Bently Nevada 22810-00-05-05-02 Eddy Current Proximity Probe Product Specification
22810-00-05-05-02 is a factory pre-calibrated standard 8 mm eddy current proximity probe from Bently Nevada’s classic 3300XL transducer series, designed for non-contact online measurement of rotor radial vibration and small-range axial displacement on critical rotating machinery. When matched with original calibrated extension cable and designated proximitor preamplifier, the probe converts clearance variation between probe tip and conductive metal target into linear analog voltage signal, which is fed into 3300 or 3500 rack monitoring modules for real-time condition monitoring, pre-alarm setup and emergency trip interlock protection. This product is widely applied to steam turbines, gas turbines, centrifugal compressors, large generators and high-speed process pumps across power generation, petrochemical and metallurgical industries. Each finished probe undergoes strict linearity calibration, high-low temperature cycling aging test and hermetic sealing inspection before factory delivery to ensure stable measuring accuracy under harsh field environments featuring high ambient temperature, lubrication oil mist and complex industrial electromagnetic interference inside bearing housings.
Description
Bently Nevada 22810-00-05-05-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
22810-00-05-05-02 is a factory pre-calibrated standard 8 mm eddy current proximity probe from Bently Nevada’s classic 3300XL transducer series, designed for non-contact online measurement of rotor radial vibration and small-range axial displacement on critical rotating machinery. When matched with original calibrated extension cable and designated proximitor preamplifier, the probe converts clearance variation between probe tip and conductive metal target into linear analog voltage signal, which is fed into 3300 or 3500 rack monitoring modules for real-time condition monitoring, pre-alarm setup and emergency trip interlock protection. This product is widely applied to steam turbines, gas turbines, centrifugal compressors, large generators and high-speed process pumps across power generation, petrochemical and metallurgical industries. Each finished probe undergoes strict linearity calibration, high-low temperature cycling aging test and hermetic sealing inspection before factory delivery to ensure stable measuring accuracy under harsh field environments featuring high ambient temperature, lubrication oil mist and complex industrial electromagnetic interference inside bearing housings.
2. Part Number Definition Breakdown
Each segmented code of 22810-00-05-05-02 corresponds to fixed factory configuration parameters. The base code 22810 stands for standard 8 mm diameter proximity probe base platform of Bently 3300XL product line; the first suffix segment 00 defines probe body thread specification and mounting mechanical dimension; the second segment 05 represents the core calibrated configuration for standard 8 mm sensing head with fixed sensitivity parameter; the third segment 05 specifies factory pre-molded integral cable length of 5 meters; the final segment 02 indicates FEP insulated unarmored coaxial cable and standard factory connector type. Probes with any differing segment codes carry distinct calibration and mechanical parameters and cannot be directly replaced on-site without full-loop recalibration, which will cause measuring deviation and improper protection action of the whole monitoring channel.
3. Core Functional Characteristics
The probe sensing tip and threaded mounting body are manufactured from integrated stainless steel with outstanding mechanical strength and resistance against oil erosion and weak corrosive vapor inside bearing compartments. Internal induction coil is fixed with high-temperature epoxy potting to eliminate internal air gaps, effectively avoiding coil displacement or inter-turn short-circuit induced by long-term equipment vibration and ambient temperature fluctuation. Equipped with industry-standard 75-ohm coaxial cable with high-temperature FEP outer insulation, the integral cable provides superior anti-interference performance during signal transmission. Only when assembled with factory-certified matching extension cable and corresponding calibrated proximitor can the complete transducer system retain original factory linear calibration characteristic, supporting backend monitor modules to configure safe threshold values for machinery over-vibration protection. Loosening prevention structural design avoids thread loosening caused by long-period runtime vibration of rotating equipment. Abnormal open or short circuit of probe loop can be identified through abnormal output voltage variation for convenient field troubleshooting.
4. Electrical and Metrological Specifications
The full transducer system relies on regulated negative DC power ranging from -17.5 VDC to -26 VDC supplied by matched proximitor, with typical operating voltage at -24 VDC. Factory locked fixed sensitivity is 7.87 V/mm (200 mV/mil) conforming to standard 8 mm 3300XL specification, and full-span linearity tolerance is controlled within ±5% per API 670 standard. Valid linear measuring range spans from 1.27 mm to 9.27 mm, which satisfies regular radial vibration and small-stroke axial clearance measurement requirements for most industrial rotating shafts. Frequency response covers DC up to 10 kHz to accommodate both slow thermal drift variation and high-frequency dynamic vibration signal collection. The minimum recommended target diameter is 15.2 mm for standard carbon steel target material; standard preset installation pre-gap is around 1.27 mm to set the working point near mid linear range.
5. Environmental Working Parameters
Continuous permissible operating temperature of probe sensing head ranges from -35°C up to +120°C for high-temperature installation close to hot bearing housings and turbine casings. Spare storage temperature is maintained between -55°C and +85°C under dry non-condensing storage environment; applicable working relative humidity ranges 5%RH to 100%RH, while long-term continuous immersion in liquid oil or condensed water is prohibited to protect internal insulation integrity. The probe can withstand routine industrial vibration of 10 Hz ~ 2 kHz generated by nearby operating rotating equipment. Persistent exposure to heavy corrosive gas and hot steam environment shall be avoided to extend service life of internal coil and cable insulation. For installation above 1000 meters altitude, shorten regular inspection cycle appropriately.
6. Installation and Routine Maintenance Guidance
Cut off power supply of the whole monitoring loop before installation, screw the probe into reserved threaded hole of bearing housing or customized mounting bracket, adjust pre-installation clearance to rated design gap and lock the fastening nut to prevent loosening during equipment operation. During field cabling, separate probe signal cables from high-current AC power cables to reduce cross electromagnetic coupling interference. In periodic maintenance work, regularly inspect cable outer insulation for cracking, oil corrosion and abrasion, and check mounting thread tightness around probe installation position. If replacement becomes necessary after probe failure, only spare part with identical full part number 22810-00-05-05-02 is allowed for direct swap. All replacement probes complete full performance testing and alternating temperature aging screening before factory shipment to guarantee complete interchangeability during equipment overhaul.
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