Bently Nevada 27482-00-50-18 Eddy Current Proximity Probe Product Specification
27482-00-50-18 is a factory pre-calibrated standard eddy current proximity probe from Bently Nevada’s industry-proven transducer series, designed in compliance with API 670 specification for critical turbomachinery protection and condition monitoring. As a core component of a complete proximity measurement system, it must be paired with specified matching extension cable and corresponding proximitor to form an intact closed-loop sensing circuit. Widely applied in power generation, petrochemical processing and metallurgical industries, this probe is installed on steam turbines, turbo-generators, centrifugal compressors and large industrial blowers to perform non-contact measurement of radial shaft vibration, thrust bearing axial displacement and Keyphasor once-per-revolution pulse pickup. Every finished probe undergoes factory linearity calibration, insulation resistance testing, alternating high-low temperature cycling aging and anti-vibration durability inspection before delivery, securing stable signal conversion and transmission under harsh operating environments featuring high temperature, lubricant oil mist and complex on-site electromagnetic interference inside bearing housings. Converted analog voltage signals proportional to shaft clearance are delivered via matched cables and proximitors to 3500 series rack monitor modules for real-time parameter tracking, pre-alarm output and safety interlock protection of key rotating equipment.
Description
Bently Nevada 27482-00-50-18 Eddy Current Proximity Probe Product Specification
1. Product Overview
27482-00-50-18 is a factory pre-calibrated standard eddy current proximity probe from Bently Nevada’s industry-proven transducer series, designed in compliance with API 670 specification for critical turbomachinery protection and condition monitoring. As a core component of a complete proximity measurement system, it must be paired with specified matching extension cable and corresponding proximitor to form an intact closed-loop sensing circuit. Widely applied in power generation, petrochemical processing and metallurgical industries, this probe is installed on steam turbines, turbo-generators, centrifugal compressors and large industrial blowers to perform non-contact measurement of radial shaft vibration, thrust bearing axial displacement and Keyphasor once-per-revolution pulse pickup. Every finished probe undergoes factory linearity calibration, insulation resistance testing, alternating high-low temperature cycling aging and anti-vibration durability inspection before delivery, securing stable signal conversion and transmission under harsh operating environments featuring high temperature, lubricant oil mist and complex on-site electromagnetic interference inside bearing housings. Converted analog voltage signals proportional to shaft clearance are delivered via matched cables and proximitors to 3500 series rack monitor modules for real-time parameter tracking, pre-alarm output and safety interlock protection of key rotating equipment.
2. Part Number Definition Breakdown
Each segmented code of 27482-00-50-18 corresponds to fixed factory-defined configuration parameters. 27482 is the base model code of this standard proximity probe product family; the segment 00 represents standard probe body structure and universal mounting thread design without customized mechanical alteration; 50 denotes the core tip specification with fixed factory-calibrated sensitivity and designated effective linear measuring range; the last code 18 specifies the overall length of the factory pre-molded integral short lead cable attached directly to the probe head. All electrical and length parameters are fixed via original factory calibration, and random replacement with non-matching cables or sensors will invalidate the whole measurement loop’s calibrated accuracy and cause measuring deviation.
3. Core Functional Characteristics
Based on high-frequency eddy current induction principle, the probe achieves fully contact-free clearance detection between sensing tip and conductive metallic target surface, completely eliminating mechanical abrasion and wear defects existing in contact-type displacement sensors. Its primary field applications cover continuous real-time radial rotor vibration monitoring, thrust pad axial position supervision and Keyphasor signal acquisition to provide phase reference data for equipment vibration spectrum analysis. The epoxy-sealed probe head features outstanding oil and high-temperature resistance to adapt long-term working inside oil-filled high-temperature bearing compartments. After matching with original designated proximitor and factory-calibrated extension cable, the complete transducer system outputs linear voltage signals corresponding to actual gap values, allowing backend monitoring modules to configure multi-stage warning and emergency trip thresholds. Once monitored displacement exceeds preset safe limits, the system triggers corresponding alarm or shutdown interlock to prevent severe mechanical breakdown of critical turbomachinery.
4. Electrical and Metrological Specifications
The full probe-cable-proximitor measurement loop is powered by regulated negative DC voltage ranging from -17.5VDC to -26VDC supplied by compatible Bently proximitor unit, conforming to the universal power standard of Bently proximity transducer systems. This probe retains fixed factory-set calibrated sensitivity and defined linear measurement range per original production specification. High-performance insulating material inside probe encapsulation and integral lead ensures superior insulation resistance to restrain signal drift induced by ambient dampness or lubricant oil permeation. The short integral lead adopts shielded coaxial construction to reduce external electromagnetic interference during signal transfer. Only original matching extension cable and specified proximitor are permitted for assembly with this probe to preserve factory preset measurement precision unchanged.
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 internal compartments of turbines and compressors. Spare part storage temperature is controlled between -55°C and +95°C under non-condensing dry storage environment; applicable working relative humidity covers 5%RH~95%RH with condensation inside probe encapsulation strictly forbidden to avoid insulation degradation and internal short-circuit risks. The probe can withstand routine industrial operating vibration from 10Hz to 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 insulation components. For installation locations above 1000 meters altitude, shortening regular inspection cycle is recommended appropriately.
6. Installation and Routine Maintenance Guidance
The probe is manufactured with standard external mounting thread for threaded-hole installation on bearing supports or customer-designed fixed brackets. Field commissioning personnel adjust probe screwing depth during installation to set correct initial clearance between probe tip and target surface in accordance with site design requirements. In periodic maintenance activities, maintenance staff regularly inspect 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 on-site replacement is required due to probe failure, only spare probe with identical part number 27482-00-50-18 can be directly installed; using mismatched alternative products will lead to linearity error and inaccurate monitoring data. All replacement probes complete full factory electrical recalibration and high-low temperature aging test before delivery to guarantee full interchangeability during equipment overhaul and system maintenance.
Get a Quote