Bently Nevada 330500-00-CN Velomitor Sensor

Product Introduction

The Bently Nevada 330500-00-CN Velomitor Piezo-velocity Sensor represents a cornerstone in modern machinery protection. This sensor excels at providing accurate, repeatable velocity measurements for a wide array of rotating equipment. Its piezoelectric design ensures a robust, low-maintenance solution for critical asset monitoring. Furthermore, this model features the "-CN" agency approval for country-specific compliance and a standard mounting thread without an adapter, which facilitates straightforward installation. Reliability and precision are built into every aspect of this sensor, ensuring you maintain operational excellence.

Technical Specifications

Electrical Characteristics

The sensor delivers a standard sensitivity of 3.94 mV/mm/s (100 mV/in/s) with a tolerance of ±5%. Its frequency response extends exceptionally wide, ranging from 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) at ±3.0 dB. For more critical applications, the response is ±0.9 dB from 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm). Notably, the output bias voltage is -12 ±3.0 VDC, referenced to Pin A. The dynamic output impedance is less than 2400 Ω, which ensures signal integrity over long cable runs.

Performance Metrics

This model demonstrates excellent amplitude linearity of ±2% up to 152 mm/s (6 in/s) peak. Its transverse sensitivity is minimal, at less than 5% of the main sensitivity. The mounted resonant frequency exceeds 12 kHz, which effectively prevents signal interference from structural resonances. Additionally, the broadband noise floor (4.5 Hz to 5 kHz) is a nominal 0.004 mm/s (160 μin/s) rms, ensuring a clean output even in electrically noisy environments.

Environmental and Mechanical Limits

Rugged Operating Conditions

The Bently Nevada 330500-00-CN excels in harsh conditions. Its operating temperature range spans from -55°C to 121°C (-67°F to 250°F). The sensor can survive shock loads up to 5,000 g peak and operates at 100% relative humidity because its housing offers a hermetically-sealed design. Furthermore, the case features isolation to prevent ground loops, and the sensor exhibits low magnetic field susceptibility (<51 min/s/gauss).

Physical Construction

Weighing just 142 grams (5.0 oz), the sensor combines durability with a lightweight profile. It features a height of 63.2 mm (2.49 in) and a diameter of 25.3 mm (0.995 in). High-grade 316L stainless steel forms the case, providing excellent corrosion resistance. It also includes a hermetically-sealed 2-pin Mil-C-5015 connector with a 316L stainless steel shell.

Installation and Connectivity

Mounting Guidelines

The sensor utilizes a standard 1/4-28 UNF mounting thread. The recommended mounting torque ranges between 32-46 kg cm (24-40 in-lb) maximum. Proper torque is essential for achieving the specified frequency response and sensitivity. Moreover, the sensor's polarity follows a clear definition: when the case moves toward the connector, Pin A becomes positive with respect to Pin B.

Cable Recommendations

To maximize performance, a maximum cable length of 305 meters (1,000 feet) is permissible using part number 02173006 without signal degradation. For specific applications with high vibration (up to 50g at 10 kHz) and a cable capacitance of 200 pf/m, the recommended cable length is 208 feet (63m). This ensures the 330500-00-CN delivers accurate data to your monitoring system.

Compliance and Certifications

The 330500-00-CN sensor meets key international standards. It complies with FCC Part 15 requirements and adheres to the EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU. For maritime use, it holds DNV classification certifications for ships and offshore standards. Significantly, it carries approval for hazardous areas with ratings including Ex ia IIC T4 and Class I, Division 1, Groups A, B, C, and D. Such comprehensive certification makes this sensor a versatile choice for global applications.

Packaging List

• 1 x Bently Nevada Velomitor Piezo-velocity Sensor (Model 330500-00-CN)

• 1 x Installation and Wiring Guide

• 1 x Calibration Certificate (summary)

Please note: Certificates of compliance and warranty documents are available upon request but we do not include them in the standard packaging.

Frequently Asked Questions (FAQ)

Q1: What is the primary application for the Bently Nevada 330500-00-CN?
This sensor is primarily useful for vibration monitoring on rotating machinery, such as turbines, compressors, pumps, and motors, to help prevent catastrophic failures and unscheduled downtime.

Q2: Is the sensor compatible with existing monitoring systems?
Yes. It provides a standard velocity output (100 mV/in/s) and an output bias voltage of -12 VDC. This makes it compatible with most industrial PLCs and dedicated vibration monitors. However, always check your system's input requirements for full compatibility.

Q3: What is the difference between the "-00" and other mounting options?
The "-00" option in the part number signifies that the sensor ships with no adapter, utilizing the standard 1/4-28 UNF mounting thread. Other options may include adapters for different mounting hole sizes.

Q4: How does the sensor's temperature affect the output signal?
While the sensor provides reliable operation, its sensitivity can shift typically from -14% to +7.5% across its full operating temperature range. Therefore, you should compensate for this variation in highly critical measurements.

Q5: How should I ship or store this sensor?
The sensor's robust build accommodates a wide temperature range for both operation and storage. We ship our products via FedEx, UPS, or DHL with proper anti-static packaging to ensure they arrive in perfect condition.