Bently Nevada 330195-02-12-05-CN 3300 XL ETR Reverse Mount Proximity Probe

Description

330195-02-12-05-CN: 3300 XL 8 mm Extended Temperature Range (ETR) reverse mount proximity probe configured with a 3/8-24 UNF-2A thread, 0.2 in unthreaded length, 1.2 in case length, 0.5 m total cable length, and NEPSI/CCC hazardous area certifications.

Unlike standard 330105 standard temperature variants rated to 177 degC, the 330195-02-12-05-CN ETR version operates at temperatures up to 218 degC (425 degF), making it suitable for high-temperature steam turbine and gas turbine bearing environments. The reverse mount configuration is threaded from the rear, allowing installation in tight internal cavities where front-access is physically restricted. This specific configuration includes a 0.5-meter total cable length and carries the local -CN NEPSI/CCC approval package required for hazardous industrial sites within China.

Features

• Extended operating temperature rating up to 218 degC (425 degF) for high-temperature machinery environments.
• Reverse mount design allows rear threading and installation into compact internal machine housings.
• 3/8-24 UNF-2A thread pattern fits standard North American mechanical interfaces.
• 0.5 meter (1.6 feet) total cable length pairs with standard 3300 XL extension cables and Proximitor sensors to form a complete 5-meter or 9-meter transducer system.
• Standard unarmored coaxial cable configuration with high-temperature insulation.
• Gold-plated ClickLoc connector provides secure mechanical connection with finger-tight torque.
• China hazardous area certification (NEPSI and CCC) compliant with local regulatory requirements.

Applications

This proximity probe is used in machinery vibration and position monitoring systems across heavy industries. Typical application scenarios include:

• Steam turbine bearing vibration and oil film monitoring.
• Gas turbine rotor axial position and casing expansion measurement.
• High-pressure pump shaft vibration and thrust position tracking.
• Electric motor thrust bearing alignment monitoring.
• Hydroelectric generator shaft runout analysis.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

Follow standard engineering procedures for installation of reverse mount proximity probes:

• Insert the probe from the rear of the mounting location or bracket cavity. Thread carefully to avoid cross-threading.
• Maintain a minimum cable bend radius of 25.4 mm (1.0 in) to prevent internal shield degradation.
• Always match total probe length + extension cable length with the specific calibration requirements of the Proximitor sensor (e.g., exactly 5.0 meters or 9.0 meters).
• Ensure all connector mating surfaces are free of oil and dirt before clicking them closed. Tighten the ClickLoc connectors finger-tight until they click.

Compliance and Certifications

This proximity probe complies with local and international regulatory requirements for industrial machinery safety:

• NEPSI (National Supervision and Inspection Center for Explosion Protection and Safety of Instrumentation) - Certified for hazardous environments in China.
• CCC (China Compulsory Certification) - Certified for explosion safety.
• CSA, ATEX, IECEx - Multi-regional approvals for explosive atmospheres (when used with an approved barrier/system).