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The 330172-00-20-90-01-05 is a high-precision 5mm eddy current proximity probe specifically designed for condition monitoring of large rotating machinery. Belonging to the world-renowned Bently Nevada 3300 transducer series, this model comes standard with a stainless steel armored cable and multiple hazardous area approvals, serving as the critical "electronic eye" that ensures the safe operation of core industrial equipment like steam turbines and compressors.
Patented TipLoc molding technology
API 670 standard compliance
It can perform both static and dynamic measurements simultaneously
When combined with a 3300 XL Proximitor Sensor and XL extension cable, the system provides an output voltage that is directly proportional to the distance between the probe tip and the observed conductive surface. The system can measure both static (position) and dynamic (vibration) data. Its primary use is in vibration and position measurement applications on fluid-film bearing machines, as well as Keyphasor measurement and speed measurement applications. The system provides an accurate, stable signal output over a wide temperature range.
All 3300 XL Proximity Transducer Systems achieve this level of performance with complete interchangeability of probe, extension cable, and Proximitor sensor, eliminating the need for individual component matching or bench calibration. The 3300 5 mm probe improves upon previous designs. A patented TipLoc molding method provides a more robust bond between the probe tip and the probe body. The 3300 5 mm system is orderable with Fluidloc cable options for preventing oil and other liquids from leaking out of the machine through the cable’s interior.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 330172-00-20-90-01-05 Proximity Probe Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Petrochemical & Refining
Monitored mechanical conditions of crack gas compressors, high-speed multistage pumps, and large machinery units in hydrocracking plants to ensure continuous production in flammable environments.
Petrochemical & Fine Chemicals
Placed on high-speed process gas compressors to transfer proximity metrics while the FluidLoc cable stops chemical lubricants from migrating along the wire.
Thermal Power
Employed to monitor bearing shaft vibration, shaft runout, and differential expansion in small-to-medium steam turbines, boiler feed pumps, and draft fans.
Hydroelectric Power
Measures the radial runout of the main shaft and axial displacement of thrust bearings in hydro-generator units, as well as oil film thickness in pump-turbines.
Nuclear Power
Provides fault early warning and vibration monitoring for auxiliary conventional island equipment, such as main feed pumps, cooling circulation pumps, and condensate pumps.
Steel & Metallurgy
Monitors input shaft vibrations in blast furnace blowers, sintering exhaust fans, and hot/cold rolling mill drive gearboxes to prevent blast furnace shutdown.
During the utilization of 330172-00-20-90-01-05, the recommended static gap of 1.27 mm (approximately -9 Vdc to -10 Vdc) must be strictly maintained, and force-threading while the machine is running is prohibited to prevent the probe tip from colliding with the shaft. Meanwhile, avoid over-bending or pulling the stainless steel armored cable during installation, and ensure the ClickLoc connector is securely locked with its protector fitted to eliminate moisture and oil ingress. Lastly, all operations in hazardous environments must be paired with the original Proximitor sensor and fully comply with intrinsically safe regulatory standards.
Its main case is constructed from AISI 304 stainless steel, while the tip is encapsulated in polyphenylene sulfide (PPS) plastic, which offers strong insulation and chemical resistance. The overall case length measures 2.0 inches, and the entire body is fully machined with 1/4-28 UNF fine threads without any unthreaded physical section, allowing field technicians to flexibly fine-tune the mounting depth during assembly. The probe features an integrated 9.0-meter coaxial cable protected by a flexible stainless steel armored conduit and an outer FEP jacket, effectively resisting high temperatures, high-pressure lubricating oil, and physical wear inside enclosed mechanical casings. The cable terminates in a ClickLoc miniature coaxial connector pre-installed with a connector protector (-01 option). Since the probe itself has a total length of 9.0 meters, it must be connected directly to a 9-meter system Proximitor® Sensor without the use of an intermediate extension cable. Furthermore, this model comes with the -05 Multiple Hazardous Area Approvals, ensuring compliance with strict industrial safety standards.
What is the primary function of the 330172-00-20-90-01-05 probe?
It is a non-contact eddy current proximity probe used to measure shaft vibration, position, and speed in critical rotating machinery.
How does the 330172-00-20-90-01-05 probe work?
It uses eddy current technology to emit a high-frequency magnetic field, generating an output voltage proportional to the distance to a conductive steel target.
Why does the 330172-00-20-90-01-05 use an armored cable?
The flexible stainless steel armor protects the internal coaxial cable from physical cuts, abrasion, and aggressive industrial fluids.
What materials are used to construct the 330172-00-20-90-01-05?
The tip is made of high-performance Polyphenylene Sulfide (PPS) plastic, and the body case is made of AISI 304 Stainless Steel.
How should you install and gap the 330172-00-20-90-01-05 probe?
Thread the probe into the mounting bracket, use a voltmeter to monitor the Proximitor gap voltage (typically set to a recommended gap around 1.27 mm), and tighten the locknut to 5.1 N·m.
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