Bently Nevada 330500-03-01 Velomitor Piezo-velocity Sensor

Description

The 330500-03-01 is a Velomitor Piezo-velocity Sensor configured with a 1/4-28 UNF mounting thread (Option 03) and no specific agency approval (Option 01 - CSA/US/C). This specialized piezoelectric accelerometer is designed for measuring absolute casing, bearing housing, or structural vibration on rotating machinery. By utilizing solid-state electronics with no moving parts, the 330500 provides long-term stability and immunity to mechanical wear, allowing for installation in any orientation—vertical, horizontal, or angled.

This sensor incorporates integrated electronics to convert raw piezoelectric signals into velocity-proportional outputs. It is suitable for monitoring applications where the transmission of rotor vibration to the machine casing is significant. For best performance, the sensor must be rigidly mounted on the bearing housing or casing to ensure accurate amplitude and frequency response. Users should avoid integrating this sensor's output to measure displacement, as electrical noise amplification can degrade measurement data.

Features

• Mounting: 1/4-28 UNF thread (Option 03)
• Agency Approval: CSA/US/C (Option 01)
• Design: Solid-state piezoelectric accelerometer with integrated electronics; no moving parts
• Output: 3.94 mV/mm/s (100 mV/in/s) sensitivity
• Housing: Hermetically sealed 316L stainless steel case
• Connector: 2-pin Mil-C-5015 receptacle, hermetically sealed
• Orientation: Flexible mounting capability (vertical, horizontal, or angled)
• Environmental: Operating temperature range from -55 degC to 121 degC

Applications

• Absolute bearing housing vibration monitoring
• Casing vibration measurements for industrial rotating machinery
• Structural vibration monitoring in power generation, petrochemical, and oil and gas facilities
• General purpose machinery protection

Ordering Information

Technical Specifications

Installation Guidelines

• Install the sensor directly on the bearing housing or machine casing using the specified 1/4-28 UNF thread.
• Ensure rigid mounting to prevent amplitude and frequency response degradation.
• Observe a maximum mounting torque of 32-46 kg cm (24-40 in-lb).
• For cable connections, use appropriate twisted, shielded cables to maintain signal integrity over long distances.
• Avoid integrating the sensor output to determine displacement to prevent signal noise amplification.

Compliance and Certifications

• CSA/US/C (Agency Approval Option 01)
• CE compliant
• RoHS Directive 2011/65/EU compliant
• FCC Part 15 compliant