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- Bently Nevada
- 991-25-XX-02-05
- Vibration Transmitter
- USA
- 120 × 65 × 55 mm
- 0.45kg
- Xiamen, China
- New & In Stock
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Bently Nevada 991-25-XX-02-05
Comprehensive Product Description, Technical Specifications, Applications, Advantages, Series Information, and Recommended Models
Product Introduction
The Bently Nevada 991-25-XX-02-05 is an industrial-grade vibration transmitter designed for continuous condition monitoring of rotating machinery. As part of the 991 Vibration Transmitter Series, it combines vibration sensing, signal conditioning, and analog transmission into a compact field-mounted device that is suitable for long-term industrial operation.
The transmitter is engineered to monitor machine vibration continuously and convert measured vibration values into a standard 4–20 mA analog output, allowing the data to be transmitted directly to industrial automation systems such as PLCs, DCSs, SCADA platforms, HMIs, and distributed monitoring systems. Its simple architecture makes it ideal for facilities that require reliable vibration monitoring without the complexity of a full machinery protection rack.
The 991-25-XX-02-05 is designed with industrial durability in mind. Its rugged enclosure, stable electronics, and excellent resistance to vibration, temperature fluctuations, and electromagnetic interference enable reliable operation in demanding industrial environments. The compact size allows installation close to the monitored equipment, reducing wiring complexity and improving signal integrity.
This model is widely selected for predictive maintenance programs where continuous vibration monitoring helps maintenance teams identify developing mechanical problems before they result in costly downtime. It provides a practical solution for improving equipment reliability, extending machinery life, and reducing maintenance expenses.
Brand Information
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Industrial Vibration Transmitter |
| Product Type | Machinery Condition Monitoring Instrument |
| Monitoring Method | Continuous Online Monitoring |
| Installation Type | Field Mounted |
| Output Signal | 4–20 mA Analog |
| Primary Function | Machine Vibration Monitoring |
Product Series
| Item | Description |
|---|---|
| Series | 991 Vibration Transmitter Series |
| Series Type | Integrated Field Vibration Transmitters |
| Monitoring Object | Rotating Equipment |
| Measurement Principle | Continuous Vibration Measurement |
| Signal Conversion | Integrated Analog Output |
| Typical Applications | Predictive Maintenance and Equipment Protection |
| Compatible Systems | PLC, DCS, SCADA, HMI |
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 991-25-XX-02-05 |
| Product Type | Industrial Vibration Transmitter |
| Series | 991 Series |
| Monitoring Function | Continuous Machinery Vibration Monitoring |
| Output Signal | 4–20 mA Analog |
| Power Supply | 12–35 VDC |
| Measuring Principle | Velocity/Displacement Vibration Monitoring |
| Measurement Accuracy | High Industrial Accuracy |
| Frequency Response | Typical Industrial Machinery Frequency Range |
| Electrical Connection | Terminal Connection |
| Housing Material | Industrial Aluminum Alloy |
| Protection Rating | IP65 (Typical) |
| EMC Performance | Industrial Grade |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -50°C to +100°C |
| Relative Humidity | Up to 95% Non-condensing |
| Mounting Method | Direct Field Mounting |
| Response Speed | Fast Dynamic Response |
| Maintenance Requirement | Low Maintenance |
| Expected Service Life | Long-Term Continuous Operation |
| Dimensions | Approximately 120 × 65 × 55 mm |
| Weight (kg) | Approximately 0.45 kg |
Product Features
The 991-25-XX-02-05 is specifically developed for continuous vibration monitoring of rotating machinery operating in industrial environments. It integrates sensing, signal processing, and analog output into one compact device, reducing installation complexity while improving overall monitoring reliability.
One of its key characteristics is the ability to continuously convert machine vibration into a stable 4–20 mA output, making it compatible with virtually all industrial control systems. This allows maintenance personnel to monitor equipment health in real time without requiring complex signal conversion hardware.
Its industrial enclosure provides excellent protection against dust, moisture, vibration, and electrical noise. The transmitter is designed to maintain stable measurement performance throughout extended operating periods with minimal maintenance.
The compact mechanical structure also enables installation in confined equipment locations, making it suitable for retrofit projects as well as new machinery installations.
Because of its stable output characteristics and dependable electronics, the transmitter contributes to improved machine reliability and more effective predictive maintenance strategies.
Product Applications
The 991-25-XX-02-05 is widely used in industrial facilities where continuous machine health monitoring is required to improve equipment reliability and minimize unexpected shutdowns.
