330191-00-26-10-00 Bently Nevada 8mm ETR Proximity Probe

What Is the Bently Nevada 330191-00-26-10-00?

The 330191-00-26-10-00 is a Bently Nevada 3300 XL 8 mm ETR proximity probe engineered for precise displacement and vibration measurement in rotating machinery. Specifically, this model features a 3/8-24 UNF thread, no armor, and a 1.0 meter total length. Because the probe uses an 8 mm tip diameter, it provides a thicker encapsulation of the probe coil in molded PPS plastic. Consequently, the larger body delivers a more rugged case than smaller probes. This engineering-grade precision makes the 330191-00-26-10-00 suitable for continuous monitoring in harsh industrial environments.

Key Specifications of the 330191-00-26-10-00

Every parameter below is verified from the manufacturer's data. The table highlights critical electrical and mechanical ratings.

• Input Voltage: Requires -17.5 Vdc to -26 Vdc when installed with a nonincendive circuit; -23 Vdc to -26 Vdc with barriers.
• Output Current: 12 mA maximum consumption.
• Isolation: Not specified; refer to official datasheet.
• Probe DC Resistance: 7.59 ± 0.50 Ω from center conductor to outer conductor.
• Output Resistance: 50 Ω.
• Sensitivity: Less than 2 mV change per volt change in input voltage.
• Total Length: 1.0 meter (3.3 feet).
• Thread: 3/8-24 UNF, maximum thread engagement 0.563 in.
• Case Material: AISI 303 or 304 stainless steel.
• Probe Tip Material: Polyphenylene sulfide (PPS).
• Connector Material: Gold-plated brass or gold-plated beryllium copper.
• Maximum Connector Torque: 0.565 N•m (5 in•lbf).
• Tensile Strength: 330 N (75 lbf) probe case to probe lead; 270 N (60 lbf) at probe lead to extension cable connectors.
• Temperature Range: -55°C to +232°C (T1) for EPL Ga and Gc.

Installation and Setup

Installing the 330191-00-26-10-00 requires attention to mechanical and electrical details. First, verify that the mounting location accommodates the 3/8-24 UNF thread and the 2.6 inch overall case length. Because the unthreaded length is 0.0 inches, the probe seats flush against the mounting surface. Then, connect the probe to a Bently Nevada extension cable and proximitor, ensuring the total system length matches the 1.0 meter probe. During wiring, observe the maximum connector torque of 0.565 N•m to avoid damaging the gold-plated connectors. Finally, confirm that the supply voltage stays within -17.5 Vdc to -26 Vdc for nonincendive circuits. Operation at a more positive voltage than -23.5 Vdc can reduce linear range.

Reliability and Maintenance

The 330191-00-26-10-00 incorporates patented TipLoc and CableLoc designs. The TipLoc molding method creates a robust bond between the probe tip and body, while CableLoc provides 330 N (75 lbf) pull strength. Consequently, the probe resists physical abuse and cable strain. For maintenance, inspect the probe tip and cable periodically for wear or contamination. Additionally, verify the probe DC resistance remains within 7.59 ± 0.50 Ω. Because the probe seals differential pressure with a Viton O-ring, avoid exposing it to incompatible chemicals. Always follow the manufacturer's safety manual for inspection procedures.