Description

The Bently Nevada 330101-00-20-0-5-02-05 is a high-precision, non-contact 8 mm proximity probe belonging to the industry-standard 3300 XL Proximity Transducer System. This specific variant is configured without mechanical armor and has standard 3/8-24 UNF threads. Designed to meet strict engineering dimensions, it provides a 2.0-inch fully threaded case (0.0 inches of unthreaded length) and a compact 0.5-meter (1.6-foot) total cable length terminated with a standard miniature coaxial ClickLoc connector. To ensure suitability for severe industrial zones, it comes equipped with option 05 agency approvals, providing complete ATEX, IECEx, and CSA certifications for hazardous installations.

Utilizing eddy-current operational principles, this probe senses the physical distance between the probe tip and a target conductive surface such as a rotating machine shaft. It operates within a machinery protection chain when integrated with a 3300 XL Proximitor sensor and a corresponding extension cable. It is permanently installed on bearings and gearboxes to deliver real-time radial vibration data, shaft axial location, and keyphase referencing, protecting large steam turbines, centrifugal compressors, and power generation pumps from catastrophic damage.

Features

• Non-contact eddy-current sensing avoids mechanical contact, eliminating component wear and sensor drift.
• Unarmored physical layout provides superior routing flexibility through tight machine channels and industrial conduit.
• Threaded 3/8-24 UNF stainless steel body delivers high mechanical durability and environmental corrosion resistance.
• Short 0.5-meter cable is optimized for system setups where the extension cable junction box is situated near the machine shell.
• Miniature coaxial ClickLoc connector supplies secure electrical connection and prevents high-frequency signal loss.
• Classified under agency approval code 05, making it certified for intrinsically safe applications in hazardous areas globally.

Applications

The Bently Nevada 330101-00-20-0-5-02-05 probe is engineered to operate in harsh industrial machinery setups. Primary application fields include:

• Dynamic shaft radial vibration monitoring in high-velocity steam and gas turbines.
• Thrust position and axial displacement tracking on industrial centrifugal compressors.
• Casing vibration and thermal growth measurement in critical water treatment and feed pumps.
• Continuous machinery condition monitoring in hazardous environments such as petroleum refineries, chemical processing plants, and offshore platforms.

Ordering Information

The ordering structure of the 3300 XL 8 mm proximity probe specifies exact mechanical mounting threads, length options, and safety classifications. The segment breakdown for this specific SKU is decoded below:

Technical Specifications

Installation Guidelines

For correct system calibration and trouble-free signal transmission, follow these engineering recommendations:

• Ensure proper probe gap settings during installation. System calibration typically requires the output voltage to sit around -10 VDC at the midpoint of the linear displacement range.
• Isolate the coaxial cable from adjacent power lines and high-temperature machinery surfaces to minimize electromagnetic interference (EMI) and thermal wear.
• Ensure the minimum bend radius of the probe cable is maintained at 25.4 mm (1.0 in) to protect the internal conductor from damage.
• Verify ClickLoc connectors are completely clean and dry before mating. If connector bodies require isolation from surrounding metal casing components, install connector protectors.
• Ground the cable shielding exclusively at the monitoring rack end. Floating the shield at the sensor head prevents unwanted ground loops.

Compliance and Certifications

This 3300 XL 8 mm proximity probe configuration is certified to safety standards for explosive and hazardous areas:

• CSA: Intrinsically Safe / Non-Incendive for Class I, Division 1 and 2, Groups A, B, C, and D; Class II, Groups E, F, G; Class III
• ATEX: II 1 G Ex ia IIC T5...T1 Ga; II 3 G Ex ec IIC T5...T1 Gc
• IECEx: Ex ia IIC T5...T1 Ga; Ex ec IIC T5...T1 Gc
• RoHS: Compliant with environmental directives restricting hazardous substances.