Description

Option 00 (0.0 in unthreaded length), Option 20 (2.0 in case length), and Option 10 (1.0 m total length) define this armored 1/4-28 UNF configuration — 330902-00-20-10-02-05, which operates as a non-contact 3300 NSv proximity probe within critical machinery monitoring loops.

This configuration incorporates a flexible stainless steel armor (Option 02 connector and standard cable with armor) which safeguards the coaxial cable against mechanical wear, abrasion, and debris. Designed for tight clearances and reduced target areas, this probe pairs with a 3300 XL NSv Proximitor Sensor and extension cable to measure radial vibration, axial position, or speed on shafts smaller than 51 mm (2 in) where standard 5 mm or 8 mm systems face spatial constraints.

Features

• Option 00 specifies a fully threaded probe body with 0.0 inches of unthreaded length.
• Option 20 provides a 2.0-inch overall case length with 1/4-28 UNF-2A threads.
• Option 10 establishes a 1.0-meter (39 in) total probe length with integrated FEP-insulated coaxial cable.
• Option 02 designates a miniature male coaxial ClickLoc connector on standard cable with protective stainless steel armor.
• Option 05 delivers Multiple Approvals for hazardous area installations, including ATEX, IECEx, and North American certifications.
• Stainless steel armor provides mechanical protection against physical damage and abrasive environments.
• 5.26 mm (0.207 in) probe tip diameter accommodates limited counterbore and side-view clearances.

Applications

• Shaft vibration and axial position measurements on small-bore centrifugal air compressors, refrigeration compressors, and process gas compressors.
• Radial displacement monitoring in high-speed rotating machinery with tight target geometry or counterbore restrictions.
• Tachometer, zero-speed, and phase reference (Keyphasor) measurements on aeroderivative turbines and fluid-film bearing machinery.

Ordering Information

Technical Specifications

Connections and Interfaces

The probe cable is terminated with a miniature male coaxial ClickLoc connector. This connector locks securely into the female ClickLoc connector of the 3300 NSv extension cable, preventing mechanical loosening and ensuring low electrical resistance.

Installation Guidelines

• Ensure that the probe thread engagement does not exceed 1.5 times the nominal thread diameter to prevent binding during installation.
• Avoid over-tightening the probe case. For 1/4-28 UNF threads, the recommended installation torque is 5.1 N m (45 in lb), with an absolute maximum limit of 7.3 N m (65 in lb).
• Maintain a minimum bend radius of 25.4 mm (1.0 in) along the armored cable to avoid damage to the coaxial core.
• Observe a minimum probe tip clearance (separation) of 25 mm (1.0 in) for axial position or 23 mm (0.9 in) for radial vibration measurements when mounting multiple probes to prevent electromagnetic cross-talk.
• Use appropriate connector protectors to seal the probe-to-extension-cable connection against moisture, oil, and process fluids.

Compliance and Certifications

• ATEX/IECEx: Intrinsically Safe (Ex ia IIC T5...T1 Ga) and Non-Sparking (Ex nA/Ex ec IIC T5...T1 Gc) when connected to a compatible Proximitor Sensor.
• North America (cNRTLus): Class I, Zone 0, AEx/Ex ia IIC T5...T1 Ga; Class I, Division 1, Groups A, B, C, D; Class I, Zone 2, AEx/Ex nA/ec IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, D.
• CE Mark: Compliant with European EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU.
• China RoHS: EFUP designation of 15 years in accordance with SJ/T 11364-2024.
• Functional Safety: SIL 2 (HFT = 0), SIL 3 (HFT = 1) capable.