Bently Nevada 330851-04-000-030-10-01-00 3300 XL 25 mm Proximity Probe

Description

Option 04 (smooth 1.06 in diameter, side exit) and Option 01 (with stainless steel armor) specify this 3300 XL 25 mm proximity probe configuration — 330851-04-000-030-10-01-00. This eddy-current probe is equipped with a 1.0 m (3.3 ft) integrated cable encased in flexible AISI 302 stainless steel armor with a PFA outer jacket (Option 01). Designed without threaded mounting, the 1.06-inch smooth cylindrical case is ideal for clamp-style mounting configurations, while the side-exit cable arrangement resolves clearance constraints in narrow machine enclosures where axial rear-exit cables cannot be routed without exceeding the minimum bend radius.

This configuration features a 3.0-inch overall case length (Option 030) and contains no unthreaded length (Option 000) as typical for smooth-case probes. It is manufactured without agency approvals (Option 00), making it suitable for general industrial environments or areas that do not require hazardous area certifications. The 330851-04-000-030-10-01-00 proximity probe operates within a 3300 XL 25 mm transducer system, combining with a 330854 extension cable and a 330850 Proximitor sensor to measure axial shaft position, differential expansion, or rod-drop in reciprocating compressors and steam turbines.

Features

• Probe Case Type Option 04: Smooth 1.06-inch (27.05 mm) diameter cylindrical body with side-exit cable configuration.
• Unthreaded Length Option 000: 0.0 inches unthreaded length (smooth case body).
• Overall Case Length Option 030: 3.0 inches total case length.
• Total Length Option 10: 1.0-meter (3.3 feet) integrated triaxial FluidLoc cable.
• Armor Option 01: Flexible AISI 302 stainless steel armor with a protective perfluoroalkoxyethylene (PFA) outer jacket.
• Agency Approval Option 00: Standard configuration with no hazardous area certifications.
• Non-contact Measurement: Measures large-target displacement over a 12.7 mm (500 mil) linear range.
• Target Calibration: Calibrated to standard AISI 4140 steel target materials.

Applications

• Steam turbine differential expansion (DE) monitoring
• Steam turbine thrust position and axial displacement measurements
• Large shaft target vibration and position tracking
• Rod-drop monitoring in reciprocating compressors
• Heavy industrial rotating machinery protection in non-hazardous environments

Ordering Information

Technical Specifications

Installation Guidelines

Because smooth case probes lack mounting threads, they must be secured in place using a standard transducer clamp (such as Bently Nevada part 29660-01) surrounding the smooth 1.06 in casing. The side-exit cable requires a minimum of 25.4 mm (1.0 in) bend radius during routing to prevent strain on the internal triaxial conductors. Ensure that the combined length of the probe cable (1.0 m) and the extension cable equals the total system length expected by the Proximitor sensor (typically 5.0 m or 9.0 m). Connector-to-connector torque must be finger tight, and can be tightened to a maximum of 0.565 N-m (5 in-lb) using proper tools. Use silicone self-fusing tape or connector protectors (such as 40180-02) for environments where moisture or contaminants are present.

Compliance and Certifications

This standard configuration complies with the European CE mark requirements. It is supplied under the Option 00 approval selection (No Approvals), making it suitable for non-hazardous industrial areas or general-purpose applications.