Complete Technical Documentation for Bently Nevada 330104-04-10-05-01-00

Product Overview

The Bently Nevada 330104-04-10-05-01-00 is a specialized 3300 XL series 8mm proximity probe system designed for non-contact displacement, vibration, and position measurement on rotating machinery. This model features a standard side-exit cable configuration with metric M10×1 threads, a very short 4mm unthreaded length, and a unique 0.5 meter integral cable terminated with flying leads (no connector). The “01-00” suffix indicates a specific cable termination and extension cable interface that allows direct hardwiring to a proximitor or junction box without the need for a mating connector.

The probe operates on the eddy current principle. A high-frequency oscillator within the proximitor drives a coil sealed inside the probe tip. As a conductive shaft surface approaches the probe tip, eddy currents are induced in that surface, opposing the magnetic field and changing the coil impedance. The proximitor demodulates this impedance change into a DC voltage that is linearly proportional to the gap distance over the full 2mm measurement range. This model achieves a linearity error of only ±0.2% of full scale and maintains stable performance across an extreme temperature range from -52°C to +177°C.

The defining characteristic of the 330104-04-10-05-01-00 is the very short 0.5 meter cable terminated with stripped and tinned flying leads. This configuration is intended for installations where the proximitor is located very close to the probe, such as inside the same junction box or within 0.5 meters of the probe mounting point. Eliminating the connector removes a potential failure point in high-vibration environments and reduces cost when connectors are unnecessary. The “01” in the suffix indicates the extension cable interface code, and “00” indicates the flying lead termination.

Product Parameters

Product Applications

The 330104-04-10-05-01-00 is designed for installations where the proximitor is mounted in very close proximity to the probe, eliminating the need for long cables or connectors. Below are the primary applications with detailed operational descriptions.

Integral Proximitor-Mounted Junction Box Installations
Many machinery monitoring systems mount the proximitor inside a small junction box attached directly to the machine casing or bearing housing. In this configuration, the distance from probe to proximitor is often less than 0.5 meters. The flying leads of this model are wired directly to the terminal block of the proximitor, eliminating two connectors (probe-to-extension and extension-to-proximitor). This reduces installation cost and removes potential failure points in high-vibration environments.

Retrofit of Older Non-Bently Nevada Proximity Systems
Legacy machines may have non-standard proximity probes with flying lead terminations. When upgrading to 3300 XL technology, this model allows direct wiring into existing junction boxes without modifying the box to accept MS3112 connectors. The 0.5 meter cable is typically sufficient to reach the existing terminal block, and the thin non-armored cable fits through existing conduit entries.

Temporary or Test Installations for Troubleshooting
During machinery diagnostics, engineers often need to temporarily install probes to measure specific vibration or position parameters. The flying lead termination allows rapid connection to portable proximitors or data collectors without searching for mating connectors. The short 0.5 meter cable reduces coiled cable that could snag on rotating parts.

Very High Temperature Environments Near the Proximitor
In some applications, the probe must be located in areas up to 177°C, but the proximitor must be kept below 85°C ambient. When the only available location for the proximitor is within 0.5 meters of the probe, this model provides the shortest possible cable length, minimizing signal loss and RFI pickup. The thin non-armored cable also transfers less heat from the probe area to the proximitor compared to thicker armored cables.

Space-Constrained Installations on Small Machinery
On small compressors, blowers, or pumps with shaft diameters under 50mm, there is often no space for a connector or junction box near the probe port. The flying leads can be routed through a small conduit directly to a remotely located proximitor. The 0.5 meter cable length is sufficient for many small machines where the probe port and electrical entry are on the same side of the machine.

Explosion-Proof Enclosure Wiring
When the probe must enter an explosion-proof enclosure that contains the proximitor, the enclosure’s conduit entries are often too small to pass an MS3112 connector body (approximately 25mm diameter). The flying lead termination allows the cable to pass through a standard 1/2-inch NPT or M20 conduit entry without modification. The field wiring is then made inside the explosion-proof enclosure, maintaining the hazardous area rating.

Educational and Laboratory Test Rigs
University laboratories and training centers often build small rotating machinery test rigs. The flying lead termination allows students to wire the probe to various signal conditioners and data acquisition systems without investing in expensive mating connectors. The short 0.5 meter cable keeps test benches organized and prevents cable damage.

Marine Engine Room Installations with Limited Space
On marine diesel engines, the space around main bearing caps and thrust bearings is extremely tight. A connector body would protrude and risk damage from maintenance activities. The flying leads can be routed flat against the engine block and terminated in a small junction box located in a more accessible area. The 0.5 meter cable is typically sufficient for bearing housings on medium-speed engines (300 to 1000 RPM).

