Description
Bently Nevada 330708-00-28-50-02-00
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330708-00-28-50-02-00 |
| Thread Type | 5/8-18 UNF |
| Armor Option | With armor |
| Unthreaded Length | 0.0 inch |
| Overall Case Length | 2.8 inch |
| Total Cable Length | 5.0 meters (16.4 feet) |
| Connector Type | Miniature coaxial ClickLoc connector, standard cable |
| Agency Approval | Not required |
| Probe Tip Diameter | 11 mm |
| Sensitivity | 3.94 V/mm (100 mV/mil) ±10% |
| Linear Range | 4.0 mm (160 mils) |
| Frequency Response | 0 to 8 kHz |
| Temperature Range | -52°C to +177°C (-62°F to +351°F) |
| Weight | 560 g (20 oz) approximate |
Functional Features The armored cable features flexible AISI 302 stainless steel with an FEP outer jacket for protection against abrasion, crushing, and chemical exposure. The 5/8-18 UNF thread is supplied with a 15/16 inch lock nut and 9/16 wrench flats. The probe is compatible with 5.0 meter 3300 XL 11 mm Proximitor Sensors and 4.0 meter extension cables. The armor extends the cable life in environments with mechanical wear risks.
Application Scenarios Steam and gas turbine shaft monitoring, compressor and blower vibration measurement, generator and alternator position monitoring, heavy industrial pump monitoring, petrochemical processing equipment, mechanical vibration monitoring systems in abrasive environments, axial position monitoring on large turbine shafts.
Performance Parameters The 5.0 meter probe system maintains the full 3.94 V/mm sensitivity with linearity within ±0.10 mm over the 4.0 mm standard range. The system is API 670 compliant when used with matching 3300 XL components. The armor adds approximately 380 g to the probe weight compared to non-armored versions. The 5.0 meter cable has a length tolerance of +20%, -0%.
Material Composition Probe tip is polyphenylene sulfide (PPS). Probe case is AISI 304 stainless steel. Cable is 75 Ω triaxial with FEP insulation. Armor is flexible AISI 302 stainless steel with FEP outer jacket. Connector material is gold-plated brass.
Structural Characteristics The probe features a standard forward mount configuration with 5/8-18 UNF-2A thread. The 2.8 inch case length provides substantial thread engagement for secure mounting in thick machine housings. The armored cable has a maximum outside diameter of 7.6 mm (0.30 inch). The probe comes standard with a locknut featuring pre-drilled safety wire holes.
Working Principle The probe operates on the eddy current proximity principle. The Proximitor Sensor supplies a high-frequency RF signal to the probe tip through the triaxial cable. When the probe approaches a conductive target, eddy currents are generated in the target surface. The resulting change in RF field intensity is detected and converted to a DC voltage that is linearly proportional to the gap distance between the probe tip and the target.
