330191-00-16-15-00 Bently Nevada 3300 XL 8 mm ETR Probe 1.5 m

What Is the 330191-00-16-15-00 Proximity Probe?

The 330191-00-16-15-00 is a Bently Nevada 3300 XL 8 mm ETR proximity probe engineered for precise, non-contact displacement measurement in rotating machinery. As part of the 3300 XL series, it benefits from patented TipLoc and CableLoc construction, delivering robust mechanical integrity. This specific model features a 1.5-meter total length, a 3/8-24 UNF thread, and is supplied without armor. It is a new and original part in factory packing, backed by a 12-month factory warranty.

Key Specifications and Performance

Every parameter of the 330191-00-16-15-00 is verified for engineering-grade accuracy. The probe requires a supply voltage of -17.5 Vdc to -26 Vdc when installed with a nonincendive circuit per installation drawing 140979, with a maximum consumption of 12 mA. When used with barriers, the voltage range is -23 Vdc to -26 Vdc. Operation at a more positive voltage than -23.5 Vdc can reduce linear range. Output resistance is 50 Ω, and the nominal probe DC resistance (center to outer conductor) is 7.73 ± 0.50 Ω for the 1.5 m length. The probe tip is molded from polyphenylene sulfide (PPS), while the case is AISI 303 or 304 stainless steel. The standard cable is 75 Ω triaxial, FEP-insulated, and the maximum rated tensile strength is 330 N (75 lbf) from probe case to lead, and 270 N (60 lbf) at the lead-to-extension connectors.

Installation and Compatibility

Because the 330191-00-16-15-00 is a 1.5-meter probe, it is typically used with a Bently Nevada extension cable and a proximitor to form a complete measurement system. The 3/8-24 UNF thread ensures secure mounting, and the maximum thread engagement is 0.563 in. The probe is designed to seal differential pressure between the tip and case using a Viton O-ring; however, probes are not pressure tested prior to shipment. For proper operation, connect only to Bently Nevada extension cables and proximitors. Always verify the specific installation drawing for intrinsic safety and nonincendive circuits.

Applications and Use Cases

This probe is ideal for continuous monitoring of radial vibration, axial position, and eccentricity on steam turbines, compressors, and large motors. Its 8 mm tip provides a thicker encapsulation for enhanced durability against physical abuse. The extended temperature range (ETR) cable option allows operation in ambient temperatures from -55°C to +232°C, depending on the temperature classification. In petrochemical plants, the ETR probe is often chosen for its resistance to high temperatures and its ability to maintain signal integrity in harsh environments.

Maintenance and Reliability

To ensure long-term reliability, periodically inspect the probe tip and cable for mechanical damage or wear. The patented CableLoc design provides 330 N pull strength, minimizing the risk of cable detachment. Avoid excessive bending or pulling on the cable, and verify that the connector torque does not exceed 0.565 N·m (5 in·lbf). For safety-rated installations, follow the manufacturer's safety manual and applicable installation drawings. Regular calibration checks are recommended to maintain measurement accuracy.