330505-03-02-07 | Bently Nevada Low Frequency Velocity Sensor - Petro Auto Tech

Product Overview

The 330505-03-02-07 is a Bently Nevada Low Frequency Velocity Sensor designed for precise vibration monitoring in industrial machinery. This sensor delivers reliable performance for critical asset protection, featuring a robust stainless steel case and hermetically sealed construction. Petro Auto Tech offers this unit as new and original in factory packing with a 12-month warranty.

Technical Specifications Analysis

The 330505-03-02-07 provides a sensitivity of 20 mV/mm/s (508 mV/in/s) ±10%, ensuring accurate velocity measurements. Its frequency response spans 0.5 to 1000 Hz (30 to 60,000 cpm) ±3.0 dB, with a tighter ±0.9 dB from 1 to 200 Hz (60 to 12,000 cpm). The velocity range reaches 102 mm/s (4 in/s) peak, and amplitude linearity holds within ±3% across this range. Output bias voltage is -12 ±1 VDC. Maximum cable length is 305 meters (1000 feet) without signal degradation when used with a 3500/46M monitor. The sensor operates from -40°C to +100°C (-40°F to +212°F) and survives shocks up to 981 m/s² (100g) peak. It withstands 100% relative humidity non-submerged, with a hermetically sealed case made of 300 series stainless steel. Weight is less than 375 grams (13.2 oz). Mounting torque is 46 kg cm (40 in-lb) max. Polarity: Pin A becomes positive relative to Pin B when velocity is applied from base to top.

Application Scenarios & Usage Methods

This sensor excels in low-frequency vibration monitoring for large rotating equipment such as turbines, compressors, and pumps. Use it to detect bearing wear, imbalance, or misalignment in slow-speed machinery operating below 1000 Hz. Install the sensor directly on the machine casing using the 3/8-24 UNF-2B internal mounting thread and the 3/8-16 UNC mounting adapter. Connect it via the 2-pin Mil-C-5015 receptacle to a compatible monitoring system like the 3500/46M for continuous data acquisition. The 180° ±10° transducer mounting angle allows flexible orientation to capture axial or radial vibrations.

Installation Guide & Packing List

Mount the sensor on a clean, flat surface using the provided mounting adapter. Apply the specified maximum torque of 46 kg cm (40 in-lb) to avoid damaging the threads. Ensure the cable length does not exceed 305 meters to maintain signal integrity. The packing list includes one Bently Nevada 330505-03-02-07 Low Frequency Velocity Sensor, a mounting adapter, and the factory-sealed packaging. Verify the connector alignment before tightening to prevent pin damage.

Purchasing Advice

When selecting a velocity sensor, confirm that the sensitivity and frequency range match your application. The 330505-03-02-07 is ideal for low-frequency monitoring up to 1000 Hz with high linearity. Petro Auto Tech provides new original units with full factory warranty, ensuring reliable performance for your critical assets. Check the mounting thread compatibility and cable length requirements before ordering.

Repair & Maintenance Tips

Inspect the sensor cable and connector periodically for damage or corrosion. Clean the stainless steel case with a mild solvent and soft cloth. Store the sensor in a dry environment within the -40°C to +100°C temperature range. Do not submerge the sensor in liquid. Replace the sensor if output bias voltage deviates from -12 ±1 VDC or if sensitivity changes beyond ±10%. Verify mounting torque during reinstallation to maintain proper coupling.

Frequently Asked Questions (FAQs)

Q: What is the sensitivity of the 330505-03-02-07?

A: The sensitivity is 20 mV/mm/s (508 mV/in/s) ±10%.

Q: What is the maximum operating temperature?

A: The sensor operates from -40°C to +100°C (-40°F to +212°F).

Q: Can this sensor be used in humid environments?

A: Yes, it withstands 100% relative humidity non-submerged, and the case is hermetically sealed.

Q: What is the maximum cable length?

A: The maximum cable length is 305 meters (1000 feet) without signal degradation when used with a 3500/46M monitor.

Q: What mounting thread does the sensor use?

A: The internal mounting thread is 3/8-24 UNF-2B, and the mounting adapter option is 3/8-16 UNC.