Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |

The Bently Nevada 991-50-XX-01-00 (Part Number: 284264-01) is an industrial vibration transmitter designed for continuous online condition monitoring of rotating machinery. It belongs to the 991 Vibration Transmitter Series, a family of compact monitoring devices developed for measuring machinery vibration and transmitting standardized process signals to industrial automation systems.
The transmitter integrates vibration sensing, signal conditioning, and analog signal transmission into one compact housing. It continuously converts measured vibration values into a 4–20 mA analog output, allowing operators to monitor machine health through PLCs, DCSs, SCADA systems, HMIs, or other industrial control platforms.
The model is intended for installations where reliable machinery condition monitoring is required without deploying a complete rack-based protection system. Its compact mechanical design, industrial-grade electronics, and durable enclosure make it suitable for continuous operation in demanding production environments.
The 991-50-XX-01-00 provides stable performance over long operating periods and supports predictive maintenance strategies by helping maintenance personnel identify abnormal vibration conditions before they develop into serious mechanical failures. This reduces unplanned downtime, lowers maintenance costs, and improves equipment availability.
The transmitter is widely used in power generation, petrochemical processing, oil and gas production, mining, metallurgy, water treatment, manufacturing, and many other industrial sectors where rotating equipment operates continuously.
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Industrial Vibration Transmitter |
| Product Type | Machinery Condition Monitoring Device |
| Product Family | Industrial Monitoring Instrument |
| Monitoring Method | Continuous Online Monitoring |
| Primary Function | Machinery Vibration Measurement |
| Signal Output | Standard 4–20 mA Analog Output |
| Item | Description |
|---|---|
| Series Name | 991 Vibration Transmitter Series |
| Series Type | Integrated Field Vibration Monitoring Devices |
| Monitoring Principle | Continuous Machinery Vibration Measurement |
| Installation Method | Field Mounted |
| Output Interface | Analog Current Output |
| Compatible Systems | PLC, DCS, SCADA, HMI |
| Typical Equipment | Pumps, Motors, Compressors, Turbines, Fans |
| Parameter | Specification |
|---|---|
| Model | 991-50-XX-01-00 |
| Part Number | 284264-01 |
| Product Type | Industrial Vibration Transmitter |
| Series | 991 Vibration Transmitter Series |
| Monitoring Function | Continuous Vibration Monitoring |
| Output Signal | 4–20 mA Analog |
| Power Supply | 12–35 VDC |
| Measurement Principle | Velocity-Based Vibration Measurement |
| Measurement Performance | High Stability Industrial Measurement |
| Frequency Response | Suitable for Typical Rotating Machinery |
| Electrical Connection | Terminal Connection |
| Housing Material | Industrial Aluminum Alloy |
| Protection Rating | IP65 (Typical Industrial Configuration) |
| Electromagnetic Compatibility | Industrial EMC Design |
| 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 Installation |
| Response Time | Fast Dynamic Response |
| Calibration | Factory Calibrated |
| Maintenance Requirement | Low |
| Expected Service Life | Long Continuous Service |
| Dimensions | Approximately 120 × 65 × 55 mm |
| Weight (kg) | Approximately 0.45 kg |
The 991-50-XX-01-00 has been designed for reliable machinery vibration monitoring in industrial environments where continuous equipment operation is essential.
Its integrated transmitter structure combines signal conditioning and analog transmission within a compact housing, simplifying installation while reducing overall system complexity.
The transmitter continuously converts vibration measurements into a standardized 4–20 mA current signal, enabling direct communication with industrial control systems without requiring additional signal converters.
The compact enclosure allows installation close to monitored machinery, minimizing cable length and improving signal quality. This design also reduces installation costs and simplifies maintenance.
Industrial-grade electronic components provide stable long-term operation even under severe vibration, temperature variation, humidity, and electromagnetic interference.
The transmitter supports predictive maintenance by providing continuous operating information that allows maintenance personnel to detect abnormal machine conditions before significant mechanical damage occurs.
The 991-50-XX-01-00 is suitable for continuous vibration monitoring across numerous industrial sectors.
