Bently Nevada 330500-06-00 Velomitor Piezo-velocity Sensor

Product Introduction

The Bently Nevada 330500-06-00 is a robust Velomitor Piezo-velocity Sensor for machine condition monitoring. This sensor converts mechanical vibration directly into a velocity-proportional signal. Therefore, it eliminates the need for external integrators or signal conditioners. It suits a wide range of rotating equipment including pumps, compressors, turbines, fans, and motors.

This particular model features a 5/8 – 18 UNF mounting thread. Additionally, it carries no agency approvals (suffix -00). For this reason, it is ideal for non-hazardous industrial environments where certifications are not required. The sensor operates reliably across extreme temperatures from -55°C to 121°C (-67°F to 250°F). Furthermore, its hermetically-sealed 316L stainless steel case provides excellent protection against moisture, dust, and corrosion. Each unit is manufactured in the U.S.A. Moreover, it ships in original factory packaging.

Technical Specifications

The 330500-06-00 delivers accurate velocity measurements across a wide frequency range. Its electrical sensitivity is rated at 3.94 mV/mm/s (100 mV/in/s) ±5% at 100 Hz reference. Frequency response spans 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) with ±3.0 dB tolerance. Meanwhile, the narrower band of 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm) achieves ±0.9 dB precision for critical monitoring applications.

Key electrical parameters:

• Velocity range: 1270 mm/s (50 in/s) peak

• Output bias voltage: -12 ±3.0 VDC referenced to Pin A

• Dynamic output impedance: Less than 2400 Ω

• Broadband noise floor (4.5 Hz to 5 kHz): 0.004 mm/s rms nominal

• Amplitude linearity: ±2% to 152 mm/s (6 in/s) peak

• Transverse sensitivity: Less than 5% of sensitivity

The mounted resonant frequency exceeds 12 kHz. Consequently, it ensures accurate readings well above typical machine vibration frequencies. Temperature sensitivity varies from -14% to +7.5% typical over the full operating range. Nevertheless, this remains within acceptable limits for industrial monitoring systems.

Mechanical and Environmental Ratings

This Velomitor Piezo-velocity Sensor is engineered for demanding industrial environments. The 316L stainless steel case measures 25.3 mm (0.995 in) in diameter. In addition, it stands 63.2 mm (2.49 in) in height. It weighs approximately 142 grams (5.0 oz). The 2-pin Mil-C-5015 connector features a hermetically-sealed 316L stainless steel shell. Therefore, it offers maximum environmental protection.

Environmental limits:

• Operating temperature: -55°C to 121°C (-67°F to 250°F)

• Shock survivability: 5,000 g peak maximum

• Relative humidity: Up to 100% non-submerged (case is hermetically-sealed)

Additionally, the sensor offers excellent immunity to interference. Base strain sensitivity is rated at 0.005 in/s/mstrain. Magnetic field susceptibility measures less than 51 min/s/gauss at 50 gauss, 50-60Hz. The case is isolated from ground. For this reason, it helps prevent ground loop issues in many installations.

Compliance and Certifications

Although the 330500-06-00 carries no hazardous area approvals (suffix -00), it still meets essential regulatory standards. Specifically, the sensor complies with FCC Part 15 regulations. Moreover, it meets EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU. Maritime approvals from DNV cover ships, high-speed craft, and offshore standards. Therefore, these certifications ensure reliable operation in marine and general industrial environments.

For hazardous area installations, consider other 330500 models. For instance, choose -01 (CSA/US/C) or -02 (ATEX) agency approval options.

Installation Guidelines

Installing the Bently Nevada 330500-06-00 requires proper torque and cable selection. First, mount the sensor using the 5/8-18 UNF thread. Apply a maximum torque of 32-46 kg cm (24-40 in-lb). Exceeding this torque may damage the sensor. Besides that, it could affect its performance characteristics.

For the cable, use part number 02173006 or equivalent 2-conductor shielded cable. The maximum cable length is 305 meters (1,000 feet) without signal degradation. However, for installations with high vibration (50g at 10 kHz) and cable capacitance of 200 pF/m, the recommended length is 208 feet (63 meters). Finally, always observe polarity: when the sensor case moves toward the connector, Pin A becomes positive with respect to Pin B.

Packaging List

Each new original 330500-06-00 unit comes in factory-sealed packaging. The box contains:

• 1 x Velomitor Piezo-velocity Sensor (5/8-18 UNF thread, no agency approvals)

• 1 x Mounting instruction sheet

Note: Certificates and warranty documents are not included in the package.

Shipping Information

All orders ship via FedEx, UPS, or DHL with full tracking. International delivery typically takes 3–7 business days. Additionally, expedited shipping options are available upon request.

Frequently Asked Questions

1. Why does this model have no agency approvals?
The -00 suffix indicates that hazardous area certifications are not required. Therefore, this model is intended for non-hazardous industrial environments where ATEX, CSA, or other approvals are unnecessary.

2. Can I use this sensor in a hazardous area?
No. For hazardous locations, select a 330500 model with -01 (CSA/US/C) or -02 (ATEX) approval. The 330500-06-00 is not certified for explosive atmospheres.

3. What is the advantage of the 5/8-18 UNF thread?
This larger thread size provides stronger mounting for heavy machinery. Moreover, it offers increased mechanical stability compared to smaller thread options, especially in high-vibration applications.

4. How do I test the sensor after installation?
First, measure the output bias voltage between Pin A and Pin B. It should read -12 ±3.0 VDC. Additionally, you can verify sensitivity using a portable vibration calibrator.

5. Is this sensor compatible with Bently Nevada monitoring systems?
Yes. The 330500-06-00 works with all Bently Nevada monitors and data acquisition systems that accept Velomitor sensor inputs. However, always confirm system compatibility before installation.