Bently Nevada 330703-020-110-10-01-05 3300 XL 11 mm Proximity Probe

Description

330703-020-110-10-01-05 specifies this 3300 XL 11 mm proximity probe configuration, featuring an unarmored metric M14 x 1.5 thread with a 20 mm unthreaded length (Option 020) and a 110 mm overall case length (Option 110). This 1.0-meter probe (Option 10) is supplied with a standard coaxial cable terminated in a ClickLoc miniature coaxial connector with a pre-installed connector protector (Option 01) and carries multiple hazardous area approvals (Option 05).

Used for non-contact eddy-current displacement measurement within 3300 XL 11 mm monitoring chains, this proximity probe detects shaft vibration, axial position, and rotor displacement on critical rotating machinery. Unlike smaller 8 mm systems, the 11 mm sensor tip provides an extended 4.0 mm (160 mil) linear measurement range, which is critical for large turbine casings or application environments where mounting gaps are wider. The pre-installed connector protector prevents environmental contamination and fluid ingress at the extension cable connection, ensuring continuous measurement integrity in the presence of turbine lubricants and moisture.

Features

• Metric M14 x 1.5 threaded housing without protective steel armor.
• 20 mm unthreaded case section with 110 mm total case length for deep metric sleeve mounting.
• 1.0 meter (3.3 feet) total cable length.
• Miniature coaxial ClickLoc connector featuring a pre-installed protective sleeve.
• Standard FEP-insulated 75 ohm triaxial cable.
• Extended 4.0 mm (160 mil) linear measurement range for large rotating machinery.
• Compatible with the Bently Nevada 3300 XL 11 mm Proximitor Sensor (330780) and 330730 extension cables.
• Multiple hazardous area certifications (Option 05) including CSA, ATEX, and IECEx approvals.

Applications

• Axial position and thrust displacement monitoring on industrial steam and gas turbines.
• Radial shaft vibration and casing relative displacement measurements in high-power compressors.
• Rotor position and thermal expansion tracking in critical rotating plant equipment.
• Speed and Keyphasor phase reference measurements on large-diameter machine shafts.

Ordering Information

Technical Specifications

Installation Guidelines

• Gap Adjustment: Adjust the probe gap during installation to 2.5 mm (100 mils), which yields an approximate -10 Vdc output voltage when used with a calibrated Proximitor.
• Torque Limits: Tighten the M14 x 1.5 metric probe case to a recommended torque of 21.1 N-m (187 in-lb). Do not exceed the maximum rated installation torque of 63.3 N-m (560 in-lb) to avoid thread deformation.
• Bend Radius: Route the triaxial FEP cable carefully, keeping the bend radius above 25.4 mm (1.0 in) to protect the internal conductor integrity.
• Connector Protection: Verify that the pre-installed connector protector (Option 01) is fully engaged over the male-to-female connector junction to shield the contacts from process fluids, dust, and turbine lubricants.
• Ground Isolation: Ensure probe and cable shields are kept isolated from structural ground except at the dedicated instrument common ground inside the monitor enclosure.

Compliance and Certifications

• EMC Standards: Complies with European Union EMC Directive 2014/30/EU and is tested to standards EN 61000-6-2 (Industrial Immunity) and EN 61000-6-4 (Industrial Emissions).
• Hazardous Area Certifications (Option 05): CSA, ATEX, and IECEx approvals for use in intrinsically safe and non-incendive environments.
• Intrinsic Safety: Ex ia IIC T5...T1 Ga; Ex ia IIIC T90degC...T280degC Dc (when installed with approved zener barriers or galvanic isolators per Bently Nevada installation drawings).
• Non-Sparking/Non-Incendive: Ex nA IIC T5...T1 Gc; Ex ec IIC T5...T1 Gc (when installed per drawing 140979 in at least an IP54 enclosure).
• Entity Parameters: Ui = -28 V, Ii = 140 mA, Pi = 0.91 W, Ci = 1.5 nF, Li = 610 uH.
• RoHS: Complies with European Community Directive 2011/65/EU (RoHS) and holds a 15-year EFUP designation under China RoHS.
• Functional Safety: SIL 2 certified (Hardware Fault Tolerance HFT = 0), SIL 3 capable (HFT = 1).