Product Introduction
When proximity probes fail due to tip detachment or cable pullout, machinery downtime escalates. The Bently Nevada 330191-40-75-90-00 3300 XL 8 mm ETR probe solves these issues with patented TipLoc and CableLoc technologies. TipLoc provides a robust bond between probe tip and body, while CableLoc delivers 330 N (75 lbf) pull strength to secure the cable. An optional FluidLoc cable prevents oil leakage from machines. This probe is designed for demanding industrial environments and is available in new, original factory packaging with a 12-month warranty from PLC Source PRO.
Technical Specifications Breakdown
Key specifications for the 330191-40-75-90-00 ensure reliable performance:
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Power Supply: Requires -17.5 Vdc to -26 Vdc (nonincendive circuit) at 12 mA max; with barriers, -23 Vdc to -26 Vdc.
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Output Resistance: 50 Ω.
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Supply Sensitivity: Less than 2 mV change per volt change in input voltage.
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Probe Length: 9.0 meters (29.5 feet) with resistance RPROBE = 9.87 ± 0.50 Ω.
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Probe Case Material: AISI 303 or 304 stainless steel; probe tip in Polyphenylene sulfide (PPS).
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Cable: 75Ω triaxial, FEP insulated (standard) or PFA for extended temperature range.
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Temperature Range: Probe only can operate from -55°C to +232°C (T1 classification).
Industry Applications
The 330191-40-75-90-00 excels in critical rotating machinery such as steam turbines, compressors, and pumps. Its rugged 8 mm design provides thicker encapsulation of the probe coil, making it more resistant to physical abuse. The optional FluidLoc cable prevents oil leaks in gearboxes and bearing housings, reducing maintenance costs. By using these probes, facilities avoid the common failure mode of cable pullout during installation or operation, ensuring continuous vibration monitoring.
Installation & Setup Guidance
Ordering options include unthreaded length (40 = 4.0 in), overall case length (75 = 7.5 in), and total length (90 = 9.0 meters). The probe uses a 3/8-24 UNF thread with maximum engagement length of 0.563 in. Apply connector torque of 0.565 N•m (5 in•lbf) to gold-plated brass or beryllium copper connectors. A Viton O-ring seals differential pressure between tip and case. For nonincendive installations, follow drawing 140979. Note that operation above -23.5 Vdc may reduce linear range.
Selection Guide & Purchasing Advice
When selecting, verify the agency approval option: 00 means not required. The probe weighs 323 g/m (11.4 oz). Ensure compatibility with Bently Nevada extension cables and Proximitor* monitors. For reliable sourcing, choose PLC Source PRO for genuine Bently Nevada 330191-40-75-90-00 probes, new and factory-sealed with warranty.