Bently Nevada 27482-00-50-10 Eddy Current Proximity Probe Product Specification
27482-00-50-10 is factory pre-calibrated standard eddy current proximity probe from Bently Nevada transducer series, developed in accordance with API 670 standard for critical turbomachinery protection and condition monitoring. As a core component of complete proximity measuring system, it must cooperate with matching calibrated extension cable and designated proximitor to form an intact closed signal loop. Widely applied in power, petrochemical and metallurgical industries for steam turbines, turbo-generators, centrifugal compressors and large industrial blowers, the probe realizes non-contact measurement of radial shaft vibration, thrust bearing axial displacement and Keyphasor once-per-revolution pickup signal. Every finished probe passes linearity calibration, insulation resistance inspection, high-low temperature cycling aging and vibration durability test before factory shipment to ensure stable signal conversion under harsh working conditions with high temperature, lubricating oil mist and complex electromagnetic interference inside bearing housings. Gap variation between probe tip and conductive metal target is converted into proportional analog voltage, which is transmitted to 3500 rack monitoring modules for real-time data acquisition, pre-alarm triggering and equipment safety interlock control.
Description
Bently Nevada 27482-00-50-10 Eddy Current Proximity Probe Product Specification
1. Product Overview
27482-00-50-10 is factory pre-calibrated standard eddy current proximity probe from Bently Nevada transducer series, developed in accordance with API 670 standard for critical turbomachinery protection and condition monitoring. As a core component of complete proximity measuring system, it must cooperate with matching calibrated extension cable and designated proximitor to form an intact closed signal loop. Widely applied in power, petrochemical and metallurgical industries for steam turbines, turbo-generators, centrifugal compressors and large industrial blowers, the probe realizes non-contact measurement of radial shaft vibration, thrust bearing axial displacement and Keyphasor once-per-revolution pickup signal. Every finished probe passes linearity calibration, insulation resistance inspection, high-low temperature cycling aging and vibration durability test before factory shipment to ensure stable signal conversion under harsh working conditions with high temperature, lubricating oil mist and complex electromagnetic interference inside bearing housings. Gap variation between probe tip and conductive metal target is converted into proportional analog voltage, which is transmitted to 3500 rack monitoring modules for real-time data acquisition, pre-alarm triggering and equipment safety interlock control.
2. Part Number Definition Breakdown
Each code segment of 27482-00-50-10 defines fixed factory configuration parameters respectively. 27482 stands for base model series of standard eddy current proximity probe; 00 refers to standard probe body structure and universal mounting thread without special customized mechanical modification; 50 indicates standard tip specification with fixed factory calibrated sensitivity and corresponding linear measuring range; the last segment 10 specifies total length of factory pre-molded integral short pigtail cable connected directly with probe head. All length and capacitance parameters are locked by original factory calibration, and random replacement of mismatched cable or sensor will invalidate whole measuring loop’s calibration accuracy and cause measurement error.
3. Core Functional Characteristics
Working on high-frequency eddy current induction principle, the probe converts clearance change between sensing tip and rotating metal target into linear analog output with zero mechanical contact, avoiding abrasion failure of contact type displacement sensors. Main field applications include long-term radial vibration monitoring of rotating rotor, thrust pad axial position tracking and Keyphasor signal collection to provide phase reference for vibration spectrum analysis. The epoxy sealed probe head features excellent high temperature and oil resistance to sustain continuous operation inside oil-filled high-temperature bearing housing. After assembling with original matched proximitor and factory-calibrated extension cable, the complete transducer system outputs voltage linearly corresponding to actual gap value, enabling backend monitor modules to set multi-level warning and shutdown thresholds. Once measured displacement exceeds preset safety limit, the system activates corresponding alarm or emergency interlock to prevent severe mechanical damage of critical rotating equipment.
4. Electrical and Metrological Specifications
The full probe-cable-proximitor loop is powered by standard negative DC voltage from -17.5VDC to -26VDC supplied by matching Bently proximitor, complying with universal Bently proximity sensor power specification. The probe keeps fixed factory-set calibrated sensitivity and defined effective linear measurement range according to original design standard. Premium high-performance insulating material inside probe encapsulation and integral lead ensures high insulation resistance to suppress signal drift induced by damp infiltration or oil soaking. The short integral pigtail adopts full shielded coaxial construction to reduce external electromagnetic interference during signal transmission. Only designated original matching proximitor and corresponding calibrated extension cable can be matched with this probe to retain original factory measuring precision.
5. Environmental Working Parameters
Continuous allowable operating temperature of probe body ranges from -40°C up to +177°C, suitable for high-temperature installation near bearing pedestals and equipment inner compartments of turbines and compressors. Spare storage temperature is controlled between -55°C and +95°C under non-condensing dry ambient condition; applicable working relative humidity covers 5%RH~95%RH and dew condensation penetrating into probe inner structure is strictly forbidden to avoid insulation deterioration and internal short-circuit fault. The probe can withstand regular industrial vibration of 10Hz~2kHz generated by running rotating equipment; long-term continuous exposure to strong corrosive gas and persistent hot steam immersion is prohibited to extend service life of internal sensing coil and insulating components. For installation above 1000 meters altitude, properly shorten routine inspection cycle.
6. Installation and Routine Maintenance Guidance
The probe is equipped with standard external mounting thread for screwing installation on bearing support or customized fixed bracket. Field commissioning personnel adjust screwing depth carefully to set proper initial clearance between probe tip and target surface according to site technical requirements. During periodic maintenance, regularly check probe mounting tightness, integral lead sheath integrity and connector fastening status to eliminate hidden intermittent signal faults caused by loose connection or cable aging damage. When field replacement is needed, only spare probe with identical part number 27482-00-50-10 is allowed for direct swap. All replacement probes complete full factory parameter recalibration and alternating high-low temperature aging test before delivery to guarantee full interchangeability during equipment overhaul and system maintenance.
Get a Quote