330302-000-011-50-90-00-00 Bently Nevada High Temperature Sensor

Bently Nevada 330302-000-011-50-90-00-00 3300 High Temperature Probe Technical Specifications & Engineering Insights

Configuration Breakdown & Suffix Architecture

Technical Performance Matrix & Physical Characteristics

• Incremental Scale Factor (ISF): 3.94 V/mm (100 mV/mil) ±9.65% across 4.0 mm linear range.
• Deviation from Straight Line (DSL): Less than ±78 µm (±3.1 mils) at ambient reference.
• Extended Thermal Drift: Maintains ISF within ±30% and DSL within ±0.51 mm over -22°C to +350°C probe tip environments.
• DC Resistance: 8.11 Ω loop resistance from center conductor to AISI 316L stainless steel outer conductor (5 m probe configuration).
• Frequency Response: 0 to 6 kHz (+0, -3 dB typical) with up to 305 meters field wiring.
• Target Geometry Requirements: Minimum flat target diameter ≥ 30.5 mm; recommended minimum rotating shaft diameter ≥ 152 mm.
• Materials of Construction: High-purity alumina ceramic probe tip fused to AISI 316L corrosion-resistant stainless steel case.
• Thermal Operating Envelope: -34°C to +350°C (-30°F to +662°F) continuous exposure rating.

Global PLC Spare HUB's Insight

Industrial Application Suitability: The Bently Nevada 330302-000-011-50-90-00-00 high-temperature eddy-current transducer system is engineered specifically for severe-duty turbomachinery environments where standard proximity probes fail due to thermal breakdown. Primary deployment vectors include heavy-duty steam turbines, gas turbine compressor discharge sections, high-pressure boiler feed pumps, expanders, and industrial gearboxes operating at elevated casing temperatures up to +350°C.

Diagnostic Capability & Signal Integrity: Engineered around rigorous proximity metrology standards, this high-temperature sensor delivers high-fidelity vibration and axial position telemetry directly to monitoring racks. Its ceramic-to-metal hermetic assembly prevents moisture ingress and dielectric degradation under cyclic thermal shock. Engineers rely on its stable ISF output to diagnose sub-synchronous vibration, shaft bow, bearing wear, and oil whirl phenomena in high-speed rotating assets before catastrophic mechanical failure occurs.

Commercial Assurance & Fulfillment:

• Warranty Terms: Comprehensive 12-month operational replacement warranty covering manufacturing defects and electrical calibration drift.
• Global Logistics & Express Delivery: Expedited international dispatch via trusted courier partners including FedEx, UPS, and DHL to minimize costly plant downtime.

Engineering FAQ & Selection Guide

Question: How does the 5-meter hardline length on this model impact calibration when integrated with standard 3300 XL monitor systems?

Answer: The system is factory-calibrated as a matched set (probe, extension cable, and proximity detector). The 8.11 Ω probe dc resistance combined with the 5.0-meter hardline and total 9.0-meter system length ensures the electrical phase shift matches the impedance requirements of standard -24 VDC power supply drivers without signal attenuation.

Question: Can this unarmored (00 option) probe be installed in high-vibration routing trays without conduit protection?

Answer: While the AISI 316L stainless steel hardline offers excellent rigidity and corrosion resistance against fluid erosion, unarmored variants (00) lack mechanical crush resistance. Selection guidance: deploy unarmored cables exclusively inside internal machine raceways or rigid protective conduits where external mechanical impact or sharp abrasive rubbing is completely isolated.

Question: What specific failure modes occur if the target shaft diameter drops below the recommended 152 mm limit?

Answer: Operating against a target shaft smaller than 152 mm (6.0 inches) or flat targets under 30.5 mm distorts the electromagnetic eddy-current field dispersion pattern. This geometric constraint leads to scale factor compression, increased non-linearity (DSL degradation), and erroneous vibration amplitude readings due to edge-effect distortion.

Question: Why is a ceramic tip utilized instead of standard polyphenylene sulfide (PPS) plastic in this high-temperature configuration?

Answer: Standard PPS plastic probe tips soften and degrade structurally above +177°C. The high-purity ceramic tip used in the 3300 High Temperature series maintains dimensional stability, dielectric strength, and coil winding rigidity under extreme thermal soak conditions up to +350°C.

Question: What is the recommended field troubleshooting procedure if a sudden DC gap voltage shift occurs during turbine startup?

Answer: First, isolate whether the shift correlates with thermal transient expansion or mechanical rub. Check for hardline pinches, verify terminal strip oxidation in the junction box, and measure loop resistance to confirm if the center conductor has drifted from the nominal 8.11 Ω baseline, which indicates internal hardline micro-fracturing from thermal fatigue.

Model Selection & Technical Comparison

When evaluating alternative configurations for your specific machinery thermal envelope, compare this unit directly with the following compatible variant:

• 330302-000-011-20-90-00-05: Features a shorter 2.0-meter hardline length option (20) and specialized agency/calibration suffix (05), engineered for tighter physical terminal clearances where shorter cable runs reduce excess coiling inside high-temperature junction enclosures.

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