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- Bently Nevada
- 991-01-XX-01-CN 288865-01
- Vibration Transmitter
- USA
- 112 × 38 mm
- 0.45kg
- Xiamen, China
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Bently Nevada 991-01-XX-01-CN 288865-01
Comprehensive Product Overview, Technical Specifications, Product Features, Applications, Advantages, Series Information, and Model Recommendations
Product Overview
The Bently Nevada 991-01-XX-01-CN 288865-01 is a compact industrial vibration transmitter engineered for continuous online monitoring of rotating machinery. It is designed to convert mechanical vibration into a standard 4–20 mA analog output, enabling seamless integration with industrial automation systems for real-time machinery condition monitoring and predictive maintenance.
This model combines a vibration sensing element, signal conditioning circuitry, and analog output electronics within a single robust housing. Its integrated architecture minimizes installation complexity while improving signal stability and long-term operational reliability. The transmitter is intended for permanent installation on machinery where continuous monitoring is required to detect developing mechanical faults before they lead to unexpected downtime.
The 288865-01 configuration is part of the 991 Series, which is recognized for compact dimensions, reliable performance, simplified wiring, and excellent compatibility with industrial control systems. The transmitter provides continuous measurement of machine casing vibration, helping maintenance personnel monitor equipment health without interrupting production.
Its durable construction allows dependable operation under demanding industrial conditions involving vibration, dust, humidity, oil contamination, temperature variation, and electromagnetic interference. These characteristics make the transmitter suitable for both newly installed equipment and modernization projects where existing machinery requires reliable online vibration monitoring.
By continuously supplying vibration information to plant monitoring systems, the transmitter supports predictive maintenance strategies, reduces maintenance costs, extends machinery service life, improves equipment availability, and enhances overall production efficiency.
Brand Information
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Industrial Vibration Transmitter |
| Product Type | Machinery Condition Monitoring Device |
| Series | 991 Series |
| Monitoring Method | Continuous Online Vibration Monitoring |
| Output Type | 4–20 mA Analog Current |
| Installation | Direct Machine Mounting |
| Typical Monitoring Object | Rotating Machinery |
Product Series
The 991 Series consists of compact vibration transmitters developed for permanent installation on industrial rotating equipment. The series is intended to provide continuous machinery health monitoring while simplifying system integration and reducing installation costs.
Unlike portable vibration analyzers that require periodic manual measurements, transmitters in the 991 Series continuously transmit vibration data to plant monitoring systems, allowing maintenance engineers to evaluate equipment condition in real time.
Each transmitter integrates vibration sensing, signal processing, and current output electronics into a single compact enclosure. This integrated design reduces external hardware requirements while improving measurement consistency and operational reliability.
The 991 Series is widely applied in industrial environments where machinery operates continuously and equipment reliability is essential.
Typical monitored equipment includes:
- Centrifugal pumps
- Vertical pumps
- Electric motors
- Cooling water pumps
- Industrial fans
- High-capacity blowers
- Compressors
- Gear reducers
- Steam turbines
- Gas turbines
- Cooling tower drives
- Paper machine rolls
- Mining conveyors
- Crushers
- Cement production machinery
- Chemical processing equipment
- Offshore rotating machinery
- Marine auxiliary systems
- Steel manufacturing equipment
- General industrial rotating assets
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 991-01-XX-01-CN 288865-01 |
| Product Type | Industrial Vibration Transmitter |
| Series | 991 Series |
| Measurement Principle | Velocity-Based Housing Vibration Measurement |
| Monitoring Mode | Continuous Online Monitoring |
| Signal Output | 4–20 mA Analog Current |
| Power Supply | 24 VDC Typical |
| Frequency Response | Approximately 10 Hz to 1000 Hz |
| Measurement Direction | Radial |
| Measurement Accuracy | ±2% Full Scale (Typical) |
| Dynamic Response | Fast Response |
| Signal Conditioning | Built-In Electronic Circuit |
| Housing Material | Stainless Steel |
| Mounting Method | Stud Mounted |
| Electrical Interface | Industrial Connector |
| Protection Rating | IP65 (Typical) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +100°C |
| Electromagnetic Compatibility | Industrial EMC |
| Vibration Output | Linear Analog Current |
| Service Life | Long-Term Continuous Duty |
| Maintenance Requirement | Minimal |
| Dimensions | Approximately 112 × 38 mm |
| Weight (kg) | Approximately 0.45 kg |
Product Features
The 991-01-XX-01-CN 288865-01 is designed to provide dependable vibration monitoring throughout the entire operating life of industrial rotating equipment.
Its integrated sensing and signal processing electronics eliminate the need for separate external conditioning modules, simplifying installation and reducing overall system complexity.
The standard 4–20 mA analog output enables direct connection to PLCs, DCS platforms, SCADA systems, industrial controllers, and data acquisition equipment without requiring additional interface devices.
