Bently Nevada 28400-00-10-36-02 Eddy Current Proximity Probe Product Specification
28400-00-10-36-02 is a factory pre-calibrated standard eddy current proximity probe from Bently Nevada 10mm transducer series, designed per API 670 specification for turbomachinery supervisory instrumentation and machinery protection systems. As a critical component of complete proximity measurement loop, it must work with matched extension cable and compatible proximitor to form a full sensing system widely used in thermal power, petrochemical and metallurgical industries for steam turbines, turbo-generators, centrifugal compressors and large industrial blowers. The probe converts clearance variation between sensing tip and metallic rotating target into linear analog voltage signals for radial vibration, axial displacement and Keyphasor pickup measurement. Each finished product passes factory linearity calibration, high-low temperature cycling aging test, insulation inspection and vibration durability test before delivery to maintain stable performance under harsh on-site conditions with high temperature, oil mist and complex electromagnetic interference. Processed signals are transmitted to 3500 series rack monitoring modules for real-time measurement, abnormal alarm and safety interlock protection.
Description
Bently Nevada 28400-00-10-36-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
28400-00-10-36-02 is a factory pre-calibrated standard eddy current proximity probe from Bently Nevada 10mm transducer series, designed per API 670 specification for turbomachinery supervisory instrumentation and machinery protection systems. As a critical component of complete proximity measurement loop, it must work with matched extension cable and compatible proximitor to form a full sensing system widely used in thermal power, petrochemical and metallurgical industries for steam turbines, turbo-generators, centrifugal compressors and large industrial blowers. The probe converts clearance variation between sensing tip and metallic rotating target into linear analog voltage signals for radial vibration, axial displacement and Keyphasor pickup measurement. Each finished product passes factory linearity calibration, high-low temperature cycling aging test, insulation inspection and vibration durability test before delivery to maintain stable performance under harsh on-site conditions with high temperature, oil mist and complex electromagnetic interference. Processed signals are transmitted to 3500 series rack monitoring modules for real-time measurement, abnormal alarm and safety interlock protection.
2. Part Number Definition Breakdown
Each dash-divided segment of 28400-00-10-36-02 stands for fixed configuration parameters. 28400 is the base model code of standard 10mm eddy current probe product family; the second code 00 represents standard probe body structure and universal mounting thread without customized mechanical modification; 10 indicates 10mm nominal probe tip specification with corresponding factory fixed sensitivity and standard linear measuring range; 36 defines the total length of factory pre-molded integral lead cable directly attached to probe body; the final 02 specifies coaxial connector style, outer cable sheath material and factory calibrated grade for system matching requirement.
3. Core Functional Characteristics
Based on high-frequency eddy current induction principle, the probe achieves fully non-contact gap measurement with zero mechanical abrasion between probe head and rotating shaft surface. Its primary applications include continuous radial shaft vibration monitoring, thrust bearing axial position tracking and once-per-revolution Keyphasor signal collection to provide phase reference for vibration spectrum analysis. Cooperated with matched proximitor and backend monitor module, users can configure multi-stage warning and trip thresholds; once actual displacement exceeds preset safe limit, the system activates alarm or emergency shutdown interlock to avoid severe mechanical damage of critical rotating equipment. The sealed encapsulated probe head structure is resistant to oil contamination and high ambient temperature inside bearing housings to support long-term uninterrupted field operation.
4. Electrical and Metrology Specifications
The complete probe-cable-proximitor loop is powered by regulated negative DC voltage ranging from -17.5VDC to -26VDC supplied by matching proximitor, complying with universal Bently proximity sensor power standard. This 10mm series probe has fixed factory-calibrated sensitivity and defined effective linear measurement range to satisfy conventional vibration and displacement monitoring of most industrial turbomachinery. Internal coil is wrapped with high-performance insulating material to keep superior insulation resistance and effectively reduce signal drift caused by dampness or oil infiltration. The integral lead cable adopts full shielded coaxial structure to suppress external electromagnetic interference during long-distance signal transmission from field equipment to control cabinet. Only original designated extension cable and same-series proximitor can be assembled with this probe to preserve original factory calibration accuracy.
5. Environmental Working Parameters
Continuous allowable operating temperature of probe body ranges from -40℃ up to +177℃, adapting high-temperature installation inside turbine and compressor bearing housings. Spare storage temperature is between -55℃ and +95℃ under non-condensing ambient environment. Applicable working relative humidity is limited from 5%RH to 95%RH, and condensation inside probe encapsulation is strictly forbidden to prevent insulation deterioration and internal short-circuit. The probe can withstand regular industrial vibration of 10Hz to 2kHz during normal unit running; long-term continuous exposure to strong corrosive gas and persistent hot steam immersion is prohibited to extend service life of internal coil and encapsulation materials. For installation above altitude of 1000 meters, shortening regular maintenance inspection cycle is recommended.
6. Installation and Routine Maintenance Guidance
The probe is designed with standard external mounting thread for screwing installation on bearing pedestal or customized fixed bracket. Field commissioning personnel adjust screwing depth to set proper initial gap between probe tip and target surface according to construction technical requirements. During periodic maintenance, check probe mounting tightness, cable outer sheath integrity and connector locking status regularly to prevent intermittent signal faults caused by loose connection or cable aging damage. When on-site replacement is required, only spare probe with identical part number 28400-00-10-36-02 is allowed for direct swap; mismatched alternative will cause measuring linearity error and inaccurate monitoring data. All replacement probes complete full factory recalibration and alternating high-low temperature aging test before delivery to guarantee full interchangeability during equipment overhaul.
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