330191-00-33-10-00 | Bently Nevada 8 mm Proximity Probe

Product Overview

When machine protection demands engineering-grade precision, the Bently Nevada 330191-00-33-10-00 proximity probe delivers verified performance. As part of the 3300 XL series, this 8 mm ETR probe features a 3/8-24 UNF thread and a 1.0 metre total length. Consequently, it suits radial vibration and axial position measurements in critical turbomachinery. The probe operates with -17.5 Vdc to -26 Vdc input, drawing 12 mA maximum. Its 50 Ω output resistance and 7.59 ± 0.50 Ω nominal DC resistance ensure signal integrity. Moreover, the PPS tip and AISI 303/304 stainless steel case provide robust construction.

330191-00-33-10-00 Technical Specifications

• Input Voltage: -17.5 Vdc to -26 Vdc (nonincendive), -23 Vdc to -26 Vdc with barriers
• Output Current: 12 mA maximum consumption
• Isolation: Not specified; refer to official datasheet
• Probe Length: 1.0 metre (3.3 feet)
• Thread: 3/8-24 UNF, maximum engagement 0.563 in
• Case Material: AISI 303 or 304 stainless steel
• Tip Material: Polyphenylene sulfide (PPS)
• Connector: Gold-plated brass or beryllium copper
• Operating Temperature: -55 °C to +232 °C (T1 classification)

Failure Mode Analysis: Why Precision Matters

Proximity probes fail primarily due to mechanical damage, cable pull, or environmental ingress. The 330191-00-33-10-00 addresses these failure modes with patented TipLoc molding, creating a robust bond between tip and body. Additionally, the CableLoc design provides 330 N (75 lbf) pull strength, preventing cable detachment. The Viton O-ring seals differential pressure between tip and case, blocking oil and moisture. However, probes are not pressure tested prior to shipment. Therefore, periodic inspection of the probe tip and cable is essential. By mitigating these common failure points, this probe reduces unplanned downtime and extends service life.

Installation and Compatibility

Install the probe using a 3/8-24 UNF threaded mount, ensuring maximum thread engagement of 0.563 in. The 1.0 metre total length requires no extension cable, simplifying wiring. For nonincendive circuits, follow installation drawing 140979. The probe entity parameters are met when used with Bently Nevada extension cables and connected to Bently Nevada Prox. Consequently, always pair with original Bently Nevada components for verified performance. For precise matching, contact AutoDCSTech with your exact requirements.

Maintenance and Reliability

Inspect the probe periodically for physical damage, cable wear, and connector integrity. The maximum connector torque is 0.565 N·m (5 in·lbf); overtightening may damage threads. Since the probe operates in extreme temperatures, verify ambient conditions against the temperature schedule. The 330191-00-33-10-00 is in stock and ready to ship from AutoDCSTech. Please verify current lifecycle status and availability with AutoDCSTech before ordering.