Specific Application

• Radial vibration and axial thrust position measurement on high-speed fluid-film bearing machinery utilizing protective mounting sleeves.
• Proximity sensing applications where traditional forward-mounting is restricted, requiring the sensor body to install via the rear of a bracket or sleeve assembly.
• Keyphasor phase reference and industrial tachometer speed monitoring inside hazardous environments requiring strict multiple agency approvals.

System Compatibility and Alternatives

• System Compatibility:
  Fully compatible with the Bently Nevada 3300 XL 8mm Proximitor Sensor and standard 3300 XL extension cables. It achieves complete electrical interchangeability with older, non-XL 3300 series 5mm and 8mm transducer systems, providing backward compatibility that aligns with standard industrial API 670 guidelines.
• Alternative Model:
  330105-02-12-10-02-00 (Standard reverse mount variant without hazardous area agency approvals) or 330106-05-30-10-02-05 (Metric M10x1 threaded reverse mount certified equivalent).
• Difference from Alternative Model:
  The 330105-02-12-10-02-05 includes complete CSA, ATEX, and IECEx hazardous area certifications for volatile environments, whereas the baseline -00 option is uncertified and restricted to non-hazardous facility sectors. When evaluated against the 330106 metric alternative, this probe utilizes imperial 3/8-24 UNF reverse-mount housing case lines instead of an M10x1 metric profile, allowing direct matching with North American probe sleeves and mounting bracket threads without adapters.

Ordering Information

Installation & Troubleshooting FAQ

Q1: What is the correct initial gap voltage and mechanical method for setting up this reverse mount probe?
A: Because this is a reverse-mount module, it installs from the rear of the mounting sleeve rather than screwing in from the front. Connect a digital multimeter to your Proximitor sensor output and carefully rotate the probe into its mounting thread position until the meter reads -9.0 VDC for radial tracking, matching the mid-point of its 2.0 mm (80 mils) linear measuring range before tightening the casing hardware.

Q2: Why am I unable to order this reverse mount module with stainless steel armor or a factory connector protector?
A: Due to mechanical clearance restrictions, reverse mount probes are structurally unavailable with factory armor braids or pre-installed connector protectors because those options would prevent the cable assembly from sliding cleanly through the internal diameter of standard matching protective probe sleeves. To protect the ClickLoc junction from environmental oil washdowns, you must manually apply a self-fusing silicone rubber tape kit around the connection during field assembly.

Q3: What happens to system measurement accuracy if I mix this 3300 XL reverse probe with older non-XL components?
A: While each 3300 XL component is fully backward compatible and physically interchangeable with legacy non-XL 3300 series 5mm and 8mm tracking hardware, mixing them changes the circuit properties. Combining components from different series limits your overall loop performance to the looser, baseline specifications of the traditional non-XL 3300 Transducer System, dropping your incremental scale factor (ISF) tolerance profile down from ±5% to a wider margin