Bently Nevada 330105-02-02-10-02-00 8 mm Reverse Mount Proximity Probe

Space-Saving Vibration Sensing for Confined Installations

The Bently Nevada 330105-02-02-10-02-00 features a reverse mount design that simplifies installation in space-constrained machinery compartments. This 8 mm probe utilizes a side-exit cable configuration, allowing operators to route cables away from rotating components more effectively. Its tip diameter measures 8.1 mm, while the case diameter reaches 14.2 mm for stable mounting in standard holders. The overall length extends to 80 mm, with a threaded portion of 21.6 mm and an unthreaded section of 30.5 mm. This configuration weighs approximately 95 grams and accommodates tight clearance applications.

Electrical Performance and Thermal Characteristics

This reverse mount probe operates on a -24 Vdc negative power supply and provides a sensitivity of 7.87 mV/µm across a linear range of 0.25 mm to 2.03 mm. It captures frequency responses from 0 to 10 kHz, effectively measuring both static gap and dynamic displacement signals. The probe tip withstands temperatures from -35°C to +177°C, while the extension cable remains reliable up to +260°C. Such thermal resilience makes this sensor suitable for high-temperature turbine environments. The included 10.0 meter cable features a fluoropolymer jacket that offers exceptional chemical and abrasion resistance.

Detailed Technical Specifications

System Components and Interface Details

This proximity probe system includes the reverse mount probe body, a 10.0 meter extension cable, and two coaxial connectors. The side-exit cable exits at a 90-degree angle from the probe axis, reducing stress on cable connections. An integral connector at the probe end provides a sealed interface that prevents moisture ingress. The system stores negligible internal energy, making it suitable for intrinsically safe installations. Users can pair this probe with the Bently Nevada 3300 XL Proximitor or the 3500 Monitoring System for complete vibration analysis.

Installation Benefits and Maintenance

Installing this reverse mount probe requires a 14 mm wrench and standard mounting brackets for the threaded case. The side-exit cable routing simplifies installation in tight bearing housings and gearbox compartments. Regular inspections of the cable jacket and connector pins will ensure long-term measurement stability. This design proves particularly valuable in retrofit applications where existing probe clearance poses challenges. For accurate readings, calibrate the system using AISI 4140 steel targets to match factory settings. The reverse mount configuration effectively reduces cable bending radius requirements and extends cable service life.