Bently Nevada 330850-50-00 3300 XL 25 mm Proximitor Sensor

Product Overview

The Bently Nevada 330850-50-00 is a 3300 XL 25 mm Proximitor Sensor from GE's Bently Nevada machinery protection portfolio. It serves as the signal conditioning interface in a complete eddy-current proximity transducer system, converting impedance variations from a 25 mm proximity probe into a proportional DC voltage output. Configured for 5.0 meters (16.4 ft) system length with panel mounting and no agency approvals, it is the cost-effective choice for standard industrial machinery monitoring in non-hazardous environments.

Key Specifications

• Product Family: 3300 XL 25 mm Proximity Transducer System
• System Length: 5.0 meters (16.4 feet)
• Mounting Option: Panel mount
• Agency Approval: None (00 suffix)
• Probe Input: One noncontacting 3300 XL 25 mm proximity probe + extension cable
• Linear Range: 12.7 mm (500 mils)
• Average Scale Factor: 0.787 V/mm (20 mV/mil) ±5%
• Frequency Response: 0 Hz to 10 kHz (±1 dB)
• Power Supply: -17.5 Vdc to -26 Vdc (without barriers), max 12 mA; -23 Vdc to -26 Vdc (with barriers)
• Supply Sensitivity: < 2 mV output change per 1 V input change
• Output Resistance: 50 Ω
• Target Material: Factory calibrated for AISI 4140 steel (61 mm diameter minimum)
• Housing Material: A380 aluminum alloy
• Operating Temperature: -51°C to +100°C (-60°F to +212°F)
• Storage Temperature: -51°C to +105°C (-60°F to +221°F)
• Weight: 0.22 kg
• Dimensions: 8.0 × 6.0 × 6.5 cm (shipping)

Compatibility & Applications

The 330850-50-00 is fully backward compatible with legacy 7200 series and 3300 RAM transducer systems. It is ideal for steam turbine TSI (Turbine Supervisory Instrumentation), centrifugal compressor vibration monitoring, large motor shaft position tracking, pump bearing condition assessment, and generator differential expansion measurement in power generation, oil & gas, and process industries.

FAQ

• Q: What does the "50-00" suffix mean? A: "50" indicates 5.0 m system length with panel mount. "00" indicates no agency approvals. See the ordering matrix for all suffix combinations.
• Q: Does this include the probe and extension cable? A> The 330850 is a complete proximitor sensor system that includes the probe, extension cable, and signal conditioner as a matched set. Do not mix components from different system lengths.
• Q: Can I use this in hazardous areas? A> The "-00" suffix has no hazardous area certifications. For ATEX/IECEx/CSA hazardous locations, select the "-05" or "-CN" approval variants.
• Q: What happens if I operate above -23.5 Vdc? A> Operation at a more positive voltage than -23.5 Vdc can result in reduced linear range. Always maintain supply voltage within the specified range.
• Q: Is the system RFI/EMI immune? A> Yes, the 3300 XL series features advanced RFI/EMI immunity, maintaining signal integrity near high-frequency equipment and radio sources.

Installation Guide

1. Mount the proximitor on a grounded metallic panel using the supplied hardware.
2. Route the probe and extension cable away from high-voltage conductors and motor power cables.
3. Connect the probe and extension cable to the proximitor input terminals (SpringLoc terminals).
4. Apply -24 Vdc power to the proximitor power terminals.
5. Verify the gap voltage is approximately -10 Vdc when the probe is at the center of the linear range (6.35 mm from target).
6. Connect the output to the Bently Nevada monitor or PLC analog input.
7. Ensure shield grounding at a single point to avoid ground loops.

Selection Tips

• Select 330850-50-00 for standard 5.0 m system length, panel mount, no approvals applications.
• For DIN rail mounting, choose 330850-51-00 (same length, DIN mount).
• For 9.0 m system length, select 330850-90-00 (panel) or 330850-91-00 (DIN).
• For hazardous area certifications (CSA, ATEX, IECEx), select the "-05" suffix variants.
• For China-specific compliance, select the "-CN" suffix variants.
• Always replace the complete system (probe + cable + proximitor) as a matched set to maintain calibration accuracy.