Bently Nevada 330500-06-04 Velomitor Piezo-velocity Sensor

330500-06-04 Bently Nevada Velomitor Piezo-velocity Sensor

Product Introduction

The Bently Nevada 330500-06-04 is a high-performance Velomitor piezo-velocity sensor designed for reliable vibration monitoring. This model features a 5/8 – 18 UNF mounting thread and carries multiple agency approvals including CSA and ATEX. Manufactured in the U.S.A., this sensor provides accurate velocity measurements across a broad frequency range. Its hermetically-sealed 316L stainless steel construction ensures durability in demanding environments. Furthermore, this sensor is ideal for predictive maintenance and machine protection applications.

Technical Specifications

The Bently Nevada 330500 sensor offers impressive electrical performance. Its sensitivity is 3.94 mV/mm/s (100 mV/in/s) with a tolerance of ±5%. The frequency response spans from 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) at ±3.0 dB, while a narrower band of 6.0 Hz to 2.5 kHz provides ±0.9 dB accuracy. Additionally, the velocity range reaches 1270 mm/s (50 in/s) peak, accommodating high-speed machinery.

The 330500-06-04 also exhibits excellent linearity, with amplitude linearity at ±2% up to 152 mm/s (6 in/s) peak. Its transverse sensitivity measures less than 5%, ensuring minimal cross-axis interference. The mounted resonant frequency exceeds 12 kHz, providing a wide usable bandwidth. The output bias voltage is -12 ±3.0 VDC referenced to Pin A, and the dynamic output impedance stays below 2400 Ω. Furthermore, the broadband noise floor (4.5 Hz to 5 kHz) is only 0.004 mm/s (160 μin/s) rms, which ensures clean signals.

Environmental and Mechanical Ratings

This Bently Nevada 330500-06-04 operates reliably in extreme conditions. The operating temperature range extends from -55°C to 121°C (-67°F to 250°F) , covering most industrial applications. It withstands shocks up to 5,000 g peak and handles relative humidity up to 100% non-submerged, thanks to its hermetically-sealed case. The case is fully isolated, and the base strain sensitivity is rated at 0.005 in/s/mstrain. Moreover, magnetic field susceptibility is less than 51 min/s/gauss at 50 gauss, 50-60Hz.

The physical construction uses 316L stainless steel for both the case and the 2-pin Mil-C-5015 hermetically-sealed connector. The sensor weighs only 142 grams (5.0 oz) and measures 25.3 mm (0.995 in) in diameter and 63.2 mm (2.49 in) in height. The maximum recommended cable length is 305 metres (1,000 feet) with cable part number 02173006, without signal degradation.

Hazardous Area Approvals and Compliance

The 330500-06-04 carries comprehensive hazardous area certifications. It is approved as Ex ia IIC T4 and AEx ia IIC T4 for Class I, Division 1, Groups A, B, C, and D. Additionally, it covers Class II, Groups E, F, G, and Class III. For Division 2 applications, it offers Ex nL IIC T4 and AEx nA IIC T4 for Class I, Div 2, Groups A, B, C, D. The T4 temperature class applies from -40°C to 100°C ambient. Installation must follow drawing 167537.

This sensor also complies with FCC Part 15, EMC Directive 2014/30/EU, and RoHS Directive 2011/65/EU. Furthermore, it meets DNV rules for classification for ships, high-speed craft, and offshore standards.

Installation Guidelines

Installing the 330500-06-04 requires attention to mounting torque and polarity. The recommended mounting torque ranges from 32-46 kg cm (24-40 in-lb) maximum. When the sensor case moves toward the connector, Pin A becomes positive with respect to Pin B. For optimal performance, use a cable length of up to 208 feet (63 metres) assuming a maximum vibration of 50g at 10 kHz and cable capacitance of 200 pf/m.

Packaging List

The product package for the Bently Nevada 330500-06-04 includes the following items:

• Velomitor piezo-velocity sensor unit

• 2-pin Mil-C-5015 connector (attached)

• Mounting thread adapter (5/8 – 18 UNF)

• Installation and setup guide

• Calibration data sheet

• Protective storage case

Frequently Asked Questions

1. What is the primary application for the Bently Nevada 330500-06-04?

This sensor measures absolute velocity on rotating machinery such as turbines, compressors, pumps, and fans. It provides reliable data for condition monitoring and predictive maintenance.

2. Can this 330500 sensor be used in explosive environments?

Yes, the 330500-06-04 carries CSA and ATEX approvals for Class I, Division 1 and 2 hazardous areas. It is certified as Ex ia IIC T4 and Ex nL IIC T4.

3. What is the maximum cable length for this Velomitor sensor?

The Bently Nevada 330500 supports up to 305 metres (1,000 feet) of cable without signal degradation. The recommended length for high-frequency applications is 208 feet (63 metres).

4. How do I verify the correct polarity during installation?

When the sensor case moves toward the connector, Pin A becomes positive relative to Pin B. Always confirm polarity using a multimeter before finalizing connections.

5. What shipping carriers do you use for this product?

We ship the Bently Nevada 330500-06-04 using FedEx, UPS, or DHL for fast and reliable delivery worldwide.