainless Steel |
| Protection Rating | IP65 (Typical) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +100°C |
| Electromagnetic Compatibility | High Industrial EMC Performance |
| Vibration Output | Linear Current Output |
| Maintenance Requirement | Low Maintenance |
| Service Life | Long-Term Continuous Operation |
| Dimensions | Approximately 112 × 38 mm |
| Weight (kg) | Approximately 0.45 kg |
Product Features
The 991-01-XX-01-CN 284318-01 integrates vibration sensing and electronic signal processing into a compact industrial transmitter designed for permanent machinery installation.
Its built-in electronics convert vibration signals directly into a stable 4–20 mA analog output, eliminating the need for separate signal conditioning modules and reducing installation costs.
The compact mechanical design allows installation on machinery where available mounting space is limited. This flexibility makes the transmitter suitable for retrofit projects as well as new equipment installations.
The stainless-steel enclosure offers excellent resistance to corrosion, oil contamination, moisture, vibration, and mechanical impact, ensuring dependable operation in harsh industrial environments.
High electromagnetic immunity minimizes signal interference from variable frequency drives, switching equipment, generators, transformers, and large electric motors.
The transmitter maintains stable measurement accuracy over long operating periods, reducing calibration requirements and supporting continuous predictive maintenance strategies.
Its industrial construction allows continuous operation throughout demanding production cycles with minimal maintenance intervention.
Product Advantages
Continuous Equipment Health Monitoring
The transmitter continuously measures machine vibration and provides real-time condition information that enables maintenance personnel to identify abnormal operating conditions before severe equipment damage occurs.
Excellent Industrial Reliability
Designed specifically for industrial machinery, the transmitter maintains dependable performance under challenging environmental conditions including dust, humidity, vibration, temperature fluctuations, and electrical interference.
Simplified Installation
Integrated sensing, processing, and analog output significantly reduce installation complexity by minimizing external components and wiring requirements.
Easy Integration
The standardized 4–20 mA current output allows direct connection to PLCs, DCS systems, SCADA platforms, industrial controllers, data acquisition systems, and monitoring software.
Compact Design
Its small mechanical footprint enables installation on equipment where space is restricted while maintaining excellent measurement performance.
Long-Term Operational Stability
Industrial-grade electronic components provide excellent long-term stability with minimal signal drift during continuous operation.
Reduced Maintenance Costs
Continuous vibration monitoring supports predictive maintenance programs, allowing maintenance work to be scheduled according to actual equipment condition rather than fixed maintenance intervals.
Improved Equipment Availability
Early detection of mechanical faults such as bearing wear, imbalance, shaft misalignment, looseness, resonance, and mechanical deterioration helps prevent unexpected shutdowns and increases production efficiency.
Product Applications
The 991-01-XX-01-CN 284318-01 is suitable for continuous vibration monitoring across a broad range of industrial rotating equipment.
Typical applications include:
- Centrifugal pumps
- Vertical pumps
- Boiler feed pumps
- Process pumps
- Cooling water pumps
- Electric motors
- Industrial ventilation fans
- High-capacity blowers
- Gearboxes
- Compressors
- Steam turbines
- Gas turbines
- Cooling tower drive systems
- Mining conveyors
- Cement production equipment
- Crushers
- Steel manufacturing machinery
- Pulp and paper production equipment
- Water treatment pumping stations
- Chemical processing machinery
- Offshore production equipment
- Marine propulsion auxiliary systems
- Food processing rotating machinery
- Pharmaceutical manufacturing equipment
The transmitter plays an important role in predictive maintenance systems by providing continuous vibration information that helps engineers detect developing machinery faults before failures occur, thereby improving plant reliability and extending equipment service life.
Recommended Models from the Same Series or Related Series
| Model | Product Type | Output Signal | Power Supply | Frequency Response | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 991-01-XX-01-05 | Vibration Transmitter | 4–20 mA | 24 VDC | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 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 |
| 990-08-50-01-00 | 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 |
| 330103-00-05-10-02-00 | Proximity Probe | Shaft Displacement Measurement | Approx. 110 × 25 mm | Approx. 0.30 kg |
| 3500/22M | Transient Data Interface Module | Dynamic Machinery Data Collection | Approx. 241 × 24 × 242 mm | Approx. 0.80 kg |
| 3500/42M | Proximitor Monitor Module | Shaft Vibration and Position Monitoring | Approx. 241 × 24 × 242 mm | Approx. 0.85 kg |
| 3500/15 | Power Supply Module | Rack Power Distribution | Approx. 241 × 50 × 242 mm | Approx. 1.20 kg |
Product Summary
The Bently Nevada 991-01-XX-01-CN 284318-01 is a high-performance industrial vibration transmitter developed for continuous online machinery condition monitoring. As a member of the 991 Series, it combines vibration sensing, electronic signal conditioning, and standardized analog current transmission within a compact and durable enclosure, providing a dependable solution for industrial predictive maintenance applications.
Its rugged construction, compact dimensions, low maintenance requirements, and excellent compatibility with industrial automation systems make it suitable for installation on a wide variety of rotating machinery operating in demanding industrial environments. The transmitter delivers continuous vibration information that enables maintenance personnel to detect early signs of bearing degradation, shaft imbalance, mechanical looseness, misalignment, resonance, and other developing faults before they result in costly equipment failures.
By supporting continuous equipment health assessment, improving maintenance planning, reducing unexpected downtime, extending machinery service life, and enhancing production efficiency, the 991-01-XX-01-CN 284318-01 serves as a practical and reliable vibration monitoring solution for industries including power generation, petrochemical processing, oil and gas, mining, metallurgy, water treatment, marine engineering, pulp and paper manufacturing, cement production, steel processing, and general industrial automation.