330303-006-50-90-00-00 Bently Nevada High Temperature Probe | 3300 XL

Product Overview

Global PLC Spare HUB's Insight: Engineered for extreme thermal operating environments, the Bently Nevada 330303-006-50-90-00-00 represents a specialized high-temperature proximity probe from the trusted 3300 XL Series. Utilizing a smooth case architecture with a robust ceramic probe tip and AISI 316L stainless steel housing, this transducer withstands continuous process heat up to +350°C. Designed and manufactured in the U.S.A., it delivers exceptional signal fidelity for critical monitoring applications where standard probes experience thermal degradation.

Configuration Breakdown & Part Number Matrix

Advanced Technical Specifications

• Incremental Scale Factor (ISF): 3.94 V/mm (100 mV/mil) ±9.65% including interchangeability error over a 4.0 mm linear range.
• Linear Range: 4.0 mm (160 mil) operating span starting from approximately 0.6 mm target distance.
• Deviation from Best Fit Straight Line (DSL): Less than ±78 µm (±3.1 mils) at ambient conditions.
• Thermal Drift Performance: ISF remains within ±30% and DSL remains within ±0.51 mm (±20 mils) across a probe temperature range of +22°C to +350°C.
• Frequency Response: 0 to 6 kHz (+0, -3 dB typical) with up to 305 meters of field wiring.
• DC Resistance (R_PROBE): 8.11 ohms from center conductor to outer conductor for the 5.0-meter configuration.
• Target and Shaft Criteria: Requires a minimum flat target diameter of 30.5 mm (1.2 in) and a minimum shaft diameter of 152 mm (6.0 in).
• Operating Temperature: -34°C to +350°C (-30°F to +662°F).

Target Equipment & Industrial Applications

• Deployed on extreme-duty steam turbines, gas turbine exhaust ends, and high-temperature heavy-duty industrial compressors.
• Utilized in petroleum refining fluid catalytic cracking units and boiler feed water pump assemblies.
• Perfect for heavy manufacturing environments experiencing severe radiant and ambient thermal loads where standard polymer-tipped probes fail.

Machinery Diagnostic Capabilities

• Tracks high-frequency radial vibration transients and axial shaft displacement under intense thermal expansion conditions.
• Identifies early-stage rotor imbalance, thermal bow phenomena, and journal bearing wipe before catastrophic mechanical failure.
• Provides stable voltage bias outputs to machinery protection systems despite severe temperature gradients across the machine casing.

Fulfillment, Warranty & Shipping Terms

• Warranty Protection: Comprehensive 12-month replacement or repair warranty covering all manufacturing defects.
• Dispatch Timeline: Rapid order processing with dispatch within 24 to 48 hours.
• Global Shipping Partners: Secure, tracked international delivery utilizing FedEx, UPS, and DHL.

Comparative Model Analysis & Selection Guidance

Comparison Model: 330303-006-20-90-01-00

Engineering Recommendation: While both models share the 0.6-inch overall case length and total 9.0-meter system length, the 330303-006-20-90-01-00 features a shorter 2.0-meter hardline cable option paired with protective stainless steel armor (01 code). Choose the 330303-006-50-90-00-00 when your routing path demands a longer 5.0-meter hardline span through extreme heat zones, and opt for armored variants if mechanical abrasion or chemical splash risks outweigh direct thermal exposure lengths.

Frequently Asked Questions

Why does the 330303-006-50-90-00-00 utilize a ceramic tip instead of standard polyphenylene sulfide?
Ceramic materials possess superior thermal stability and structural rigidity at extreme temperatures up to +350°C, preventing tip distortion or calibration drift that would destroy standard plastic probe tips in high-heat environments.

How does the 5.0-meter hardline cable length affect signal integrity during operation?
The specialized hardline cable construction maintains stable electrical impedance and low capacitance across long thermal transition zones, preserving the flat frequency response up to 6 kHz without signal attenuation.

What precautions are necessary when routing the unarmored hardline cable?
Because the hardline option lacks outer stainless steel armor, technicians must secure the cable using high-temperature clamps to prevent mechanical fatigue, sharp bending radii, and vibration rubbing against adjacent machine structures.

How can field engineers verify proper probe performance during hot commissioning?
Engineers should measure the DC voltage gap directly at the monitor rack terminals using a high-impedance digital multimeter to confirm that the static gap voltage settles near the recommended -9 Vdc operating center.

What factors dictate choosing a 5.0-meter hardline over a 2.0-meter hardline variant?
Selection depends entirely on the distance from the high-temperature machine penetration point to a safe, cooler junction box location where the transition to standard extension cables can safely take place.

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