The Bently Nevada 330100-90-00, also cataloged as the 330100 Proximitor Sensor, operates as a dedicated hardware component for eddy-current signal conditioning within 3300 series transducer systems. The unit performs high-frequency oscillation and frequency-to-voltage conversion, transforming the input from a proximity probe into a proportional DC signal required for rotor vibration and position monitoring.

Model Identification Matrix

The 330100-90-00 designation signifies the following configuration:

• Total Length Option: 90 indicates a 9.0 meter (29.5 feet) system length (probe + extension cable).

• Material: A383 aluminum housing.

Hardware Specifications

Mechanical Monitoring and Signal Dynamics

The Proximitor sensor is a critical node in the mechanical monitoring chain, requiring precise eddy-current probe scaling to maintain linear measurement accuracy. During installation and commissioning, technicians must perform gap voltage validation to ensure the output remains at the -10 VDC target when the shaft is centered in the nominal range. To maintain signal fidelity and perform effective cross-talk suppression, sensors should be isolated from high-frequency noise sources. Incorrect routing or shielding of the coaxial signal path introduces EMI, which manifests as instability in the dynamic waveform and errors in shaft centerline data.

Ordering Info

• 330100-90-00 Proximitor Sensor unit

• Technical documentation

• Agency compliance documentation

Field Installation Guidelines

• Mounting: Mount the sensor onto a grounded DIN rail or non-conductive surface to prevent the formation of ground loops.

• Wiring: Terminate the coaxial output using high-quality connectors, ensuring the connection is fully seated to maintain signal impedance.

• Segregation: Maintain physical separation between sensor signal wiring and high-voltage power conduits to reduce environmental electromagnetic noise.

• Inspection: Verify the continuity of the shield and ensure the connector interfaces are free of debris or moisture before activation.

Delivery Information

• Delivery time: 3-5 days when payment finish.

• Dispatched via DHL/FEDEX/UPS.

• Components are sealed in anti-static industrial packaging to prevent damage from electrostatic discharge and mechanical impact during transit.

Frequently Asked Questions

• What material targets are supported? The system is calibrated for AISI 4140 steel. Variations in target material magnetic permeability or conductivity require a site-specific scale factor adjustment to ensure measurement accuracy.

• What is the probe sensitivity? The 3300 series system maintains a standard, linear sensitivity of 7.87 V/mm (200 mV/mil) within the specified operating gap.

• How often should calibration be verified? Calibration verification should be conducted during major machine outages or if the monitoring instrumentation reports an unexplained drift in baseline gap voltage.

• Can the probe operate in hazardous environments? Operation in hazardous locations is permitted only when the entire transducer loop is compliant with the associated site-specific safety certification drawings.

• What extension cables are compatible? Only Bently Nevada 3300 series extension cables are compatible. Using non-specified cabling will cause impedance mismatches, signal reflections, and erroneous measurement data.

• What causes unstable gap voltage? Instability is typically caused by loose connections, damaged coaxial shielding, or excessive mechanical runout on the observed rotating shaft surface.

• How is probe health tested? Health is assessed by measuring the static loop resistance and verifying the dynamic output signal frequency response using a calibrated shaker table.

• What is the expected service life? Service life is dictated by the thermal and mechanical duty cycles of the site. Under stable conditions, the unit is designed for continuous operational support.