Product Description:

The Bently Nevada 190501-08-00-04 is a Velomitor CT (Cooling Tower) Velocity Transducer, a specialized low-frequency vibration sensor primarily used to monitor casing vibration velocity on cooling tower fan assemblies and air-cooled heat exchangers (fin-fans).
The Velomitor CT Velocity Transducer is a low-frequency version of our standard Velomitor Piezo-velocity Sensor. Its design specifically measures casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies that operate at or above 90 rpm (100 to 300 rpm typical).  The Velomitor CT Transducer can measure vibration amplitudes at these frequencies as well as the vibration
frequencies generated by the fan motor and speed reducer.

Frequently Asked Questions (FAQ)

Q:What is the primary application for this transducer?
A:It is explicitly designed to measure low-frequency casing vibration velocity on cooling towers and air-cooled heat exchanger fan assemblies. It accurately tracks slow-speed rotation frequencies as well as faults generated by the fan motor and speed reducer.
Q:How do you wire the sensor connection?
A:The device utilizes a 2-pin MIL-C-5015 top connector. Pin A goes positive relative to Pin B when the casing velocity moves from the base to the top of the sensor. It is recommended to pair it with a shielded, twisted-pair cable encased in a splash-proof jacket.

Q:Why choose the Velomitor CT over a standard Velomitor?
A:Standard piezo-velocity sensors lack the sensitivity required to accurately capture lower-frequency waves generated by machinery rotating under 300 RPM. The "CT" variant shifts the frequency response floor down to 3.0 Hz (180 CPM) to safely monitor massive, slow-moving fan blades before catastrophic mechanical breakdown occurs.

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