Bently Nevada 330905-14-19-10-02-05 3300 NSv Proximity Probe

Product Overview

The 330905-14-19-10-02-05 (3300 NSv) is a high-precision eddy-current displacement sensor designed for industrial machinery with extreme space constraints. Specifically engineered for use in centrifugal air compressors, refrigeration units, and high-speed process gas compressors, this probe excels where standard 8 mm sensors face physical limitations. The 330905-14-19-10-02-05 utilizes Narrow Side View (NSv) technology to provide accurate radial vibration and axial position measurements on small-diameter shafts (under 51 mm) or restricted thrust targets. By focusing the electromagnetic field at the tip, it eliminates signal interference caused by counterbore walls or adjacent metallic surfaces. This sensor is a vital component in machinery protection systems, offering the reliability needed to prevent catastrophic failures and optimize asset uptime in aggressive chemical and thermal environments.

Suffix Configuration Breakdown

The ordering suffix for the 330905-14-19-10-02-05 defines a highly specific mechanical and regulatory build:

• 330905: 3300 NSv Proximity Probe, Metric (M10X1 thread).

• 14 (Unthreaded Length): 140 mm unthreaded case length.

• 19 (Overall Case Length): 190 mm total case length.

• 10 (Total Length): 1.0 meter (39 inches) integrated lead cable.

• 02 (Connector/Cable): Equipped with a miniature coaxial ClickLoc connector and standard cable (without armor).

• 05 (Agency Approval): Multiple Approvals (ATEX, IECEx, CSA) for use in intrinsically safe and hazardous area installations.

Technical Specifications

Engineering FAQs

What distinguishes the NSv series from standard 3300 XL probes?

The NSv (Narrow Side View) series uses a smaller coil and a more focused magnetic field. This allows it to monitor vibration on shafts as small as 51 mm (2 in) without the signal distortion that occurs when a standard probe's field "spills" over the side of a narrow shaft.

Can I install this probe without a protective conduit?

Since this specific model (Option 02) is "without armor," the coaxial cable is exposed. While the FEP jacket provides excellent chemical resistance, it is vulnerable to mechanical crushing or cutting. For unprotected runs, we recommend routing the cable through dedicated rigid or flexible conduit.

How does the ClickLoc connector handle high-vibration environments?

The ClickLoc is a patented self-locking connector. Unlike standard threaded SMA or BNC connectors that may loosen over time due to machine resonance, the ClickLoc "clicks" into a fixed mechanical state, ensuring a constant electrical connection and stable impedance.

Field Installation and Maintenance Directives

• Torque and Mounting Safety: For M10X1 probe cases, the recommended installation torque is 7.5 N-m (66 in-lb). Never exceed the absolute maximum of 22.6 N-m (200 in-lb). Over-torquing can lead to case elongation, which shifts the internal coil and permanently alters the sensor's calibration.

• Gap Voltage Calibration: For standard AISI 4140 steel, set the probe gap to achieve a bias voltage of -10 Vdc at the Proximitor Sensor output. This voltage indicates the probe is at the center of its 1.5 mm linear range, allowing for equal measurement of positive and negative vibration peaks.

• Environmental Sealing: The probe is rated for high temperatures, but exposure below -34 deg C (-30 deg F) for extended periods can damage the internal pressure seal. Ensure that the ClickLoc connector is kept clean and dry; if the connection is made in an area with potential fluid ingress, seal it with the provided self-fusing silicone tape.

• System Matching: The 3300 NSv is a specialized system. The 330905 probe must be used with a 3300 NSv extension cable and a 3300 XL NSv Proximitor Sensor. Mixing these components with standard 3300 XL 8mm parts will result in a "Not OK" status or incorrect scale factors.