The compact transmitter housing allows installation on equipment where available mounting space is limited. This flexibility makes the device suitable for both OEM machinery and retrofit installations.
Industrial-grade internal electronics provide stable signal transmission with excellent resistance to electrical noise generated by large motors, variable-frequency drives, transformers, and switching equipment.
The corrosion-resistant stainless-steel enclosure protects internal components against harsh industrial environments, including dust, moisture, lubricants, vibration, and mechanical impact.
Its stable long-term performance minimizes calibration drift, reducing maintenance workload while improving overall monitoring reliability.
Product Advantages
Continuous Real-Time Monitoring
The transmitter continuously measures machinery vibration and delivers real-time condition data, allowing maintenance personnel to identify abnormal operating conditions before equipment damage becomes severe.
High Industrial Reliability
Designed specifically for demanding industrial environments, the transmitter maintains consistent measurement accuracy under continuous vibration, temperature fluctuations, dust, humidity, and electrical interference.
Compact Mechanical Structure
The small housing simplifies installation on machinery with limited available mounting space while maintaining excellent measurement performance.
Simple Integration
The industry-standard 4–20 mA output enables straightforward integration with virtually all industrial automation systems without requiring specialized communication hardware.
Reduced Installation Cost
Integrated vibration sensing and signal conditioning significantly reduce external hardware, wiring, installation time, and commissioning effort.
Excellent Signal Stability
Industrial electronic components ensure low signal drift and dependable measurement accuracy throughout long operating periods.
Low Maintenance Requirement
The rugged integrated design minimizes routine maintenance, reducing operational costs while increasing equipment availability.
Improved Predictive Maintenance
Continuous vibration monitoring supports early identification of imbalance, shaft misalignment, looseness, resonance, bearing deterioration, mechanical wear, and other developing faults, allowing maintenance activities to be scheduled before failures occur.
Product Applications
The 991-01-XX-01-CN 288865-01 is widely used for permanent vibration monitoring of industrial rotating equipment operating under continuous production conditions.
Typical application equipment includes:
- Centrifugal pumps
- Multistage pumps
- Vertical pumps
- Process pumps
- Electric motors
- Cooling water pumps
- Boiler feed pumps
- Industrial fans
- Ventilation systems
- High-capacity blowers
- Air compressors
- Refrigeration compressors
- Steam turbines
- Gas turbines
- Gearboxes
- Cooling tower drives
- Mining machinery
- Crushers
- Cement processing equipment
- Paper production machinery
- Chemical processing systems
- Offshore production equipment
- Marine auxiliary machinery
- Water treatment pumping stations
- Food processing equipment
- Pharmaceutical manufacturing systems
- Steel plant rotating machinery
Continuous vibration monitoring enables maintenance teams to evaluate machinery condition without interrupting production, thereby reducing unexpected downtime, improving maintenance planning, extending equipment life, and increasing plant productivity.
Recommended Models from the Same Series or Related Series
| Model | Product Type | Output Signal | Frequency Response | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 991-01-XX-01-CN 284318-01 | Industrial Vibration Transmitter | 4–20 mA | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-01-XX-01-05 | Industrial Vibration Transmitter | 4–20 mA | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-01-XX-01-00 | Industrial Vibration Transmitter | 4–20 mA | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-06-50-01-00 | Industrial Vibration Transmitter | 4–20 mA | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 kg |
| 991-25-50-01-00 | Industrial Vibration Transmitter | 4–20 mA | 10 Hz–1000 Hz | Approx. 112 × 38 mm | Approx. 0.45 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 |
| 3500/40M | Proximitor Monitor Module | Continuous Shaft Position and Vibration Monitoring | Approx. 241 × 24 × 242 mm | Approx. 0.82 kg |
Product Summary
The Bently Nevada 991-01-XX-01-CN 288865-01 is a compact, permanently installed vibration transmitter developed for continuous machinery condition monitoring in demanding industrial environments. As a member of the 991 Series, it integrates vibration sensing, electronic signal conditioning, and standardized analog current output into a single rugged device, providing reliable machinery health information throughout continuous production cycles.
Its compact design, durable stainless-steel housing, stable long-term performance, and broad compatibility with industrial automation systems make it an effective solution for monitoring pumps, motors, compressors, turbines, fans, gearboxes, and numerous other rotating assets. The transmitter continuously supplies accurate vibration data that assists maintenance personnel in detecting imbalance, bearing wear, shaft misalignment, looseness, resonance, and mechanical deterioration at an early stage.
Through continuous online monitoring, the 991-01-XX-01-CN 288865-01 supports predictive maintenance strategies, reduces unplanned shutdowns, lowers maintenance costs, extends machinery service life, improves equipment availability, and enhances production efficiency. It is well suited for applications in power generation, oil and gas, petrochemical processing, mining, metallurgy, water treatment, marine engineering, pulp and paper manufacturing, cement production, steel processing, and a wide range of industrial automation systems.