{"product_id":"bently-nevada-3300-45-dual-differential-expansion-monitor","title":"Bently Nevada 3300\/45 Dual Differential Expansion Monitor","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 3300\/45 Dual-Channel Differential Expansion Monitor\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a dual-channel monitor designed for the legacy\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 3300 Monitoring System\u003c\/strong\u003e.\u003cbr\u003eIt is specifically engineered to measure\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDifferential Expansion\u003c\/strong\u003e, defined as the relative axial movement between the turbine shaft and the casing.\u003c\/p\u003e\n\u003cp\u003eThis parameter is critical for large steam turbines during startup and shutdown, where thermal expansion rates differ between rotating and stationary components. Accurate monitoring helps prevent rotor-to-casing contact, mechanical stress, and potential turbine damage.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003e1. Input \u0026amp; Signal Processing\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTransducer Input\u003c\/strong\u003e\u003cbr\u003eAccepts signals from non-contacting proximity probes, including:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e8 mm Proximitor System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e11 mm Proximitor System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e25 mm Proximitor System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e50 mm Proximitor System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMeasurement Modes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe monitor supports multiple configuration methods depending on the mechanical design:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Single Composite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eUses one probe to measure a tapered collar or ramp surface\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommon in compact turbine designs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDual Complementary\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eUses two probes to increase measurement linearity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProvides redundancy for critical protection systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e±0.33% of full-scale (typical)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReference temperature:\u003cbr\u003e\u003cstrong\u003e+25°C (+77°F)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e2. Outputs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRecorder Outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUser-programmable signal formats:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e+4 to +20 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e0 to -10 Vdc\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e+1 to +5 Vdc\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBuffered Outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eFront panel: Coaxial connectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRear panel: Terminal block connections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOne output per channel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e100 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e3. Alarms \u0026amp; Display\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDual vertical bargraph LCD indicators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReal-time differential expansion visualization\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlarm Setpoints\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBi-directional alarm configuration:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eAlert Alarm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDanger Alarm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDigitally adjustable thresholds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOK Indicator\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe OK LED monitors the health status of:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMonitor electronics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConnected transducers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eField wiring integrity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOrder Format\u003c\/strong\u003e\u003c\/p\u003e\n\u003cpre class=\"overflow-visible! px-0!\"\u003e3300\/45-AXX-BXX-CXX-DXX-EXX\u003cbr\u003e\u003c\/pre\u003e\n\u003ch3\u003eA — Full-Scale Range Option\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eCode\u003c\/th\u003e\n\u003cth class=\"\"\u003eMeasurement Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003e0.1-0-0.1 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003e0.2-0-0.2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e03\u003c\/td\u003e\n\u003ctd\u003e0.3-0-0.3 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e04\u003c\/td\u003e\n\u003ctd\u003e0.4-0-0-0.4 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e2.0-0-2.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e4.0-0-4.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e8.0-0-8.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e10-0-10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eB — Transducer Input Option\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eCode\u003c\/th\u003e\n\u003cth class=\"\"\u003eCompatible Proximitor System\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003e8 mm or 11 mm (200 or 100 mV\/mil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003e25 mm (50 mV\/mil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e03\u003c\/td\u003e\n\u003ctd\u003e50 mm (25 mV\/mil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e04\u003c\/td\u003e\n\u003ctd\u003e7200 14 mm (100 mV\/mil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eC — Alarm Relay Option\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eCode\u003c\/th\u003e\n\u003cth class=\"\"\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e00\u003c\/td\u003e\n\u003ctd\u003eNo relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003eEpoxy-sealed relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003eHermetically-sealed relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e03\u003c\/td\u003e\n\u003ctd\u003eQuad relay (Epoxy-sealed only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eD — Agency Approval Option\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eCode\u003c\/th\u003e\n\u003cth class=\"\"\u003eCertification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e00\u003c\/td\u003e\n\u003ctd\u003eNot required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003eCSA \/ NRTL \/ C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003eATEX self-certification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eE — Safety Barrier Option\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eCode\u003c\/th\u003e\n\u003cth class=\"\"\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e00\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003eExternal barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003eInternal barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eEngineering \u0026amp; Installation Guide\u003c\/h2\u003e\n\u003ch3\u003eTapered Collar Configuration\u003c\/h3\u003e\n\u003cp\u003eWhen a single probe is installed on a tapered collar:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe collar angle must be accurately configured in the monitor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis ensures correct linear conversion from displacement to expansion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIncorrect angle configuration will directly affect measurement accuracy.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCold vs. Hot Zero Reference\u003c\/h3\u003e\n\u003cp\u003eDifferential expansion monitoring follows a standard baseline method:\u003c\/p\u003e\n\u003cp\u003eCold condition:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe system is zeroed during machine startup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShaft and casing temperatures are stable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHot condition:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe monitor tracks expansion as thermal growth occurs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReal-time displacement is calculated relative to the cold reference\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis method is standard practice for steam turbine protection systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eRelay Voting Strategy (Recommended for Critical Turbines)\u003c\/h3\u003e\n\u003cp\u003eFor high-integrity protection systems:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAND voting logic (2-out-of-2)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis recommended.\u003c\/p\u003e\n\u003cp\u003eThis configuration ensures:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eA single probe failure will not trigger a false trip\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoth channels must confirm an alarm condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis approach is widely used in turbine protection architectures.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eProbe Linearity Considerations\u003c\/h3\u003e\n\u003cp\u003eLarge-range proximity probes require precise mechanical setup.\u003c\/p\u003e\n\u003cp\u003eImportant differences:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e25 mm and 50 mm probes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eHave a wider measurement range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRequire specific initial gap settings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhibit different linear regions compared to standard 8 mm probes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImproper probe gapping may result in:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eReduced measurement accuracy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNon-linear output response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFalse alarm conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666852999531,"sku":"3300\/45","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-3300-45-dual-differential-expansion-monitor-qopi2y5bigd_db33166e-83e4-4748-8b37-e0fd75bd5170.jpg?v=1765449102","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-3300-45-dual-differential-expansion-monitor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}