330500-05-02 Bently Nevada Velocity Sensor ATEX Certified

Bently Nevada 330500-05-02 Velomitor Piezo-velocity Sensor

High-Performance Vibration Monitoring for Critical Assets

The Bently Nevada 330500-05-02 Velomitor piezo-velocity sensor offers a proven solution for continuous machine vibration monitoring. Specifically, this transducer converts mechanical velocity into a proportional electrical signal. Therefore, it serves as a cornerstone for predictive maintenance programs and machinery protection systems across power generation, oil and gas, and heavy manufacturing sectors.

Electrical Specifications and Measurement Accuracy

First, the 330500-05-02 provides a nominal sensitivity of 3.94 mV/mm/s (100 mV/in/s) with a ±5% tolerance. Additionally, its frequency response covers 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) at ±3.0 dB, while a tighter ±0.9 dB response applies from 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm). Meanwhile, the velocity measurement range extends to 1270 mm/s (50 in/s) peak, accommodating substantial vibration amplitudes. Furthermore, amplitude linearity stays within ±2% up to 152 mm/s (6 in/s) peak, ensuring reliable data fidelity across the operating envelope.

The output bias voltage measures -12 ±3.0 VDC referenced to Pin A, with dynamic output impedance below 2400 Ω. Moreover, the broadband noise floor (4.5 Hz to 5 kHz) is only 0.004 mm/s (160 μin/s) rms, which guarantees excellent signal-to-noise ratio even in low-vibration conditions.

Environmental Durability and Rugged Construction

The Bently Nevada 330500 sensor operates dependably across an extreme temperature range of -55°C to 121°C (-67°F to 250°F). Besides that, it withstands shock survivability up to 5,000 g peak and tolerates 100% relative humidity in non-submerged environments, thanks to its hermetically-sealed design. The case is constructed from 316L stainless steel, providing outstanding corrosion resistance for offshore, chemical, and other harsh settings.

Physically, the sensor weighs just 142 grams (5.0 oz) with a diameter of 25.3 mm and height of 63.2 mm. Its 2-pin Mil-C-5015 connector also features a 316L stainless steel shell for maximum durability. For proper installation, the recommended mounting torque falls between 32-46 kg cm (24-40 in-lb).

Hazardous Area Approvals and Regulatory Compliance

Notably, the 330500-05-02 includes the -02 ATEX (European) agency approval option. Consequently, it carries comprehensive hazardous area certifications:

• Ex ia IIC T4 and AEx ia IIC T4 for Class I, Division 1, Groups A, B, C, D

• Also approved for Class II, Groups E, F, G and Class III locations

• Additionally, Ex nL IIC T4 and AEx nA IIC T4 for Class I, Division 2, Groups A, B, C, D

• Temperature class T4 from -40°C to 100°C ambient

Furthermore, this sensor complies with FCC Part 15, EMC Directive 2014/30/EU, RoHS Directive 2011/65/EU, and DNV maritime classifications for ships, high-speed craft, and offshore installations.

Important Mounting Thread Note

Please note that the -05 mounting thread option is unavailable for the 330500 model. For applications requiring 1/4-18 NPT mounting threads, please order the 330525 sensor variant instead. This distinction ensures proper mechanical compatibility with your mounting hardware.

Installation and Cable Length Guidelines

For optimal signal integrity, the maximum recommended cable length reaches 305 metres (1,000 feet) using Bently Nevada cable part number 02173006 without signal degradation. However, for high-frequency applications involving 50g vibration at 10 kHz with 200 pf/m cable capacitance, the recommended length reduces to 63 metres (208 feet). Additionally, the sensor case is isolated from ground to prevent ground loop issues in monitoring systems.

Packaging and Shipping Information

Your shipment includes the following items:

• One Bently Nevada 330500-05-02 Velomitor piezo-velocity sensor

• Protective packaging for secure transport

• Quick-reference installation card

Moreover, we ship all orders via trusted carriers such as FedEx, UPS, or DHL. Consequently, you can expect prompt and trackable delivery to your facility worldwide.

Frequently Asked Questions (FAQ)

1. What is the difference between the 330500-05-02 and the 330500-04-02?
   The difference lies in the mounting thread option. The -04 uses 1/4-20 UNC threads, while the -05 option is unavailable for this model. For 1/4-18 NPT, order the 330525.

2. Can the 330500-05-02 be used in explosive atmospheres?
   Yes, the -02 agency approval option provides ATEX certification for both Division 1 and Division 2 hazardous areas.

3. What is the operating temperature range for this velocity sensor?
   It operates reliably from -55°C to 121°C (-67°F to 250°F), suitable for extreme thermal environments.

4. How do I determine the correct cable length for my installation?
   Standard installations support up to 305 metres, but for high-frequency, high-g applications, reduce length to 63 metres as specified in the documentation.

5. Is the Bently Nevada 330500 sensor case grounded or isolated?
   The case is isolated from ground, which helps prevent ground loop interference in monitoring systems.