Product Overview

The Bently Nevada 330706-05-46-10-02-00 is a high-performance 11mm proximity probe designed for the 3300 XL transducer system. This sensor provides a significantly larger linear range compared to standard 8mm probes, making it the definitive choice for measuring axial thrust position and radial vibration on large-scale rotating equipment. It excels in applications where greater standoff distances or larger measurement spans are required, such as in massive steam turbine-generators and large centrifugal compressors.

Engineered to withstand the rigors of heavy industrial environments, this probe ensures maximum uptime for critical assets. It delivers superior temperature stability and interchangeability, allowing for seamless integration with Bently Nevada 3500 monitoring racks and DCS platforms like Honeywell Experion. By providing high-resolution data in the most demanding conditions, the 330706 probe serves as a cornerstone for predictive maintenance and machinery protection strategies globally.

Transducer Nomenclature Logic

The suffix codes define the specific mechanical and electrical build of this 11mm proximity probe:

330706 [Model Identification]

3300 XL 11mm Proximity Probe with M14 x 1.5 metric thread, non-armored.

-05 [Unthreaded Length]

Specifies a 50mm unthreaded length on the probe case, facilitating specific mounting depth requirements within the machine housing.

-46 [Overall Case Length]

Indicates a 460mm total case length. This extended reach is designed for large-bore machinery where the sensor must pass through significant structural housing to reach the shaft.

-10 [Total Length]

Refers to a 1.0-meter (3.3 feet) total probe length. This must be paired with an 8.0-meter extension cable to complete a standard 9.0-meter system.

-02 [Connector Option]

Equipped with a miniature coaxial Click-Loc connector. This specific option includes a connector protector to prevent fluid contamination and mechanical damage.

-00 [Agency Approval]

Standard configuration with no specific hazardous area approvals, ideal for general-purpose industrial zones or enclosures where secondary protection is provided.

Performance & Dimensional Data

Field Commissioning Protocol

During installation, engineers must verify the "Gap" voltage to ensure the probe operates within its linear region. For the 11mm system, the typical center-gap voltage is approximately -10.0 VDC. Adjust the probe position using a calibrated spindle micrometer or by monitoring the Proximitor output until the target voltage is achieved.

Maintain a minimum target diameter of at least 30.5 mm (1.2 in) to ensure the 11mm probe tip can project its magnetic field without edge-effect interference. Ensure all cable connections are clean and dry; use the Click-Loc mechanism to verify a secure lock. For long-distance runs, utilize dedicated earthed conduits to shield the low-voltage signal from high-frequency electromagnetic noise generated by variable speed drives (VSDs).

System Integration & Resilience

The 330706-05-46-10-02-00 thrives in chemically aggressive and high-pressure environments. Its probe tip, constructed from high-strength Polyphenylene Sulfide (PPS), resists corrosion from synthetic oils and steam. This resilience ensures that the probe maintains a consistent scale factor even during thermal cycling.

The sensor integrates perfectly with the 3500/42M Proximitor/Seismic Monitor, providing the raw data required for Orbit plots and Time-Base waveforms in System 1 software. This level of detail allows for precise diagnosis of shaft rubs, misalignment, and unbalance, facilitating proactive maintenance rather than reactive repairs.

Shipping & Global Fulfillment

We ensure your critical spares arrive in perfect condition through optimized logistics:

Lead Time: 3-5 days when payment finish for in-stock units.

Global Dispatch: Reliable delivery via DHL Express, FEDEX International, or UPS.

Secure Packaging: Every probe undergoes inspection before being placed in anti-static industrial packaging. We use multi-layer reinforced boxing and shock-absorbent materials to protect the delicate ceramic/PPS probe tip during international transit.

Technical Diagnostics FAQ

Q1: Why does the 11mm probe have a different scale factor than the 8mm probe?

A1: The 11mm probe is designed for a larger linear range (160 mils vs 80 mils). To accommodate this wider measurement window, the sensitivity is set to 100 mV/mil (3.94 V/mm), which is half the sensitivity of the standard 8mm system.

Q2: Can I use this 1.0m probe with a 4.0m extension cable?

A2: Only if the Proximitor is specifically calibrated for a 5.0-meter system. Most 11mm systems are calibrated for 9.0 meters, requiring an 8.0-meter extension cable to be paired with this 1.0-meter probe.

Q3: How do I identify a faulty connector in the field?

A3: Check for a "low-side" voltage or an "Invalid" status on the 3500 rack. A damaged Click-Loc connector often results in an open circuit, causing the Proximitor output to swing to its limit (usually -24V). Inspect the gold plating on the pins for signs of pitting or moisture.