Bently Nevada 330909-00-20-10-02-CN 3300 NSv Proximity Probes

Description

Fully threaded 3/8-24 UNF stainless steel probe body (Option 00 unthreaded length) with 2.0 in case (Option 20) and 1.0 m total length (Option 10) — 330909-00-20-10-02-CN. This eddy-current 3300 NSv Proximity Probe measures radial shaft vibration and axial shaft position on high-speed rotating machinery with limited target geometries. The model 330909 configuration features flexible AISI 302 stainless steel armor over the lead cable to prevent physical damage and mechanical wear in severe operating environments.

The probe operates as part of the 3300 XL NSv Proximity Transducer System, pairing with the 3300 XL NSv Proximitor Sensor and a 3300 NSv Extension Cable to establish a linear range of 1.5 mm (60 mils). This specific configuration carries the -CN suffix, indicating the pre-certified China hazardous area approval package. Calibrated to AISI 4140 steel by default, this system is used in centrifugal compressors, pump installations, and aeroderivative gas turbines where space constraints preclude standard-sized transducers.

Features

• Option 00: 0.0 in unthreaded length, providing a fully threaded case for adjustable mounting depth.
• Option 20: 2.0 in overall case length for standard threaded housing installations.
• Option 10: 1.0 meter (39 in) total probe length, simplifying electrical connections outside machine housings.
• Option 02: Miniature coaxial ClickLoc connector with standard 75 ohm FEP insulated cable.
• Suffix -CN: Built-in China hazardous area approval package featuring NEPSI and CCC certifications.
• Integral Armor: Flexible AISI 302 stainless steel armor prevents crushing, abrasive wear, and cable cuts.
• TipLoc Molding: Establishes a chemical-resistant bond between the polyphenylene sulfide probe tip and the stainless steel housing.
• CableLoc Design: Provides 220 N (50 lb) of pull strength to secure the connection between the probe cable and probe tip.

Applications

• Aeroderivative gas turbine radial vibration and thrust position monitoring
• High-speed centrifugal compressors and turbo-expanders with small shafts
• Small-bore pumps, industrial gearboxes, and auxiliary plant machinery
• Non-contact displacement measurement in confined mechanical environments
• Hazardous industrial areas requiring CCC and NEPSI explosion protection certifications

Ordering Information

Technical Specifications

Installation Guidelines

To establish proper installation and performance of the 3300 NSv proximity probe, please observe the following engineering guidelines:

• Target Clearance & Gapping: Use a digital voltmeter to check the output voltage when setting the probe gap. The recommended gap is 1.0 mm (40 mils), which corresponds to approximately -9.0 Vdc.
• Torque Limits: For the 3/8-24 threaded probe case, the recommended installation torque is 11.3 N-m (100 in-lb). Do not exceed the maximum rated torque of 33.9 N-m (300 in-lb). For the first three threads, the maximum limit is 7.5 N-m (66 in-lb).
• Cable Routing: Ensure that the coaxial cable bend radius does not drop below 25.4 mm (1.0 in). Avoid routing cables near high-voltage lines or AC power machinery to prevent electromagnetic interference.
• Connector Protection: Use fluorosilicone connector protectors or self-fusing silicone tape on the probe-to-extension cable connection to exclude water, steam, or turbine lubricants.

Compliance and Certifications

The 3300 NSv proximity probe series complies with international standards when connected to approved Proximitor sensors. This specific product includes the following certifications:

• NEPSI: China National Supervision and Inspection Centre for Explosion Protection and Safety of Instrumentation
• CCC: China Compulsory Certification (hazardous area safety standard compliance)
• ATEX / IECEx / North American approvals: Qualified under multiple-approvals platforms when paired with certified barrier systems (Ui = -28V, Ii = 140mA, Pi = 0.91W)