Bently Nevada 330702-20-30-10-01-05 3300 XL 11 mm Proximity Probe

Description

Option 20 (2.0 in unthreaded length) and Option 30 (3.0 in case length) specify this 3300 XL 11 mm armored probe configuration — 330702-20-30-10-01-05. This non-contact eddy-current displacement probe is used within 3300 XL 11 mm proximity transducer systems for high-resolution shaft vibration and position monitoring. Its design includes standard cable sheathed in flexible AISI 302 stainless steel armor for mechanical protection, a ClickLoc coaxial connector with a pre-installed fluorosilicone connector protector, and multiple hazardous area approvals.

This specific configuration differs from unarmored counterparts (such as 330701) by providing robust armor protection against physical wear, cuts, and environmental debris in industrial rotating machinery. The 1.0 m total length probe is paired with a corresponding 330780 Proximitor sensor and 330730 extension cable to achieve a complete 5.0 m or 9.0 m system length. The 11 mm tip diameter allows for a wider linear range of 4.0 mm (160 mils), making it suitable for applications where larger measurement ranges or larger probe gaps (2.5 mm / 100 mils) are required compared to standard 8 mm probes.

Features

• Thread Type: 1/2-20 UNF threaded case constructed from corrosion-resistant AISI 304 stainless steel.
• Unthreaded Length (Option 20): 2.0 inches unthreaded section for specific mounting geometries.
• Overall Case Length (Option 30): 3.0 inches total case length.
• Total Length (Option 10): 1.0 meter (3.3 feet) integrated coaxial probe lead.
• Armor Protection: Flexible AISI 302 stainless steel armor sheathing with FEP outer jacket to protect against physical abrasion and fluid exposure.
• Connector and Protector (Option 01): Miniature coaxial ClickLoc connector equipped with a pre-installed protective fluorosilicone connector protector.
• Enhanced Range: Large 11 mm tip diameter provides a linear range of 4.0 mm (160 mils).
• Approvals (Option 05): Certified for intrinsically safe and non-incendive installations under multiple global safety standards (CSA, ATEX, IECEx).

Applications

• Radial shaft vibration and axial position measurements in large steam turbines and gas turbines.
• Rotor thrust and structural expansion monitoring in high-power industrial compressors.
• High-vibration rotating machinery protection in oil and gas refineries, chemical process plants, and power generation facilities.
• Industrial environments requiring high mechanical protection (armored sheathing) and sealing against moisture or chemical exposure.

Ordering Information

Technical Specifications

Installation Guidelines

• Thread Torque: Screw the probe body into place using the recommended torque of 15.2 N-m (133 in-lb). Do not exceed the absolute maximum case torque limit of 45.2 N-m (400 in-lb).
• Bend Radius: Route the armored cable carefully, ensuring that the minimum bend radius of 25.4 mm (1.0 in) is never compromised to prevent signal distortion or internal cable damage.
• Grounding and Shielding: Properly isolate the probe shield and coaxial connector. The shield from the coaxial cable is typically connected to instrument ground at the monitor or Proximitor Sensor side.
• Probe Gap: Adjust the nominal probe-to-target gap using a digital voltmeter measuring the Proximitor output. The standard gap of 2.5 mm (100 mils) yields an output of approximately -10.0 Vdc.

Compliance and Certifications

• CSA: Class I, Zone 0, AEx/Ex ia IIC T4/T5 Ga; Class I, Division 1 & 2, Groups A, B, C, D; Class II, Division 1 & 2, Groups E, F, G; Class III
• ATEX/IECEx: II 1 G Ex ia IIC T4/T5 Ga; II 3 G Ex nA IIC T4/T5 Gc; II 3 G Ex ec IIC T4/T5 Gc
• Functional Safety: SIL 2 capable (HFT=0); SIL 3 capable (HFT=1) when used in a redundant multi-transducer loop configuration.
• RoHS: Compliant with European Community Directive 2011/65/EU and China RoHS requirements.