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The part number 24765-03-01 designates a Bently Nevada Case Expansion Transducer Assembly (DC). This industrial sensor uses a Linear Variable Differential Transformer (LVDT) enclosed in a weatherproof housing to monitor the thermal growth of large machine casings—such as steam and gas turbines—within Turbine Supervisory Instrumentation (TSI) setups.

An important position measurement in Turbine Supervisory Instrumentation (TSi) is case expansion. Case expansion(sometimes referred to as shell expansion) is the thermalgrowth of the machine case as it expands during machinestartup and on-line operations. The case expansiontransducer system is typically mounted on the foundation atthe opposite end from where the turbine casing is attachedto the foundation and provides information about the growthof the machine case relative to the foundation.

Case expansion is a parameter that you should use a dualtransducer arrangement to measure. This arrangementprovides information about the position of the sliding feet onthe machine case. A condition that obstructs or jams onefoot could distort the case and damage the machine. Thedual case expansion transducer configuration in conjunctionwith the 3300 or 3500 monitors provides an alarm for thiscondition. The high temperature dual case expansion transducer configuration is compatible only with the 3500/45Position Monitor.

Frequently Asked Questions

Q : What is the Bently Nevada 24765-03-01?

A: It is a Direct Current (DC) Case Expansion Transducer Assembly used to measure the thermal growth of large machine casings.

Q : What is the total measurement range of the 24765-03-01?

A: The total linear stroke range is exactly 101.6 millimeters (4.00 inches).

Q : What is the accuracy or linearity of this transducer?

A: It delivers a full-range linearity error of no more than ±0.5%.

Q : What input power does the transducer require?

A: It runs on a standard +24 V DC power supply provided by the monitor rack or an external source.

Product Applications

Power industry: Large steam turbines, water pumps, and fans used in power plants.

Petrochemical industry: Monitoring of various compressors and large units used in chemical plants and oil refineries.

Metallurgical industry: High-load rotating machinery and equipment used in steel mills.