{"product_id":"bently-nevada-3300-47-xx-xx-02-00-differential-expansion-monitor-1","title":"Bently Nevada 3300\/47-XX-03-01-00 Differential Expansion Monitor","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Bently Nevada 3300\/47 Differential Expansion Monitor is a specialized rack-mount module engineered to track the relative thermal growth between a turbine rotor and its casing. By monitoring this critical clearance, the system prevents mechanical interference during startup, shutdown, and steady-state operation of large steam turbines. The unit processes signals from proximity probes to ensure real-time status monitoring and provides integrated alarm functionality to protect rotating equipment from damage.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eContinuous monitoring of rotor-to-casing differential expansion.\u003c\/li\u003e\n\u003cli\u003eIntegrated signal conditioning for proximity probe inputs.\u003c\/li\u003e\n\u003cli\u003eDual relay outputs configured for Alert and Danger alarm thresholds.\u003c\/li\u003e\n\u003cli\u003eFront-panel LED status indicators for OK, Bypass, Alert, and Danger conditions.\u003c\/li\u003e\n\u003cli\u003eDesigned for seamless integration within standard 3300 series monitoring racks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOrdering Information\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Component\u003c\/td\u003e\n\u003ctd\u003eDescription\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3300\/47\u003c\/td\u003e\n\u003ctd\u003eDifferential Expansion Monitor Base Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXX\u003c\/td\u003e\n\u003ctd\u003eMeasurement Range (Full-scale)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e03\u003c\/td\u003e\n\u003ctd\u003eProximity Probe\/Proximitor Sensor Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e01\u003c\/td\u003e\n\u003ctd\u003eDual Relay Output Configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e00\u003c\/td\u003e\n\u003ctd\u003eStandard Agency Approval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eParameter\u003c\/td\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Sensitivity\u003c\/td\u003e\n\u003ctd\u003e200 mV\/mil (8 V\/mm) or 100 mV\/mil (4 V\/mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy (Signal Conditioning)\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.33% (typical) \/ +\/- 1% (max at 25 degC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e+4 to +20 mA, +1 to +5 VDC, 0 to -10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the 3300 rack is powered down before inserting or removing the module to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eVerify that all proximity probes are correctly calibrated and connected via shielded cabling to minimize EMI interference.\u003c\/li\u003e\n\u003cli\u003eModule should be installed in a clean, dry environment within the specified temperature range to ensure long-term reliability.\u003c\/li\u003e\n\u003cli\u003eEnsure proper grounding of the 3300 system chassis to the main plant instrumentation ground bus.\u003c\/li\u003e\n\u003cli\u003eCheck all terminal connections for tightness and ensure wire routing avoids high-voltage power lines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 3300\/47 monitor?\u003c\/h3\u003e\u003cp\u003eThis module measures the differential thermal expansion between a turbine rotor and its casing, providing critical data to prevent mechanical contact or damage during thermal transitions.\u003c\/p\u003e\u003ch3\u003eWhat type of sensors does this module support?\u003c\/h3\u003e\u003cp\u003eThe 3300\/47-XX-03-01-00 is specifically configured to interface with proximity probes and their associated Proximitor sensors.\u003c\/p\u003e\u003ch3\u003eDoes this unit include alarm relays?\u003c\/h3\u003e\u003cp\u003eYes, this specific model includes dual relay outputs that are activated based on configured Alert and Danger setpoints.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":48832414843070,"sku":"3300\/47-XX-03-01-00","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/wm_1_c43db657-0fd3-4719-85be-708fdf08c53b.jpg?v=1788381041","url":"https:\/\/www.autooiltech.com\/products\/bently-nevada-3300-47-xx-xx-02-00-differential-expansion-monitor-1","provider":"AutoOilTech Limited","version":"1.0","type":"link"}