Bently Nevada 190501-12-00-00 Velomitor CT Velocity Transducer

Description

The 190501-12-00-00 is a Velomitor CT Velocity Transducer configured with a Plate Stud mounting (3/8-24 to M8x1, Option 12), a standard MIL-C-5015 connection interface (Option 00), and no hazardous area approvals (Option 00). This piezo-velocity sensor is a low-frequency version of the standard Velomitor transducer, optimized for monitoring casing vibration velocity on cooling tower and air-cooled heat exchanger fan assemblies that typically operate at or above 90 rpm. By measuring vibration amplitudes at fan operating frequencies as well as those generated by speed reducers and motors, the transducer provides effective monitoring of machine malfunctions such as unbalance and misalignment. The sensor features internal electronics isolated from the stainless steel case, ensuring accurate signal transmission. For optimal performance, the device must be installed directly on the bearing housing or machine casing to avoid false signals or reduced frequency response.

Features

• Option 12 mounting hardware: Plate Stud 3/8-in 24 to M8x1 adapter
• Option 00 connection: MIL-C-5015 connection interface
• Option 00 agency approval: No approvals
• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) +/- 5%
• Frequency response: 3.0 Hz to 900 Hz (+/- 1.0 dB)
• Case material: 316L stainless steel
• Operating temperature range: -40 degC to +85 degC (-40 degF to +185 degF)
• Internal electronics isolated from case

Applications

• Cooling tower fan assemblies
• Air-cooled heat exchanger fan assemblies
• Machinery with casing vibration monitoring requirements (operating at or above 90 rpm)
• Monitoring of machine malfunctions including unbalance and misalignment

Ordering Information

Option	Code	Description
Orderable Part Number	190501-12-00-00	Velomitor CT Velocity Transducer
A - Mounting Hardware	12	Plate Stud 3/8-in 24 to M8x1
B - Connection Option	00	MIL-C-5015 connection interface
C - Agency Approval	00	No Approvals

Technical Specifications

Manufacturer	Bently Nevada (Baker Hughes)
Part Number	190501-12-00-00
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)
Resonant Frequency	9 kHz minimum (stud mounted)
Output Bias Voltage	10.1 Vdc +/- 1.0 Vdc
Case Material	316L stainless steel
Connector	2-pin 316L stainless steel MIL-C-5015, top
Operating Temperature	-40 degC to +85 degC (-40 degF to +185 degF)
Storage Temperature	-40 degC to +100 degC (-40 degF to +212 degF)
Shock Limit	5000 g pk maximum
Humidity Limit	100% condensing, non-submerged
Weight	<297 g (10.5 oz) typical

Installation Guidelines

• Install on bearing housing or machine casing for effective vibration transmission.
• Mounting torque: 4.5 N-m +/- 0.6 N-m (40 in-lbf +/- 5 in-lbf).
• Ensure mounting surface is prepared; clean and tap threads as required by the chosen mounting stud.
• Use appropriate conduit fittings (e.g., 1/2-in NPT conduit adapter 128608-02) to protect cable connections.
• For applications requiring specialized housing measurements, consult Bently Nevada installation manuals.