Research and Development Prototype Machines
When building prototype machinery, engineers often change probe locations multiple times during development. Using a probe with flying leads and a short cable allows quick re-routing and re-termination. Once the final probe location is determined, the flying leads can be permanently wired to the monitoring system.

Field Retrofit of 3300 Series Non-XL Probes
Older 3300 series (non-XL) probes often used flying lead terminations. When upgrading to the 3300 XL series for improved linearity and temperature stability, this model provides a direct replacement without changing the field wiring. The 4mm unthreaded length and M10×1 thread match many legacy probe ports.

Product Advantages

Flying Lead Termination (No Connector) eliminates the most common failure point in proximity probe systems – the connector pins and sockets. In high-vibration environments (above 10 g peak), connector fretting corrosion and pin fatigue are leading causes of intermittent signals. Direct wiring with flying leads provides a permanent, gas-tight connection when properly terminated with crimp pins or screw terminals.

Very Short 0.5 Meter Cable Length minimizes signal attenuation, capacitive loading, and RFI pickup. Short cables are particularly advantageous in electrically noisy environments such as near variable frequency drives, welding equipment, or radio transmitters. The shorter cable also reduces the total system capacitance, allowing faster response to rapid gap changes.

Thinner 4.0mm Non-Armored Cable is more flexible than armored versions, allowing installation through tight conduits and around sharp corners. The reduced diameter also allows the cable to pass through smaller compression fittings and cable glands, simplifying installation in explosion-proof enclosures.

Lowest Weight in the 3300 XL Series (0.15 kg) places minimal mechanical stress on the probe mounting bracket. This is critical when the bracket is made of soft materials like aluminum or plastic, or when the probe is mounted on a thin sheet metal housing that could flex under heavier probes.

Metric M10×1 Thread with 4mm Unthreaded Length provides maximum installation flexibility. The short unthreaded length allows the probe to be mounted with the threads starting very close to the probe tip, ideal for thin mounting brackets (2mm to 4mm thickness). The metric thread matches the majority of non-US manufactured machinery.

Reduced Installation Cost because no connectors, mating connectors, or extension cables are required. For large installations with dozens of probes, the cost savings per channel can be significant. The field wiring is completed using standard electrical practices and readily available terminal blocks.

Hermetic Sealing of Probe Tip ensures no moisture or contamination can enter through the probe face. This is critical in applications where the probe is exposed to oil mist, steam, or washdown procedures. The laser-welded tip construction is superior to glued or pressed tips used by lower-quality manufacturers.

True Interchangeability Without Recalibration applies even to this flying lead version. As long as the total cable length (probe cable plus any field wiring) does not exceed the specified limit, any 3300 XL 8mm probe can be replaced with another without recalibrating the proximitor. This allows the use of this short-cable probe in a system originally designed for a longer cable, as long as the field wiring does not add excessive length.

Wide Temperature Operation from -52°C to +177°C allows installation directly on bearing housings and turbine casings without active cooling. The absence of a connector (which has a lower maximum temperature rating than the probe itself) means the entire assembly can be used at the full 177°C rating.

Simple Field Troubleshooting because the flying leads can be easily accessed with multimeter probes. You can measure coil resistance directly at the lead ends without needing a breakout cable or adapter. The white and black wire color coding follows industry standard for coaxial sensors.

Brand Information

The product is manufactured under the Bently Nevada brand. Bently Nevada established the standard for eddy current proximity probes in the 1960s and continues to be the most trusted name in machinery protection. The brand is specified by engineering firms worldwide for critical rotating machinery in power generation, oil and gas, petrochemical, and mining industries.

Product Series

The 330104-04-10-05-01-00 belongs to the 3300 XL 8mm Proximity Probe Series. The “XL” (Extended Linear) designation indicates improved performance over the original 3300 series, including:

• Linear range extended from 1.5mm to 2.0mm

• Temperature stability improved by a factor of 2

• RFI immunity increased from 5 V/m to 10 V/m

• Interchangeability tolerance tightened from ±10% to ±5%

The 3300 XL series includes probes with various thread types (imperial 3/8-24 and metric M10×1), unthreaded lengths (from 0mm to 50mm), cable lengths (0.5m to 9.0m), and terminations (connectors or flying leads). All probes in the series are compatible with any 3300 XL proximitor and any 3300 XL extension cable, subject to total cable length limits.

Key accessories in the series include:

• 3300 XL Extension Cables (models 330130-xxx): Available in lengths from 0.5m to 9.0m with connectors on both ends

• 3300 XL Proximitors (models 330180, 330400): Signal conditioners that provide power and demodulation

• 3300 XL Mounting Brackets (various models): Standard and custom brackets for probe installation

The series is supported by all major condition monitoring systems including 3500 rack systems, Trendmaster online systems, and portable data collectors.

Five Recommended Models from the Same Series

Five Popular Bently Nevada Models (Same Brand)