Bently Nevada 330500-03-04 Velomitor Piezo-velocity Sensor

Description

The 330500-03-04 Velomitor Piezo-velocity Sensor is an industrial-grade, solid-state transducer designed to monitor absolute casing, bearing housing, and structural vibration. This configuration features a 1/4-28 UNF mounting thread (Option 03) and carries multiple hazardous area approvals, including CSA and ATEX (Option 04). Engineered as a specialized piezoelectric accelerometer with integrated electronics, this sensor contains no moving parts, preventing mechanical wear and degradation while allowing for flexible mounting orientations including vertical, horizontal, and radial. This Velomitor Piezo-velocity Sensor provides consistent performance for critical machinery protection, particularly when measuring rotor vibration transmitted to the machine casing. It is housed in a hermetically sealed 316L stainless steel case to ensure reliability in challenging industrial environments. Proper installation on the bearing housing or casing is essential, as incorrect mounting may degrade frequency response or introduce signal interference.

Features

• Integrated solid-state electronics with no moving parts for reduced mechanical wear
• 316L stainless steel, hermetically-sealed case for environmental durability
• 1/4-28 UNF mounting thread adapter (Option 03)
• Multiple agency approvals including CSA and ATEX (Option 04)
• Case-isolated grounding to minimize electrical noise interference
• Operates across a wide temperature range from -55 Celsius to 121 Celsius
• Compatible with standard 2-pin MIL-C-5015 connectors

Applications

The 330500 Velomitor sensor is used in heavy industry to measure machine casing and structural vibration. Typical scenarios include:

• Power generation equipment and turbines
• Oil and gas compressors and pumps
• Petrochemical and industrial rotating machinery
• Water treatment and mining infrastructure

Ordering Information

Option	Code	Description
Orderable Part Number	330500-03-04	Velomitor Piezo-velocity Sensor
A - Mounting Thread Adapter	03	1/4-28 UNF
B - Agency Approval	04	Multiple approvals (CSA, ATEX)

Technical Specifications

Parameter	Value
Manufacturer	Bently Nevada (Baker Hughes)
Part Number	330500-03-04
Sensitivity	3.94 mV/mm/s (100 mV/in/s) +/- 5%
Velocity Range	1270 mm/s (50 in/s) peak
Frequency Response	4.5 Hz to 5 kHz (+/- 3.0 dB)
Operating Temperature	-55 Celsius to 121 Celsius
Housing Material	316L stainless steel
Connector	2-pin MIL-C-5015
Grounding	Case isolated
Shock Survivability	5,000 g peak
Weight	0.142 kg

Installation Guidelines

• Ensure the sensor is mounted directly to the machine casing or bearing housing using the specified mounting adapter.
• Observe the maximum mounting torque of 32-46 kg cm (24-40 in-lb).
• Use shielded cabling to maintain signal integrity, particularly in areas with high electromagnetic interference.
• When integrating to measure displacement, be aware that electrical noise may be amplified; prioritize velocity monitoring for optimal performance.
• Ensure installation in hazardous areas complies with the specific requirements of the approved entity parameters (CSA/ATEX).