{"product_id":"bently-nevada-24765-01-00-case-expansion-transducer-system","title":"Bently Nevada 24765-01-00 Case Expansion Transducer System","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned for critical turbomachinery asset monitoring, the \u003cstrong\u003eBently Nevada 24765-01-00\u003c\/strong\u003e Case Expansion Transducer System measures the relative thermal growth of machine housings during startup, operation, and shutdown cycles. This system provides vital mechanical growth data to prevent structural binding and alignment damage on large steam turbines, gas turbines, and industrial machinery. By utilizing a high-precision \u003cstrong\u003eLinear Variable Differential Transformer (LVDT)\u003c\/strong\u003e mechanism, the device translates linear physical displacement into a proportional electrical signal compatible with continuous machinery protection systems.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eContactless LVDT design prevents mechanical wear and preserves long-term calibration accuracy.\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty, dual-spring-loaded plunger assembly maintains continuous physical contact with the machine casing.\u003c\/li\u003e\n  \u003cli\u003eHermetically sealed sensing elements ensure reliable operation in high-humidity, steam-exposed, and dusty environments.\u003c\/li\u003e\n  \u003cli\u003eDirect compatibility with industry-standard Bently Nevada 3500\/45 Position Monitors.\u003c\/li\u003e\n  \u003cli\u003eRobust mounting structure engineered to withstand persistent high-amplitude industrial vibrations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eSteam turbine casing expansion and thermal growth monitoring.\u003c\/li\u003e\n  \u003cli\u003eGas turbine structural casing displacement tracking.\u003c\/li\u003e\n  \u003cli\u003eLarge industrial process compressor thermal expansion measurement.\u003c\/li\u003e\n  \u003cli\u003eStructural shifting and alignment monitoring in utility-grade power generation equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2d3748; text-align: left;\"\u003e\n        \u003cth style=\"padding: 0.75rem;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBently Nevada\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e24765-01-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eSensor Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLinear Variable Differential Transformer (LVDT)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eMeasurement Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1.0 in (25.4 mm) nominal\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eExcitation Frequency\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3 kHz nominal\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eOperating Temperature Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-34 to 149 degC (-30 to 300 degF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eLinearity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003ePlus or minus 0.50% of full scale range\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eMounting Configuration\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSpring-loaded plunger with foot contact\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eUnited States\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3.2 kg (7.0 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e35 x 15 x 15 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2d3748; text-align: left;\"\u003e\n        \u003cth style=\"padding: 0.75rem;\"\u003eTerminal \/ Connection Pin\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem;\"\u003eFunction \/ Circuit Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eExcitation High (+)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAC excitation voltage input positive\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eExcitation Low (-)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAC excitation voltage input return\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eSignal Out High (+)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLVDT secondary output voltage positive\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eSignal Out Low (-)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLVDT secondary output voltage return\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShield\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eInstrument ground connection \/ cable shield drain\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 24765-01-00 integrates with standard 3500\/45 position monitor channels configured specifically for LVDT sensors. Ensure the monitor firmware supports the selected range option (-01, typically 1.0 inch). If upgrading an older mechanical dial-indicator casing setup, mechanical modification of the target foot plate on the machine foundation may be required to maintain parallel alignment.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eMechanical binding is the most common failure mode for case expansion systems. If the mounting bracket flexes or is installed at an angle relative to the casing's actual direction of movement, the internal plunger can bind within its sleeve. Misalignments of more than 2 degrees can lead to measurement hysteresis and eventual shaft seizure during sudden thermal transitions.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003ePrior to final installation, use a physical calibration block to manually cycle the LVDT core and verify that the 3500 rack displays correct, linear voltage responses. Ensure that shielded, twisted-pair cable is used and that the shield is only terminated at the monitoring rack end. A floating shield at the sensor end prevents high-frequency ground loops caused by turbine frame grounding differentials.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e De-energize and lock out all machinery auxiliary power prior to mounting. Turbine casing surfaces can exceed 100 degC during operational transitions. Allow machinery to cool completely to ambient temperatures before attempting mechanical alignment, mounting, or calibration of the case expansion transducer.\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 1rem;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 0.2rem;\"\u003eVerify the mechanical stroke of the transducer plunger is smooth and completely free from physical obstruction prior to mounting.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 1rem;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 0.2rem;\"\u003eSecurely bolt the transducer mounting bracket to the machine foundation, ensuring the plunger is perfectly parallel to the direction of casing thermal growth.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 1rem;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 0.2rem;\"\u003eAdjust the mechanical pre-load slip joint so the sensor shaft is partially compressed at cold startup conditions, allowing for the maximum predicted extension.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 1rem;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 0.2rem;\"\u003eRoute wiring through high-temperature conduit, ensuring the cable shield is tied to system ground at the monitoring rack only.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666625818987,"sku":"24765-01-00","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-24765-01-00-case-expansion-transducer-systems-femf3zoanpw_2bc625bc-e50e-48b1-9b59-9e2d16e16cda.jpg?v=1765444337","url":"https:\/\/www.plcprotech.com\/tr\/products\/bently-nevada-24765-01-00-case-expansion-transducer-system","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}