330878-51-05 50mm DIN Mount Sensor | Bently Nevada

Ordering Option Breakdown

The part number 330878-51-05 specifies a high-performance Bently Nevada 3300 XL 50 mm Proximitor Sensor. Option details include:

• Base Part Number (330878): 3300 XL 50 mm Proximitor Sensor designed for long-range differential expansion and thick-wall position measurements.
• Total Length & Mounting Option (-51): 5.0 meters (16.4 feet) total system length with DIN Rail Mount hardware.
• Agency Approval Option (-05): Multiple hazardous area approvals, including CSA, ATEX, and IECEx certifications.

Technical Specifications

• System Length: 5.0 meters (16.4 feet)
• Mounting Hardware: 35 mm DIN Rail Mount
• Linear Range: 27.9 mm (1100 mils) extended measuring range
• Nominal Scale Factor: -0.394 V/mm (-10 mV/mil)
• Power Input: -17.5 Vdc to -26 Vdc
• Certifications: CSA Class I Div 1/2, ATEX Zone 0/2, IECEx certified

Key Features & Applications

The 3300 XL 50 mm Proximitor Sensor provides maximum measuring range for extreme machinery monitoring applications:

• Extended Range Measurement: Provides 27.9 mm of linear span, ideal for turbine rotor expansion and casing differential expansion.
• DIN Rail Convenience: Snaps directly onto standard 35 mm DIN rails inside field junction boxes for fast installation.
• Explosion-Proof Compliance: Certified with global intrinsic safety approvals (-05 option) for hazardous petrochemical locations.

Installation Guide

1. DIN Rail Installation: Clip the base of the sensor firmly onto a standard 35 mm DIN rail in a clean enclosure.
2. Wiring Terminal Block: Connect power (-24V), Signal, and Common conductors to the screw terminal block.
3. Grounding: Ensure the DIN rail or enclosure chassis is properly tied to industrial earth ground.
4. Signal Check: Measure DC output voltage at terminal pins to confirm zero position prior to running the machine.

Selection Tips

• Choosing DIN Mount vs. Panel Mount: Select option code -51 when retrofitting modern control cabinets with DIN rail infrastructure.
• Hazardous Location Matching: Select option code -05 when global multi-agency certification (CSA, ATEX, IECEx) is mandated for field devices.

Frequently Asked Questions (FAQ)

Q: What is the primary application for a 50 mm Proximitor sensor?
A: The 50 mm series is primarily used for measuring differential expansion on steam turbines and large gas turbines where displacement ranges exceed standard 8 mm or 25 mm probes.

Q: Does 330878-51-05 come with DIN mounting clips pre-installed?
A: Yes, the -51 option includes integral DIN rail mounting clip assemblies ready for installation.