Bently Nevada 24765-01-01 Case Expansion Transducer Assembly
Price:
66USD
MOQ:
1
Delivery Time:
2-3 work days
Brand:
Bently Nevada
Product Description
Bently Nevada 24765-01-01 Case Expansion Transducer Assembly
The 24765-01-01 refers to a specific model of the Case Expansion Transducer Assembly manufactured by Bently Nevada. It is a precision industrial sensor used to measure the thermal growth of large rotating machinery casings, such as steam turbines, relative to their foundations.
Technical Specifications
| Input Power | +24 Vdc, 30 mA minimum |
| Scale Factor | 0.346 V/mm (8.79 V/in) |
| Linear Range | ± 12.7 mm (±0.5 in) |
| -3 dB Frequency | 20 Hz |
| Minimum Load Resistance | 50 kΩ |
| Body Length | 171 mm (6.75 in) |
| Body End to Null Center | 69.3 mm (2.73 in) |
| Core Length | 80 mm (3.15 in) |
| Linear Range | 25.4 mm (1.0 in) |
| Spring | With spring return |
| Operating Temperature | -18 °C to +71 °C (0 °F to +160 °F) |
| Storage Temperature | -54 °C to +93° C (-65 °F to +200 °F) |
Key Features
- LVDT Technology: LVDT structure is basically frictionless, so there’s no physical contact wear. In real use, that usually means the signal stays stable for a long time without drifting too much.
- Spring-Loaded Design: The “-01” spring-loaded return design keeps the probe tip constantly touching the target surface. Even when there’s vibration or thermal expansion in the machine, it doesn’t really lose contact, which is pretty important in rotating equipment areas.
- Precision Accuracy: Output is nicely linear, around 0.346 V/mm over the full 25.4 mm stroke. In practice, it’s straightforward for monitoring or protection systems—no heavy compensation work needed.
- Robust Construction: Housing is built for rough environments. It can handle temperature swings, oil mist, dust, that kind of thing. Once it’s inside a NEMA 4 or IP-rated enclosure, it’s usually fine for long-term field operation.
- Seamless Integration: It integrates directly with the Bently Nevada 3500/45 Position Monitor. So alarms and trip logic can be set up pretty cleanly, no extra signal conversion hassle in most cases.
- DC Powered: Power is standard +24 Vdc, which makes wiring simple. Most control cabinets already have it available, so installation is usually pretty quick and straightforward.
Applications
- Steam Turbine Shell Expansion: The primary use case. It monitors how much the turbine casing grows as it heats up during startup to ensure it doesn't bind on its sliding feet (often called "Pedestal Growth").
- Gas Turbine Thermal Monitoring: Monitors the axial growth of the turbine frame to maintain proper internal clearances between stationary and rotating components.
- Differential Expansion Support: Used in conjunction with rotor expansion sensors to calculate "Differential Expansion"—the difference between how much the rotor grows versus the casing.
- Large Compressor Housings: Employed on high-pressure compressors in oil and gas plants where extreme temperature changes cause significant metal movement.
- Structural Displacement: Sometimes used in large industrial structures or boilers to monitor movement relative to a fixed foundation.
Frequently Asked Questions
- What does 24765-01-01 mean in the suffix?
For 24765-01-01, the first “01” is basically telling you the linear range is 25.4 mm (1 inch). The second “01” means spring-return type. So in practice, 24765-01-01 always keeps the probe in contact with the surface without needing extra mechanical linkage. - Power requirement of 24765-01-01
Nothing special here, it runs on standard +24 Vdc. Current draw is low, around 30 mA. So 24765-01-01 can go straight into most modern PLC cabinets or Bently Nevada 3500/45 systems without extra conversion. - How to read scale factor on 24765-01-01
The output is pretty straight: 0.346 V/mm (or 8.79 V/in). For 24765-01-01, when the probe travels full stroke, voltage changes linearly, so the system can directly translate that into displacement. No heavy calibration tricks needed. - Can 24765-01-01 work in steam turbine or high temp area?
Yes, it’s commonly used in power plants. Normal rating is -18 °C to +71 °C. For hotter zones, 24765-01-01 is usually mounted with a thermal barrier or protective housing. People don’t really avoid it, just install it smarter. - What is the null center in 24765-01-01?
It’s the electrical zero point of the LVDT. On 24765-01-01, it sits around 69.3 mm from the body end. During setup, you align it so the core is at null when the machine is in its baseline condition—gives you balanced measuring range both sides. - Frequency response of 24765-01-01 and why it matters
Around 20 Hz (-3 dB). For 24765-01-01 this is actually enough, because casing expansion is slow. It naturally filters out fast vibration noise, so the signal you get is cleaner and more stable for monitoring.
Compatible Products
| 3500/42M 176449-02 | 330703-000-060-10-02-00 |
| 3500/15 AC 127610-01 | 330103-00-09-10-02-00 |
| 128276-01E 131151-01 | 135813-01 |
| 18745-04 | 990-05-XX-01-00 |
| 330102-22-58-10-02-00 | 330180-X1-05 MOD:145004-02 |
| 330910-03-09-05-02-05 | 133323-01 |
| 330709-000-070-10-02-00 | 330905-00-08-10-02-00 |
| 3500/61 163179-02 | 990-04-50-01-00 |
| 1900/65A 172323-01/1900/65A 167699-02 | 330101-XX-XX-10-02-05 MOD:147773-00-12 |
| 3500/15 106M1079-01 | 330104-00-04-10-02-00 |
| 3500/65 145988-02 | 330104-00-06-10-02-00 |
| 3500/92 136180-01 | 330851-04-000-023-10-01-05 |
| 3500/94 145988-01 | 330910-05-10-02-00 |
| 330104-00-10-10-02-05 | 330101-00-16-10-02-00 |
| 330910-00-05-10-02-00 | 3300/12 |
| 3500/44M 176449-03 | 330850-50-05 |
| TK3-2E 14700-02A | 330730-080-00-00 |
| 3500/42M 140734-02 | 330930-040-01-00 |
| 3500/92 | 990-08-XX-01-00 |
| 330103-00-05-10-02-00 | 330130-040-03-00 |
Contact Information
Please contact Miya Zheng.
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Company
AMIKON LIMITED
Location
32D units,GuoMao Building No 388 Hubin South Road Siming district Xiamen, Fujian China
Contact Person
Miya