330850-90-CN 25mm Proximitor Sensor | Bently Nevada

Ordering Option Breakdown

The part number 330850-90-CN represents a fully configured Bently Nevada 3300 XL 25 mm Proximitor Sensor. Below is the precise breakdown of each option code in this part number:

• Base Part Number (330850): 3300 XL 25 mm Proximitor Sensor, designed for high-accuracy non-contact position and vibration measurement on large industrial turbomachinery.
• Total Length & Mounting Option (-90): 9.0 meters (29.5 feet) total system length with a standard Panel Mount configuration.
• Agency Approval Option (-CN): Country-specific safety and regulatory approvals (China Approvals).

Technical Specifications

• System Length: 9.0 meters (29.5 feet)
• Mounting Hardware: Panel Mount
• Linear Range: 12.7 mm (500 mils), starting at 0.63 mm (25 mils) from the target face
• Scale Factor: -0.92 V/mm (-23.3 mV/mil) nominal output
• Supply Voltage: -17.5 Vdc to -26 Vdc (Nominal -24 Vdc)
• Operating Temperature: -51°C to +100°C (-60°F to +212°F)

Key Features & Applications

The 3300 XL 25 mm Proximitor Sensor provides long-range displacement monitoring required for large journal bearing machines and shaft position monitoring. Key benefits include:

• High RF Immunity: Excellent resistance to radio frequency interference, shielding critical measurement signals from electromagnetic noise.
• Extended Range Performance: Specifically tuned for large shaft displacement, axial position measurement, and thrust position monitoring.
• Rugged Enclosure: Designed to withstand extreme industrial environments found in power plants and petrochemical facilities.

Installation Guide

1. Mounting: Secure the sensor base onto a flat metal panel using the provided mounting holes to prevent mechanical stress.
2. Wiring Connections: Connect the probe extension cable to the Proximitor input connector, ensuring clean, dry coaxial connections.
3. Power Supply: Wire the unit to a regulated -24 Vdc power source in accordance with hazardous area field guidelines.
4. Calibration: Verify the target gap voltage using a digital multimeter before locking the probe into position.

Selection Tips

• Matching System Length: Ensure the total extension cable and probe length equal exactly 9.0 meters to maintain accurate linear scale factory calibration.
• Mounting Style Choice: Select panel mount (-90) when installing within standard enclosure backplates. For DIN rail installations, select the -91 option code instead.

Frequently Asked Questions (FAQ)

Q: What cable and probe system is compatible with 330850-90-CN?
A: It is fully compatible with Bently Nevada 3300 XL 25 mm proximity probes and matching 25 mm extension cables designed for 9.0-meter system configurations.

Q: What does the -CN suffix indicate?
A: The -CN suffix specifies country-specific approvals and certifications required for installation within targeted regional regulatory jurisdictions.