Comprehensive Product Overview, Technical Specifications, Applications, Advantages, Series Information, and Related Model Recommendations
Product Overview
The 991-25-XX-01-CN is an industrial vibration transmitter designed for continuous machinery condition monitoring. It belongs to the 991 Vibration Transmitter Series, a product family developed specifically for rotating equipment requiring reliable vibration measurement and real-time signal transmission.
This transmitter converts vibration signals collected from compatible sensors into a standardized 4–20 mA analog output, allowing seamless integration with PLCs, DCSs, SCADA systems, industrial controllers, and monitoring platforms. It provides a simple yet effective solution for monitoring machine health without the complexity of a full rack-based monitoring system.
Designed for harsh industrial environments, the 991 Series offers stable measurement performance, excellent electromagnetic compatibility, and long-term operational reliability. It is widely used in industries where rotating equipment plays a critical role in production continuity and asset protection.
Unlike conventional monitoring devices that require extensive configuration, the 991 Series emphasizes straightforward installation, rapid commissioning, and dependable operation. Its rugged housing and industrial-grade electronic components enable continuous operation under demanding environmental conditions.
Brand
| Item |
Description |
| Brand |
Bently Nevada |
| Product Category |
Industrial Vibration Transmitter |
| Product Type |
Machinery Condition Monitoring Device |
| Product Family |
Industrial Monitoring Instrument |
| Main Function |
Continuous Vibration Monitoring |
| Output Signal |
4–20 mA Analog |
| Installation |
Industrial Field Installation |
Product Series
| Item |
Description |
| Series Name |
991 Vibration Transmitter Series |
| Series Type |
Integrated Vibration Monitoring Solutions |
| Monitoring Target |
Rotating Machinery |
| Measurement Principle |
Velocity/Displacement Vibration Monitoring |
| Industrial Application |
Continuous Machine Protection |
| Signal Interface |
Analog Current Output |
| System Compatibility |
PLC, DCS, SCADA, HMI |
Technical Specifications
| Parameter |
Specification |
| Model |
991-25-XX-01-CN |
| Product Type |
Vibration Transmitter |
| Series |
991 Series |
| Measuring Principle |
Continuous Vibration Measurement |
| Signal Output |
4–20 mA |
| Power Supply |
12–35 VDC |
| Frequency Response |
Typical industrial vibration range |
| Accuracy |
High industrial measurement accuracy |
| Response Time |
Fast response |
| Electrical Connection |
Industrial Terminal Connection |
| Housing Material |
Industrial Aluminum Alloy |
| Protection Rating |
IP65 (Typical) |
| Operating Temperature |
-40°C to +85°C |
| Storage Temperature |
-50°C to +100°C |
| Relative Humidity |
Up to 95% Non-condensing |
| EMC Performance |
Industrial Grade |
| Installation Method |
Field Mounted |
| Diagnostic Capability |
Continuous Signal Monitoring |
| Maintenance Requirement |
Minimal |
| Service Life |
Long-term Continuous Operation |
| Dimensions |
Approximately 120 × 65 × 55 mm |
| Weight (kg) |
Approximately 0.45 kg |
Product Features
The 991-25-XX-01-CN has been engineered to provide continuous machine vibration monitoring in demanding industrial environments.
Its integrated transmitter design simplifies installation by combining sensing and signal conditioning into a compact field-mounted device. This approach reduces wiring complexity while improving overall system reliability.
The transmitter continuously converts measured vibration into a stable 4–20 mA output signal, making it compatible with most industrial automation systems. Operators can monitor equipment condition in real time without requiring sophisticated vibration analysis hardware.
The rugged enclosure provides excellent resistance against vibration, dust, humidity, and temperature fluctuations. This ensures stable long-term operation even in heavy industrial environments.
Another important feature is its fast dynamic response, enabling maintenance personnel to identify abnormal vibration trends before equipment damage becomes severe.
The product also minimizes maintenance requirements through its durable electronic design and high-quality industrial components, making it suitable for continuous 24-hour operation.
Product Applications
The 991-25-XX-01-CN is widely applied in industrial machinery condition monitoring systems where equipment reliability and predictive maintenance are essential.