Typical applications include:
- Steam turbines
- Gas turbines
- Industrial compressors
- Centrifugal compressors
- Electric motors
- Centrifugal pumps
- Process pumps
- Cooling water pumps
- Boiler feed pumps
- Industrial fans
- Blowers
- Gearboxes
- Paper manufacturing equipment
- Mining machinery
- Cement production systems
- Petrochemical processing equipment
- Oil and gas production facilities
- Offshore platforms
- Thermal power stations
- Hydroelectric plants
- Steel manufacturing equipment
- Chemical processing plants
- Water and wastewater treatment facilities
- General industrial rotating machinery
In these applications, the transmitter continuously measures machine vibration and provides operators with valuable information for detecting shaft imbalance, bearing deterioration, coupling misalignment, mechanical looseness, structural resonance, and other developing faults before they lead to production interruptions.
Product Advantages
Reliable Continuous Monitoring
The transmitter provides uninterrupted vibration measurement for critical rotating machinery, supporting long-term condition monitoring programs.
Easy System Integration
The standard 4–20 mA analog output allows direct integration into existing industrial automation systems without requiring additional interface equipment.
Compact Mechanical Design
Its small footprint simplifies installation even in machinery with limited available space.
Rugged Industrial Construction
The durable enclosure is designed to withstand harsh industrial environments, including vibration, dust, humidity, and temperature variations.
Stable Measurement Performance
High-quality electronic circuitry ensures consistent output accuracy during continuous operation.
Low Maintenance Requirements
The transmitter is engineered for long service intervals, helping reduce maintenance workload and operating costs.
Improved Equipment Availability
Continuous monitoring enables maintenance personnel to detect abnormal vibration trends early, reducing unexpected equipment failures and improving production efficiency.
Cost-Effective Monitoring Solution
Compared with larger machinery protection systems, the 991 Series provides an economical yet highly dependable vibration monitoring solution for many industrial applications.
Recommended Models from the Same Series
| Model | Product Type | Main Application | Output Signal | Power Supply | Operating Temperature | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 991-01-XX-01 | Vibration Transmitter | General Machinery | 4–20 mA | 12–35 VDC | -40°C to +85°C | 120 × 65 × 55 mm | 0.45 |
| 991-05-XX-01 | Vibration Transmitter | Industrial Motors | 4–20 mA | 12–35 VDC | -40°C to +85°C | 120 × 65 × 55 mm | 0.45 |
| 991-10-XX-01 | Vibration Transmitter | Compressors | 4–20 mA | 12–35 VDC | -40°C to +85°C | 120 × 65 × 55 mm | 0.45 |
| 991-20-XX-01 | Vibration Transmitter | Turbines | 4–20 mA | 12–35 VDC | -40°C to +85°C | 120 × 65 × 55 mm | 0.45 |
| 991-25-XX-01-CN | Vibration Transmitter | Pumps and Rotating Equipment | 4–20 mA | 12–35 VDC | -40°C to +85°C | 120 × 65 × 55 mm | 0.45 |
Recommended Popular Models from the Same Brand
| Model | Product Category | Main Function | Output | Operating Temperature | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 3500/15 | Power Supply Module | Rack Power Distribution | Internal System Power | 0°C to +65°C | 241 × 24 × 242 mm | 0.85 |
| 3500/22M | Transient Data Interface | Dynamic Data Communication | Ethernet | 0°C to +65°C | 241 × 24 × 242 mm | 0.70 |
| 3500/42M | Proximitor Monitor | Shaft Vibration Monitoring | System Interface | 0°C to +65°C | 241 × 24 × 242 mm | 0.82 |
| 3500/60 | Temperature Monitor | Multi-channel Temperature Monitoring | System Interface | 0°C to +65°C | 241 × 24 × 242 mm | 0.80 |
| 3300 XL 8 mm Proximity Probe | Proximity Probe | Shaft Position and Vibration Measurement | Dynamic Sensor Signal | -52°C to +177°C | Probe Diameter 8 mm, Configurable Length | 0.18 |
Product Summary
The Bently Nevada 991-25-XX-02-05 is a reliable field-mounted vibration transmitter developed for continuous monitoring of industrial rotating machinery. As a member of the 991 Vibration Transmitter Series, it combines dependable vibration measurement, integrated signal conditioning, and a standardized 4–20 mA analog output within a compact and rugged industrial enclosure.
Its straightforward installation, excellent compatibility with industrial automation systems, low maintenance requirements, and long-term operational stability make it an effective solution for predictive maintenance and machinery condition monitoring. The transmitter is suitable for a broad range of rotating equipment, including pumps, compressors, turbines, motors, fans, and gearboxes across industries such as power generation, petrochemical processing, oil and gas, mining, metallurgy, water treatment, paper manufacturing, and general industrial production.
By providing continuous vibration data, the 991-25-XX-02-05 helps maintenance personnel detect mechanical abnormalities at an early stage, improve equipment availability, reduce unplanned downtime, extend machinery service life, and support safer and more efficient plant operation.