Bently Nevada 330908-00-20-10-02-05 3300 NSv Proximity Probe

Description

330908-00-20-10-02-05 specifies a 3300 NSv proximity probe configured with a 3/8-24 UNF threaded body, 0.0 in of unthreaded length (Option 00), 2.0 in of overall case length (Option 20), and 1.0 m total length (Option 10). It is equipped with a miniature coaxial ClickLoc connector on standard unarmored cable (Option 02) and is certified under multiple agency approvals (Option 05).

This unarmored variant features a standard 75-ohm FEP-insulated coaxial cable, differing from the 330909 armored equivalent. The 3/8-24 UNF thread structure delivers robust mechanical installation compared to 1/4-28 UNF configurations. This transducer component is used for non-contact shaft vibration and axial position measurements on small-bore machinery or high-speed equipment with restricted target areas.

The probe operates as part of the 3300 XL NSv transducer system, pairing directly with a 330980 Proximitor sensor and 330930 extension cable. Together, they maintain calibration for thin target profiles and small shaft diameters where standard 8 mm systems experience signal degradation.

Features

• Option 00 specifies 0.0 in unthreaded length for maximum thread depth in thin-wall machine casings.
• Option 20 provides a 2.0 in overall case length for standard standard-mount installations.
• Option 10 indicates a 1.0 m (39 in) probe total length, requiring a matching extension cable to complete the system length.
• Option 02 supplies a miniature coaxial ClickLoc connector on a standard unarmored 75-ohm cable.
• Option 05 approvals package includes CSA, ATEX, and IECEx certifications for hazardous area installations.
• 3/8-24 UNF-2A thread design without stainless steel armor.
• Polyphenylene sulfide (PPS) tip material compatible with industrial lubricants and fluids.
• AISI 304 stainless steel probe case material resists corrosion in harsh environments.

Applications

• Centrifugal compressors and small-bore rotating machinery.
• High-speed aeroderivative gas turbines.
• Radial vibration and axial position monitoring on shafts smaller than 20 mm (0.8 in).
• Machinery with limited physical access or narrow target geometries.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Ensure the probe tip has adequate clearance from surrounding metal to prevent side-loading calibration errors (recommended counterbore minimum 13 mm / 0.5 in).
• Use hand-tight or up to 0.56 N-m (5 in-lb) maximum torque when connecting the ClickLoc coaxial connectors.
• Apply a minimum bend radius of 25.4 mm (1.0 in) for the coaxial cable to avoid shielding damage.
• Tighten the 3/8-24 UNF probe case to a recommended installation torque of 11.3 N-m (100 in-lb), never exceeding 33.9 N-m (300 in-lb).
• Use connector protectors or silicone self-fusing tape to protect connections from moisture, oil, and contaminants.

Compliance and Certifications

• CE Mark
• RoHS Directive 2011/65/EU
• China RoHS (EFUP 15 years)
• SIL 2 / SIL 3 capable
• ATEX/IECEx: Ex ia IIC T5...T1 Ga, Ex ia IIIC T90 degC...T280 degC Dc (EPL Ga, Dc)
• ATEX/IECEx: Ex nA IIC T5...T1 Gc, Ex ec IIC T5...T1 Gc (EPL Gc)
• CNRTLUs: Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III