Configured for high-frequency signal conditioning in 3300 NSv Machinery Protection Systems, the Bently Nevada 330980-50-05 (330980 Proximitor Sensor) provides direct physical/electrical execution. This module processes the high-frequency oscillation from an eddy-current probe, converting the proximity of a metallic target into a proportional analog voltage signal. The sensor maintains system impedance characteristics to ensure the integrity of vibration and position data across the total 5.0 meter system length, facilitating high-resolution diagnostics for small-diameter shafts.

Model Suffix Breakdown

• 330980: 3300 NSv Proximitor Sensor

• -50: Total system length (5.0 meters / 16.4 feet)

• -05: Agency approval option (Multiple international certifications)

Hardware Specifications

Eddy-Current Probe Scaling & Signal Integrity

The 3300 NSv system relies on precise eddy-current probe scaling to convert target proximity into accurate displacement data. During system commissioning, gap voltage validation is performed to ensure the transducer operates within the -10 VDC target range at the sensor's mid-gap position. This centering allows for optimal linear response and prevents signal saturation during high-amplitude shaft motion. To achieve valid rotor dynamics, cross-talk suppression is required by ensuring that the Proximitor signal output is isolated from electromagnetic interference, thereby maintaining the signal-to-noise ratio necessary for machine monitoring.

## Ordering info

• One (1) 330980-50-05 Proximitor Sensor

• Mounting hardware (for DIN-rail or bulkhead mounting)

• Installation and configuration instruction manual

• Multi-approval compliance documentation

Field Installation Guidelines

• Mounting: Install the Proximitor in a weather-proof enclosure to protect it from harsh environments and temperature extremes.

• Grounding: Ensure the Proximitor base is connected to a clean signal ground to prevent ground loops that introduce electrical noise.

• Wiring: Maintain a clear distance from high-voltage cables to avoid induced interference in the high-frequency oscillation loop.

• Connection: Secure all coaxial connections until the Click-Loc connector is fully engaged, and apply the protective sleeve to prevent moisture ingress.

Delivery Information

• Delivery time: 2-7 days when payment finish.

• Dispatched via DHL/FEDEX/UPS.

• Anti-static industrial packaging used to ensure component protection during transit.

Frequently Asked Questions

• Can I use this sensor with standard 3300 XL probes?

  No. The 330980 NSv sensor is designed for the NSv probe architecture and operates at a different carrier frequency than the 3300 XL standard components.

• What is the effect of changing the cable length?

  Altering the 5.0 meter cable length changes the impedance of the tuned oscillation circuit, which invalidates the factory calibration and results in inaccurate output.

• How can I test the Proximitor functionality?

  Use a probe driver tester to simulate a target at known gaps and verify that the output voltage corresponds to the expected calibration slope.

• Is the Proximitor field-repairable?

  No. The module is encapsulated to protect internal electronics; any attempt to open the case will permanently damage the component and invalidate approvals.

• How does it handle power supply fluctuations?

  The Proximitor is designed to operate within a specific DC supply range; input voltages outside this range will cause signal degradation or sensor failure.

• What does the "NOT OK" signal indicate?

  A "NOT OK" output indicates that the Proximitor has detected an open or short circuit in the probe/cable loop, rendering the current data invalid.

• Is the sensor sensitive to surrounding metallic objects?

  Yes. Mounting the probe too close to metal surfaces other than the target will cause false gap readings; observe the minimum clearance requirements in the manual.

• Why is the output resistance 50 Ohm?

  This impedance is standard for matching the transmission characteristics of the coaxial cable, ensuring minimal signal reflection and accurate data delivery to the monitor.