Description

The 190501-02-00-04 Velomitor CT Velocity Transducer is a specialized, low-frequency sensor engineered to measure casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies. This configuration features a 3/8-in 24 to 1/2-in 20 mounting stud (Option 02), a standard MIL-C-5015 connection interface (Option 00), and no hazardous area approvals (Option 04). Designed specifically for machinery operating at or above 90 rpm, this piezo-velocity sensor effectively monitors vibration amplitudes generated by the fan motor and speed reducer. It provides critical data for detecting common machine malfunctions such as unbalance and misalignment. For effective machine protection, the transducer should be installed on the bearing housing or machine casing to ensure accurate transmission of rotor vibration to the sensor.

Features

• Designed for low-frequency vibration monitoring (100 to 300 rpm typical)
• Option 02 mounting: 3/8-in 24 to 1/2-in 20 stud for robust attachment
• Option 00 connection: Standard MIL-C-5015 2-pin interface
• Option 04: Standard configuration for non-hazardous application environments
• 316L stainless steel case material for durability in industrial conditions
• Output: 100 mV/in/s (3.94 mV/mm/s) sensitivity
• Internal electronics isolated from case to prevent ground loops

Applications

• Cooling tower fan assemblies
• Air-cooled heat exchanger fans
• Low-speed rotating machinery vibration monitoring
• General casing vibration measurement in industrial environments

Ordering Information

Option	Code on This SKU	Description
Orderable Part Number	190501-02-00-04	Velomitor CT Velocity Transducer
A - Mounting Hardware	02	Stud 3/8-in 24 to 1/2-in 20
B - Connection	00	MIL-C-5015 connection interface
C - Agency Approval	04	CSA/NRTL/C (Class I, Div 1), ATEX/IECEx (Class I, Zone 0/1)

Technical Specifications

Manufacturer	Bently Nevada (Baker Hughes)
Part Number	190501-02-00-04
Sensitivity	3.94 mV/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 degC to +85 degC
Case Material	316L stainless steel
Connector	2-pin 316L stainless steel MIL-C-5015, top
Weight	< 297 g (10.5 oz) typical
Mounting Torque	4.5 N-m +/- 0.6 N-m (40 in-lbf +/- 5 in-lbf)

Installation Guidelines

• Install transducer directly on the bearing housing or machine casing for optimal signal response.
• Ensure the mounting surface is clean and flat; use the supplied mounting stud (Option 02) to secure the sensor.
• Tighten mounting to 4.5 N-m (40 in-lbf) to maintain frequency response.
• Avoid installation in locations that may cause false signals; ensure cable routing minimizes interference.
• Compatible with standard MIL-C-5015 interface cables.

Compliance and Certifications

• CE Compliant
• RoHS Directive 2011/65/EU
• EMC Directive 2014/30/EU
• Hazardous Area Approvals (Option 04): CSA/NRTL/C (Class I, Div 1), ATEX/IECEx (Class I, Zone 0/1)