Bently Nevada 190501-09-99-05 Velomitor CT Velocity Transducer

Description

The 190501-09-99-05 Velomitor CT Velocity Transducer is a specialized piezoelectric velocity sensor engineered for low-frequency casing vibration measurements. This configuration features a 3/8-in 24 to 1/4-in NPT plate stud (Option 09) and is supplied with an integrated 32-foot cable (Option 99). This transducer is specifically optimized for air-cooled heat exchangers and cooling tower fan assemblies that typically operate at or above 90 rpm (100 to 300 rpm typical). Designed as a low-frequency variant of the standard Velomitor Piezo-velocity sensor, this unit provides accurate vibration amplitude data for machine protection applications where monitoring at lower frequency ranges is critical. The sensor measures rotor vibration transmitted to the machine casing and is compatible with standard Bently Nevada monitoring systems. Proper installation on the bearing housing or machine casing is required to maintain measurement integrity and frequency response.

Features

• Integrated 32-foot cable (Option 99) for simplified installation on fan assemblies
• Plate stud mounting hardware (Option 09): 3/8-in 24 to 1/4-in NPT
• Optimized for low-frequency vibration monitoring (100 to 300 rpm typical)
• Internal electronics isolated from the 316L stainless steel case
• MIL-C-5015 2-pin connection interface
• Wide operating temperature range from -40 Celsius to +85 Celsius

Applications

• Cooling tower fan assemblies
• Air-cooled heat exchangers
• Low-speed rotating machinery vibration monitoring
• Casing vibration velocity measurements

Ordering Information

Option	Code	Description
Orderable Part Number	190501-09-99-05	Velomitor CT Velocity Transducer
A - Mounting Hardware	09	Plate stud 3/8-in 24 to 1/4-in NPT
B - Connection	99	Unit with included 32-foot cable
C - Agency Approval	05	Standard configured approval

Technical Specifications

Manufacturer	Bently Nevada
Part Number	190501-09-99-05
Sensitivity	3.94 mm/s (100 mV/in/s) +/- 5%
Frequency Response	3.0 Hz to 900 Hz +/- 1.0 dB; 1.5 Hz to 1.0 kHz +/- 3.0 dB
Velocity Range	63.5 mm/s pk (2.5 in/s pk)
Operating Temperature	-40 Celsius to +85 Celsius
Case Material	316L stainless steel
Connector	MIL-C-5015, 2-pin
Weight	<297 g
Mounting Torque	4.5 N-m +/- 0.6 N-m
Shock Limit	5000 g pk maximum

Installation Guidelines

• Install the transducer directly on the machine casing or bearing housing; improper mounting can lead to signal degradation or false readings.
• Ensure the mounting surface is clean and prepared for the 3/8-in 24 thread or adapter interface.
• Use the supplied 32-foot integrated cable for signal transmission; ensure cable routing avoids high-EMI zones where possible.
• Maintain the 4.5 N-m mounting torque to ensure stable frequency response and transducer performance.
• Refer to the Velomitor CT Piezo-Velocity Transducer User Guide (document 125389) for complete wiring and configuration details.

Compliance and Certifications

• CE Compliant
• EMC Directive 2014/30/EU
• RoHS Directive 2011/65/EU
• FCC Part 15 compliance