Bently Nevada 330708-00-20-50-02-00 Proximity Probe

3300 XL 11mm Probe, Bently Nevada 330708

Product Introduction

The Bently Nevada 330708-00-20-50-02-00 is a high-performance 3300 XL series proximity probe built for non-contact displacement and vibration monitoring. This sensor features a PPS tip and a 304 stainless steel case for excellent durability. Its 5.0-meter total length includes a triaxial FEP-insulated cable. This configuration is specifically designed to pair with the five-meter Proximitor Sensor, ensuring system compatibility.

Technical Specifications

This 3300 XL 11 mm probe provides specific electrical characteristics for its 5.0-meter length. The DC resistance from the center conductor to the outer conductor (RPROBE) is 7.2 ± 0.8 ohms. The cable is a 75 Ω triaxial type with fluoroethylene propylene (FEP) insulation, which offers superior dielectric properties.

The probe tip uses Polyphenylene sulfide (PPS) for resistance to chemicals and wear. Meanwhile, the probe case is constructed from AISI 304 stainless steel (SST), providing robust protection against corrosion. The connector type is the miniature coaxial ClickLoc with FluidLoc cable. This ensures a vibration-proof connection that maintains signal integrity.

Additionally, this model does not require agency approvals, indicated by the "00" option. The overall case length is 2.0 inches, and the unthreaded length is 0 inches. The 330708-00-20-50-02-00 is manufactured in the U.S.A. under strict quality controls. Remember, five-meter probes like this one must be used exclusively with the five-meter Proximitor Sensor for accurate readings.

Mechanical and Environmental Parameters

Understanding the mechanical limits is essential for successful installation. The probe case thread is 5/8-18 UNF, with a maximum thread engagement of 0.938 inches. The recommended installation torque for the case is 15.2 N•m (133 in•lb), while the maximum rated torque is 45.2 N•m (400 in•lb). Over-torquing can damage the probe or the mounting hole.

For the connector, only finger-tight torque is recommended, with an absolute maximum of 0.565 N•m (5 in•lb). The minimum bend radius for the cable is 25.4 mm (1.0 inch). This applies whether the cable has stainless steel armor or not, offering flexibility during routing.

The operating and storage temperature range is from -52°C to +177°C (-62°F to +351°F). However, exposing the Bently Nevada 330708 probe to temperatures below -34°C (30°F) may cause premature failure of the pressure seal. Therefore, avoid low-temperature conditions during storage or operation.

The probe is designed to seal differential pressure between the tip and case using a Viton O-ring. However, it is not pressure tested before shipment. For applications requiring a certified pressure seal test, please contact the custom design department directly.

Installation Guidelines

Correct installation of the 3300 XL 11 mm probe ensures reliable measurements and long service life. First, inspect and clean the mounting hole threads to remove any debris. Then, apply a small amount of anti-seize compound to the probe threads to prevent seizing.

Next, thread the probe into the mounting hole by hand until it is finger-tight. After that, use a torque wrench to tighten it to the recommended torque of 15.2 N•m (133 in•lb). Do not exceed the maximum torque of 45.2 N•m (400 in•lb) to avoid mechanical damage.

Meanwhile, route the probe cable carefully, ensuring the bend radius stays above 25.4 mm. This protects the internal conductors from stress. Finally, connect the ClickLoc connector to the extension cable by hand. Tighten it to a maximum of 0.565 N•m. Always leave a small service loop near the probe head for future adjustments or maintenance.

Packaging List

The package for the Bently Nevada 330708-00-20-50-02-00 includes the following items:

• 1 x 3300 XL 11 mm Proximity Probe (with 5.0m cable and ClickLoc connector)

• 1 x Installation and Operation Manual (digital copy available upon request)

• 1 x Certificate of Origin (printed on request)

Frequently Asked Questions (FAQ)

Q1: What is the total length of the Bently Nevada 330708-00-20-50-02-00 probe?
A1: The total length is 5.0 meters (approximately 16.4 feet), as indicated by the "50" option in the model number.

Q2: Can this 3300 XL probe be used with any Proximitor Sensor?
A2: No. This five-meter probe is specifically designed for use with the five-meter Proximitor Sensor only. Using it with other sensors may cause inaccurate readings.

Q3: What connector type does the Bently Nevada 330708 use?
A3: It uses a miniature coaxial ClickLoc connector with FluidLoc cable, ensuring a secure and reliable connection.

Q4: What is the recommended torque for the probe case?
A4: The recommended installation torque is 15.2 N•m (133 in•lb). The maximum rated torque is 45.2 N•m (400 in•lb).

Q5: What is the DC resistance of this probe?
A5: For the 5.0-meter length, the resistance from the center conductor to the outer conductor is 7.2 ± 0.8 ohms.