Bently Nevada 330851-04-000-023-10-01-05 3300 XL 25 mm Proximity Probe

Description

Option 04 (Smooth 1.06 in diameter, side exit case), Option 000 (0.0 in unthreaded length), Option 023 (2.3 in overall case length), and Option 01 (stainless steel armor) specify this 3300 XL 25 mm proximity probe configuration — 330851-04-000-023-10-01-05. This configuration includes a 1.0 m (3.3 ft) total length FluidLoc coaxial cable with integrated stainless steel armor and is certified under Option 05 for multi-agency hazardous area approvals.

Unlike standard threaded variants, this side-exit smooth-case design is specifically suited for low-clearance areas where a side cable exit is mechanically necessary. The integrated stainless steel armor protects the coaxial cable from abrasion and physical damage, and the FluidLoc cable construction prevents moisture or oil from wicking along the interior of the cable into the terminal connection or junction box.

Features

• Smooth 1.06 inch diameter case with a side exit cable routing (Option 04)
• 0.0 inch unthreaded length (Option 000) with a 2.3 inch overall case length (Option 023)
• 1.0 meter (3.3 feet) total probe cable length (Option 10)
• Flexible stainless steel (SST) armor (Option 01) to protect the probe lead against abrasion
• Multiple agency approvals (Option 05) for Class I, Zone 0, and Class I, Groups A, B, C, D hazardous areas
• FluidLoc coaxial cable with perfluoroalkoxyethylene (PFA) jacket resists fluid wicking
• 25 mm diameter probe tip with Polyetheretherketone (PEEK) construction
• Rated for continuous operation in temperatures from -35 degC to +200 degC

Applications

Typical applications include:

• Steam turbine differential expansion (DE) monitoring
• Mid-size to large steam turbine generators caused by rotor-to-stator growth rate differentials
• Thrust position and axial displacement monitoring in low-clearance machine housings
• Shaft position and rod-drop style measurements on reciprocating machinery

Ordering Information

Technical Specifications

Installation Guidelines

The following engineering practices are recommended during installation:

• Maintain adequate clearance from surrounding metal to ensure accurate sensor readings and avoid calibration drift or cross-talk.
• Hand-tighten the coaxial connectors, applying a maximum torque of 0.565 N-m (5 in-lb) to prevent damage.
• Apply silicone self-fusing tape or a connector protector around the mated connection to protect from oil, moisture, and debris.
• Avoid sharp bends in the armored cable; do not exceed the minimum bend radius of 25.4 mm (1.0 in).

Compliance and Certifications

This transducer is approved for hazardous areas under option 05, with major certifications including:

• CE Mark: Compliant with European electromagnetic compatibility and electrical directives
• CSA/cNRTLus: Class I, Zone 0, AEx/Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, and D; Class II, Groups E, F, and G; Class III
• ATEX/IECEx: Ex ia IIC T5...T1 Ga for intrinsically safe applications; Ex nA IIC T5...T1 Gc for non-sparking locations