Product Overview
When machine reliability is critical, the Bently Nevada 330191-02-16-90-00 3300 XL 8 mm ETR Probe offers a significant upgrade over earlier designs. This industrial automation module incorporates patented TipLoc and CableLoc technologies to deliver a more robust bond and stronger cable attachment, reducing the risk of probe failure in high-vibration environments. With a 9.0-meter total length and 3/8-24 UNF thread, the 330191-02-16-90-00 is designed for precise, continuous measurement of shaft relative vibration and position in rotating machinery.
Technical Specifications
The following key parameters define the performance of the 330191-02-16-90-00:
-
Supply Voltage: Requires -17.5 Vdc to -26 Vdc (nonincendive circuit per drawing 140979) at 12 mA maximum consumption; -23 Vdc to -26 Vdc with barriers.
-
Supply Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage.
-
Output Resistance: 50 Ω.
-
Nominal Probe DC Resistance (RPROBE): 9.87 ± 0.50 Ω at 9.0 m length.
-
Probe Tip Material: Polyphenylene sulfide (PPS).
-
Probe Case Material: AISI 303 or 304 stainless steel.
-
Cable: Standard 75Ω triaxial, FEP insulated; available lengths include 0.5, 1, 1.5, 2, 3, 5, or 9 meters. Extended temperature range PFA insulated cable also available.
-
Tensile Strength: 330 N (75 lbf) probe case to probe lead; 270 N (60 lbf) at probe lead to extension cable connectors.
-
Connector Material: Gold-plated brass or gold-plated beryllium copper. Maximum connector torque: 0.565 N·m (5 in·lbf).
-
Probe Case Thread: 3/8-24 UNF, maximum thread engagement 0.563 in.
-
Weight: 323 g/m (11.4 oz).
-
Temperature Classification (Probe Only): For EPL Ga and Gc: T1 -55°C to +232°C, T2 -55°C to +177°C, T3 -55°C to +120°C, T4 -55°C to +80°C, T5 -55°C to +40°C. For EPL Dc: T280°C @ Ta -55°C to +232°C, T225°C @ Ta -55°C to +177°C, T170°C @ Ta -55°C to +120°C, T130°C @ Ta -55°C to +80°C, T105°C @ Ta -55°C to +100°C, T90°C @ Ta -55°C to +40°C.
Industry Applications
The Bently Nevada 330191-02-16-90-00 excels in turbomachinery monitoring, including steam turbines, gas turbines, compressors, and pumps. Its improved TipLoc molding and CableLoc design provide superior resistance to physical abuse, making it ideal for retrofit upgrades where previous probes experienced early failure. The optional FluidLoc cable prevents oil leaks, enhancing safety in lube oil systems. This probe is a direct replacement for older Bently Nevada 8 mm probes, offering enhanced durability without changing system wiring.
Installation & Setup Guidance
When installing the 330191-02-16-90-00, ensure the probe tip is clean and the mounting hole has a 3/8-24 UNF thread. Tighten the probe case to a maximum torque of 0.565 N·m (5 in·lbf) on the connector. The unthreaded length option 02 provides 0.2 in, and overall case length option 16 gives 1.6 in, allowing proper gap setting. Always use the recommended BN extension cables to maintain entity parameters. For one-meter systems, no extension cable is needed.
Maintenance & Reliability
The 330191-02-16-90-00 uses a Viton® O-ring for differential pressure sealing between tip and case. Probes are not pressure tested prior to shipment, so inspect the O-ring during installation. The PPS tip and stainless steel case provide excellent chemical and temperature resistance. Follow the temperature schedule to ensure probe integrity: for example, in T4 environments, ambient temperature must not exceed 80°C. Regular inspection of the cable and connector is recommended, especially in high-vibration areas.
Selection Guide & Purchasing Advice
When ordering the 330191-02-16-90-00, verify the total length of 9.0 meters (29.5 feet) meets your machine train requirements. This probe does not require agency approval (option 00). Consider ordering the optional armor for added mechanical protection. PLC Source PRO stocks new and original units in factory packing with a 12-month warranty. For upgrades or replacements, this model directly interchanges with existing 3300 XL 8 mm probes, minimizing downtime.