Bently Nevada 330500-02-01 Velomitor Piezo-velocity Sensor

Description

330500-02-01: Velomitor Piezo-velocity Sensor configured with an M8 x 1 mounting thread adapter (Option 02) and CSA/US/C hazardous area certification (Option 01). This device measures absolute bearing housing, casing, or structural vibration relative to free space. It consists of a specialized piezoelectric accelerometer combined with embedded solid-state electronics, providing a direct velocity-proportional voltage output without requiring external signal conditioning modules.

In contrast to standard variants that utilize 1/2-20 UNF (Option 01) or 1/4-28 UNF (Option 03) mounting studs, this configuration includes the M8 x 1 metric thread adapter to match specific machinery housings. Since the internal architecture utilizes solid-state piezoelectric elements rather than moving mechanical parts, the sensor is immune to mechanical degradation and wear. This design permits installation at any orientation, including horizontal, vertical, or angled mounts, without affecting measurement sensitivity or long-term calibration stability.

Features

• Solid-state engineering eliminates mechanical components to prevent internal wear and calibration drift.
• Option 02 provides a factory-matched M8 x 1 threaded mounting adapter for metric housing interfaces.
• Option 01 guarantees CSA/US/C approval for installation in Division 1 and Division 2 hazardous areas.
• Corrosion-resistant housing constructed from hermetically-sealed 316L stainless steel.
• Isolated case design protects signal paths from electromagnetic interference and local ground loops.
• Supports extensive signal runs up to 305 m (1,000 ft) without degradation when paired with approved cabling.

Applications

• Casing vibration diagnostics on industrial steam and gas turbines.
• Absolute vibration tracking on high-power electric motors and generators.
• Bearing housing protection on centrifugal compressors, pumps, and fans.
• Balance and alignment analysis on critical rotating machinery trains.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Verify machinery mounting surfaces are flat, clean, and drilled to accommodate the M8 x 1 mounting thread.
• Ensure torque is applied using a calibrated wrench to remain within the 32-46 kg cm (24-40 in-lb) limit during adapter and sensor installation.
• Align the MIL-C-5015 connector pins and secure the mating cable collar firmly to achieve a moisture-resistant connection.
• To prevent inaccurate displacement data caused by noise amplification, exercise caution if integrating the velocity signal to displacement.

Compliance and Certifications

• CSA/NRTL/C: Class I, Division 1, Groups A, B, C, and D; Class II, Groups E, F, and G; Class III; Ex ia IIC T3, AEx ia IIC T3
• EMC: Electromagnetic Compatibility Directive 2014/30/EU
• FCC: Compliant with FCC Part 15 regulations
• RoHS: Compliant with EU Directive 2011/65/EU and China RoHS regulations
• Maritime: ABS Marine Vessels, Offshore Units and Structures