Typical applications include:
- Steam turbines
- Gas turbines
- Industrial compressors
- Centrifugal pumps
- Process pumps
- Cooling water pumps
- Blowers
- Industrial fans
- Gearboxes
- Electric motors
- Vertical pumps
- Horizontal pumps
- Paper manufacturing equipment
- Mining machinery
- Cement production equipment
- Petrochemical processing units
- Offshore platforms
- Power generation facilities
- Steel manufacturing plants
- Water treatment systems
In these applications, the transmitter continuously measures machine vibration and provides operators with real-time operating status, allowing maintenance teams to detect imbalance, bearing wear, shaft misalignment, looseness, and other developing mechanical faults before unexpected failures occur.
Product Advantages
Excellent Reliability
Designed for continuous industrial operation, the transmitter maintains stable performance over long service intervals even under demanding environmental conditions.
Simple Installation
Its compact construction significantly reduces installation time while minimizing wiring complexity.
High Compatibility
The standard 4–20 mA output allows direct connection to most industrial control systems without requiring additional signal converters.
Continuous Monitoring
Real-time vibration monitoring enables predictive maintenance strategies that reduce unexpected downtime and maintenance costs.
Compact Design
The small physical footprint allows installation in confined equipment locations where space is limited.
Low Maintenance
The industrial-grade electronic architecture requires minimal routine maintenance throughout its operational life.
High Environmental Resistance
The enclosure withstands vibration, dust, humidity, and industrial temperature variations, ensuring reliable operation in challenging environments.
Cost-Effective Solution
Compared with complex machinery protection systems, the 991 Series provides an economical approach for continuous vibration monitoring.
Recommended Models from the Same Series
| Model |
Product Type |
Main Application |
Signal Output |
Power Supply |
Operating Temperature |
Dimensions |
Weight (kg) |
| 991-01-XX-01 |
Vibration Transmitter |
Pumps |
4–20 mA |
12–35 VDC |
-40°C to +85°C |
120 × 65 × 55 mm |
0.45 |
| 991-05-XX-01 |
Vibration Transmitter |
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 |
| 991-15-XX-01 |
Vibration Transmitter |
Fans |
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 |
Recommended Popular Models from the Same Brand
| Model |
Product Category |
Main Function |
Signal Output |
Power Supply |
Operating Temperature |
Dimensions |
Weight (kg) |
| 3300 XL 8 mm Proximity Probe |
Proximity Sensor |
Shaft Vibration Measurement |
Dynamic Signal |
Sensor Powered |
-52°C to +177°C |
Probe Ø8 mm, Length Depends on Configuration |
0.18 |
| 3500/22M Transient Data Interface |
Communication Module |
Dynamic Data Acquisition |
Ethernet |
24 VDC |
0°C to +65°C |
241 × 24 × 242 mm |
0.70 |
| 3500/42M Proximitor Monitor |
Monitoring Module |
Shaft Vibration Monitoring |
System Interface |
Rack Powered |
0°C to +65°C |
241 × 24 × 242 mm |
0.82 |
| 3500/15 Power Supply Module |
Power Module |
System Power Distribution |
Internal Power |
AC/DC Input |
0°C to +65°C |
241 × 24 × 242 mm |
0.85 |
| 3500/60 Temperature Monitor |
Temperature Monitoring Module |
Multi-channel Temperature Measurement |
System Interface |
Rack Powered |
0°C to +65°C |
241 × 24 × 242 mm |
0.80 |
Summary
The 991-25-XX-01-CN is a compact industrial vibration transmitter designed for continuous machinery condition monitoring in rotating equipment. As a member of the 991 Vibration Transmitter Series, it combines reliable vibration measurement, standardized 4–20 mA signal output, straightforward installation, and long-term operational stability into a single field-mounted device.
Its compatibility with modern industrial automation systems allows easy integration into predictive maintenance programs while helping operators improve equipment availability, reduce maintenance costs, and extend machinery service life. With its rugged construction, compact dimensions, broad environmental tolerance, and dependable performance, the 991-25-XX-01-CN remains a practical solution for vibration monitoring across power generation, oil and gas, petrochemical, water treatment, mining, steel production, manufacturing, and other heavy industrial sectors.
