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

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

Reliable Vibration Monitoring for Critical Machinery

The Bently Nevada 330500-06-CN Velomitor piezo-velocity sensor provides a trusted solution for continuous machine vibration monitoring. Specifically, this transducer converts mechanical velocity into a proportional electrical signal. Therefore, it forms an essential component of predictive maintenance programs and machinery protection systems across power generation, oil and gas, and heavy manufacturing sectors.

Electrical Performance and Measurement Precision

First, the 330500-06-CN offers a nominal sensitivity of 3.94 mV/mm/s (100 mV/in/s) with a ±5% tolerance. Additionally, its frequency response spans 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) at ±3.0 dB, while a tighter ±0.9 dB response is available from 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm). Meanwhile, the velocity measurement range reaches 1270 mm/s (50 in/s) peak, accommodating substantial vibration amplitudes. Furthermore, amplitude linearity remains within ±2% up to 152 mm/s (6 in/s) peak, ensuring accurate readings across the operating envelope.

The output bias voltage is -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 clarity even in low-vibration scenarios.

Environmental Durability and Mechanical Construction

The Bently Nevada 330500 sensor operates reliably 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 conditions, thanks to its hermetically-sealed design. The case is constructed from 316L stainless steel, offering outstanding corrosion resistance for offshore, chemical, and other harsh environments.

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 ranges from 32-46 kg cm (24-40 in-lb).

Mounting Thread and Agency Approval Options

Notably, the 330500-06-CN includes the -06 mounting thread option, which specifies 5/8-18 UNF threads for secure mechanical attachment. Additionally, the -CN agency approval option indicates country-specific certifications that comply with local regulatory requirements. This makes the sensor suitable for installations in regions with unique certification frameworks.

Hazardous Area Approvals and Regulatory Compliance

The 330500 series 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.

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 330500-06-CN 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 mounting thread does the 330500-06-CN use?
   The -06 option specifies 5/8-18 UNF threads, which are suitable for specific mounting adapters in certain machinery applications.

2. What does the -CN agency approval option mean?
   The -CN designation indicates country-specific certifications that meet local regulatory requirements for the target installation region.

3. Can the 330500-06-CN be used in explosive atmospheres?
   Yes, the 330500 series carries ATEX and AEx certifications for both Division 1 and Division 2 hazardous areas.

4. 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.

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.