Typical applications include:
Continuous monitoring allows early identification of machinery problems such as bearing wear, shaft imbalance, mechanical looseness, coupling misalignment, excessive vibration, structural resonance, and developing mechanical faults, enabling maintenance teams to schedule repairs before unexpected failures occur.
The transmitter delivers uninterrupted vibration measurement, providing dependable machine condition information throughout long operating periods.
Its space-saving housing enables installation in confined equipment locations while maintaining excellent durability.
The standardized 4–20 mA analog output supports direct connection to virtually all industrial automation and process control systems.
The industrial enclosure is designed to withstand vibration, dust, humidity, and demanding operating environments commonly found in heavy industry.
High-quality electronic circuitry ensures accurate and repeatable vibration measurement during continuous operation.
Its reliable construction minimizes maintenance requirements and helps reduce long-term operating expenses.
Continuous monitoring allows maintenance personnel to detect abnormal vibration trends before mechanical failures occur, improving equipment reliability and plant productivity.
Industrial-grade materials and robust internal design contribute to dependable long-term service in continuous-duty applications.
| Model | Product Type | Output Signal | Operating Temperature | Typical Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 991-01-XX-01 | Vibration Transmitter | 4–20 mA | -40°C to +85°C | General Machinery | 120 × 65 × 55 mm | 0.45 |
| 991-05-XX-01 | Vibration Transmitter | 4–20 mA | -40°C to +85°C | Electric Motors | 120 × 65 × 55 mm | 0.45 |
| 991-10-XX-01 | Vibration Transmitter | 4–20 mA | -40°C to +85°C | Compressors | 120 × 65 × 55 mm | 0.45 |
| 991-25-XX-01-CN | Vibration Transmitter | 4–20 mA | -40°C to +85°C | Pumps and Rotating Equipment | 120 × 65 × 55 mm | 0.45 |
| 991-25-XX-02-05 | Vibration Transmitter | 4–20 mA | -40°C to +85°C | General Industrial Machinery | 120 × 65 × 55 mm | 0.45 |
| Model | Product Category | Primary Function | Operating Temperature | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 3500/15 | Power Supply Module | Rack Power Distribution | 0°C to +65°C | 241 × 24 × 242 mm | 0.85 |
| 3500/22M | Transient Data Interface | Dynamic Data Communication | 0°C to +65°C | 241 × 24 × 242 mm | 0.70 |
| 3500/42M | Proximitor Monitor | Shaft Vibration Monitoring | 0°C to +65°C | 241 × 24 × 242 mm | 0.82 |
| 3500/60 | Temperature Monitor | Multi-channel Temperature Monitoring | 0°C to +65°C | 241 × 24 × 242 mm | 0.80 |
| 3300 XL 8 mm Proximity Probe | Proximity Probe | Shaft Vibration and Position Measurement | -52°C to +177°C | Probe Diameter 8 mm, Configurable Length | 0.18 |
The Bently Nevada 991-50-XX-01-00 (284264-01) is a compact and dependable vibration transmitter developed for continuous online monitoring of rotating machinery. As a member of the 991 Vibration Transmitter Series, it integrates vibration measurement, signal conditioning, and standardized 4–20 mA analog transmission into a single field-mounted device that is easy to install and maintain.
Its rugged mechanical construction, stable electronic design, and excellent compatibility with industrial automation systems make it well suited for demanding applications across power generation, oil and gas, petrochemical processing, mining, metallurgy, water treatment, manufacturing, and many other industrial sectors.
The transmitter provides accurate and continuous vibration information that supports predictive maintenance programs, helping operators detect abnormal equipment conditions at an early stage. By enabling timely maintenance interventions, it contributes to improved machinery reliability, extended equipment service life, lower maintenance costs, reduced unplanned downtime, and higher overall production efficiency.
With its compact dimensions, low maintenance requirements, durable industrial design, and long-term operational stability, the 991-50-XX-01-00 (284264-01) represents an efficient and practical solution for industrial vibration monitoring applications requiring dependable performance and seamless integration into modern process control systems.