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

Product Overview

The 330505-02-02-07 is a Bently Nevada Low Frequency Velocity Sensor designed for precise vibration measurement in industrial rotating machinery. This sensor offers a sensitivity of 20 mV/mm/s (508 mV/in/s) ±10% and a velocity range of 102 mm/s (4 in/s) peak, making it suitable for low-frequency monitoring applications. It comes as a new and original unit in factory packing with a 12-month warranty from Petro Auto Tech.

Technical Specifications Analysis

The 330505-02-02-07 sensor features a frequency response of 0.5—1000 Hz (30—60,000 cpm) ±3.0 dB and 1—200 Hz (60—12,000 cpm) ±0.9 dB, ensuring accurate readings across a broad low-frequency spectrum. Its amplitude linearity is ±3% at 102 mm/s (4 in/s) peak, and the output bias voltage is -12 ±1 VDC. The sensor supports a maximum cable length of 305 metres (1000 feet) without signal degradation when used with the 3500/46M monitor. Environmental limits include an operating and storage temperature range of -40°C to +100°C (-40°F to +212°F) and relative humidity up to 100% non-submerged, with a hermetically sealed case. The weight is less than 375 grams (13.2 oz), and the case material is 300 series stainless steel. The connector is a 2-pin Mil-C-5015 receptacle, also hermetically sealed in 300 series stainless steel. Mounting torque is 46 kg cm (40 in-lb) max, and polarity is defined as Pin A positive with respect to Pin B when velocity is applied from base to top.

Application Scenarios & Usage Methods

This sensor is ideal for monitoring low-frequency vibrations in large turbines, compressors, and pumps in power generation, oil and gas, and heavy industry. For example, install it on bearing housings to detect early signs of imbalance or misalignment. Use the 3/8-24 UNF-2B internal mounting thread and 3/8-16 UNC mounting adapter for secure attachment at a 90° ±5° angle. Connect via the 2-pin Mil-C-5015 receptacle to a Bently Nevada 3500/46M monitor for real-time data acquisition. The sensor's 20 mV/mm/s sensitivity ensures reliable signal output for predictive maintenance programs.

Installation Guide & Packing List

Mount the sensor on a clean, flat surface using the provided 3/8-16 UNC adapter. Apply a maximum mounting torque of 46 kg cm (40 in-lb) to avoid damage. Ensure the cable does not exceed 305 metres (1000 feet) to maintain signal integrity. The package includes the 330505-02-02-07 Low Frequency Velocity Sensor, mounting adapter, and installation instructions. No additional accessories are included.

Purchasing Advice

When selecting the 330505-02-02-07, verify that your monitoring system supports the -12 ±1 VDC output bias voltage and 20 mV/mm/s sensitivity. This sensor is best for low-frequency applications below 1000 Hz. Petro Auto Tech offers new, factory-sealed units with full traceability, ensuring reliable performance for critical machinery protection.

Repair & Maintenance Tips

Routinely inspect the sensor cable and connector for damage. Clean the 300 series stainless steel case with a mild solvent to remove contaminants. Store the sensor in a dry environment within -40°C to +100°C (-40°F to +212°F). Avoid exceeding the shock survivability limit of 981 m/s² (100g) peak. Calibrate annually to maintain ±10% sensitivity accuracy.

Frequently Asked Questions (FAQs)

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

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

Q: What is the maximum cable length for this sensor?

A: The maximum cable length is 305 metres (1000 feet) with no signal degradation when used with a 3500/46M monitor.

Q: What temperature range can this sensor operate in?

A: The operating and storage temperature range is -40°C to +100°C (-40°F to +212°F).

Q: Is the sensor suitable for high-humidity environments?

A: Yes, it can handle up to 100% relative humidity non-submerged, and the case is hermetically sealed.

Q: What mounting thread does the 330505-02-02-07 use?

A: It uses a 3/8-24 UNF-2B internal mounting thread and a 3/8-16 UNC mounting adapter.