{"product_id":"330850-51-cn-bently-nevada-3300-xl-25-mm-series-proximitor-sensor","title":"330850-51-CN Bently Nevada 3300 XL 25 mm Series Proximitor Sensor","description":"\u003cp\u003eConfigured for displacement and vibration measurements in machinery protection systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 330850-51-CN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e330850\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProximitor Sensor) provides direct physical\/electrical execution. This signal conditioning hardware processes high-frequency carrier signals from a 25 mm proximity probe, converting inductive impedance changes into a proportional voltage output ranging from -2 VDC to -18 VDC. The unit serves as the interface between the transducer and monitoring instrumentation, supporting continuous observation of shaft dynamic behavior.\u003c\/p\u003e\n\u003ch3\u003ePart Number Configuration\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e330850\u003c\/strong\u003e: 3300 XL 25 mm Proximitor Sensor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e51\u003c\/strong\u003e: System length option (5.0 meters \/ 16.4 feet system).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCN\u003c\/strong\u003e: Agency approval option (China-specific compliance).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e330850-51-CN\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.22 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8.8 cm x 6.0 cm x 6.5 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-35 deg C to +85 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-18 VDC to -24 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMeasurement Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0 mm to 3.0 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSensitivity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.87 V\/mm (200 mV\/mil) +\/- 5%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFrequency Response\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 Hz to 10 kHz (+\/- 1 dB)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEddy-Current Probe Scaling and Rotor Dynamics\u003c\/h3\u003e\n\u003cp\u003eThe 25 mm proximity sensing system is optimized for target surfaces where large gap measurements are required. Accurate eddy-current probe scaling is mandatory, requiring the system to be calibrated against AISI 4140 steel. Field technicians must perform gap voltage validation (-10 VDC targets) at the Proximitor output during setup to ensure the probe tip is centered within the 1.0 mm to 3.0 mm linear range. Proper scaling is critical for reliable rotor dynamics analysis, particularly when monitoring large-clearance fluid-film bearings. Cross-talk suppression must be enforced by maintaining required spatial separation between multiple sensors to prevent electromagnetic interference within the high-frequency measurement loop.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1 330850-51-CN Proximitor Sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 Technical Data Sheet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 Installation Reference Guide\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSecure the Proximitor to a DIN-rail or standard mounting plate within a clean, dry enclosure to ensure long-term stability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure the mounting surface is grounded to a common instrumentation reference to minimize electrical noise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring and Signal Integrity\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eUtilize shielded twisted-pair cabling for all output signal paths to the monitor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain physical separation from high-voltage AC cables to avoid signal degradation or induction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify that the -18 VDC to -24 VDC power supply remains within the specified range to avoid output voltage clipping.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eIs the Proximitor output signal compatible with PLC analog input cards?\u003c\/p\u003e\n\u003cp\u003eThe output is a negative DC voltage. A signal converter or an appropriate negative-voltage-capable analog input module is required for integration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this Proximitor be used with a 5 m or 9 m system cable?\u003c\/p\u003e\n\u003cp\u003eThe model 330850-51-CN is specifically calibrated for a 5.0 m system length; deviation from this length will alter the system impedance and calibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the device hot-swappable during system operation?\u003c\/p\u003e\n\u003cp\u003eThe sensor can be removed while the loop is powered, but this will trigger a channel fault or \"Not OK\" status in the connected monitoring system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow do I verify the linear range in the field?\u003c\/p\u003e\n\u003cp\u003eUsing a static calibration fixture or a manual micrometer, verify the voltage change matches the 7.87 V\/mm sensitivity as the probe moves through the 1-3 mm range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the supply voltage drops below -18 VDC?\u003c\/p\u003e\n\u003cp\u003eThe Proximitor will fail to maintain the necessary carrier wave amplitude, resulting in increased signal noise or complete loss of the output voltage signal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this sensor support HART or digital communication protocols?\u003c\/p\u003e\n\u003cp\u003eNo, the 330850 is a purely analog signal conditioning device and does not support digital handshaking or HART protocol modulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should I clean the coaxial connector during installation?\u003c\/p\u003e\n\u003cp\u003eUse a clean, dry, non-conductive electronic contact cleaner. Ensure no residue remains, as it can cause impedance shifts in the high-frequency path.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the impact of an \"Open\" or \"Short\" circuit in the probe lead?\u003c\/p\u003e\n\u003cp\u003eAn open or short circuit will cause the Proximitor output to swing to the negative supply rail or ground, triggering an \"Not OK\" status in the monitor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026840080557,"sku":"330850-51-CN","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/330850-51-CN_1.jpg?v=1782723119","url":"https:\/\/www.maxwellplc.com\/ru\/products\/330850-51-cn-bently-nevada-3300-xl-25-mm-series-proximitor-sensor","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}