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Bently Nevada 991-25-70-01-00 991 Thrust Transmitter
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Product Introduction
The Bently Nevada 991 Thrust Transmitter (Model: 991-25-70-01-00) is a compact signal conditioning device designed for axial position (thrust) measurement in rotating machinery. It converts the raw signal from an eddy current proximity probe into a standardized output suitable for control systems, protection systems, and distributed control systems (DCS).
This transmitter is typically used in applications where monitoring shaft axial displacement is critical for machinery protection, such as turbines, compressors, and pumps. It provides a reliable interface between the proximity probe system and plant control infrastructure, ensuring accurate and stable signal transmission.
The 991 Thrust Transmitter is engineered for industrial environments, offering robust performance under vibration, temperature variation, and electrical interference. Its compact design allows easy installation in control panels or field enclosures, making it suitable for both new installations and retrofit projects.
Product Specifications
| Parameter | Value |
|---|---|
| Product Type | Thrust Transmitter |
| Series | 991 Series |
| Model Number | 991-25-70-01-00 |
| Function | Axial position (thrust) signal conditioning |
| Input Signal | Eddy current proximity probe signal |
| Output Signal | Standard industrial analog output (e.g., 4–20 mA) |
| Measurement Type | Shaft axial displacement |
| System Compatibility | Bently Nevada proximity probe systems |
| Mounting Type | Panel or DIN rail mounting |
| Electrical Interface | Industrial terminal connections |
| Operating Environment | Industrial control systems |
| Environmental Resistance | Vibration and EMI resistant design |
| Dimensions | 100.1 x 73.9 x 53.3 mm |
| Weight | 0.43 kg |
Applications
• Steam and gas turbine systems
Provides accurate monitoring of shaft axial position to prevent thrust bearing damage.
• Compressor protection systems
Enables detection of axial movement caused by load changes or mechanical faults.
• Pump monitoring systems
Supports continuous tracking of shaft thrust position and bearing condition.
• Industrial control systems (DCS/PLC)
Converts probe signals into standard analog outputs for system integration.
• Retrofit monitoring solutions
Used to upgrade existing systems with modern signal conditioning and output capabilities.
Advantages
• Accurate thrust measurement
Provides reliable conversion of probe signals into precise axial displacement data.
• Standardized output signal
Offers industry-standard analog output for easy integration with control systems.
• Compact and flexible installation
Small form factor allows installation in control panels or field enclosures.
• Strong noise immunity
Designed to resist electromagnetic interference in industrial environments.
• High system compatibility
Works seamlessly with Bently Nevada proximity probe systems.
• Reliable long-term operation
Built for continuous use in critical machinery protection applications.
FAQ
- What is the main function of the 991 Thrust Transmitter?
It converts the signal from a proximity probe into a standardized output representing shaft axial displacement. - Why is thrust measurement important in rotating machinery?
Monitoring axial position helps prevent thrust bearing damage and detects abnormal shaft movement. - What type of output signal does this transmitter provide?
It typically provides a standard analog signal such as 4–20 mA for integration with control systems. - Can it be used with any proximity probe?
It is designed for use with compatible Bently Nevada proximity probe systems. - Where is this transmitter typically installed?
It is usually installed in control panels or near machinery as part of a monitoring system. - How does it improve system reliability?
By providing stable and accurate signal conversion, it ensures consistent monitoring data for protection systems. - Is calibration required?
Yes, proper calibration is necessary to ensure accurate conversion of probe signals into displacement values. - Can it operate in harsh environments?
Yes, it is designed for industrial environments with vibration, electrical noise, and temperature variations. - What happens if the input signal is unstable?
Unstable input signals can lead to inaccurate output, so proper probe installation and wiring are critical. - What are common installation issues?
Incorrect wiring, poor grounding, and improper calibration are the most common issues affecting performance.
Related Models
| Model | Description |
|---|---|
| 991-01-50-01-00 | Standard thrust transmitter variant |
| 991-25-50-01-00 | Alternate output configuration |
| 991-25-70-02-00 | Extended functionality version |
| 991-10-70-01-00 | Compact configuration model |
| 991-25-70-01-01 | Modified interface version |
| 991-30-70-01-00 | High-range measurement model |
Popular Models
| Model | Description |
|---|---|
| 3300 XL 8mm Probe | Standard proximity probe |
| 330180-90-00 | Proximitor sensor |
| 330130-040-00 | Extension cable |
| 3500/42M | Vibration monitoring module |
| 3500/22M | Interface module |
| 3300 XL NSv Probe | Compact probe system |
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
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