Product Description:

The Bently Nevada 190501-22-00-04 is a dedicated model of the Velomitor CT (cooling tower) velocity sensor. This low-frequency piezoelectric sensor is specifically designed to measure the mechanical casing vibration of low-speed equipment such as cooling towers and air-cooled heat exchangers.The Velomitor CT velocity sensor is a low-frequency version of the standard Velomitor piezoelectric velocity sensor, specifically designed to measure the casing vibration velocity of cooling towers and air-cooled heat exchanger fan assemblies, which typically operate at speeds not less than 90 rpm (typically ranging from 100 to 300 rpm). The sensor can measure vibration amplitude within this frequency range, and can also detect vibration frequencies generated by the fan motor and reducer.

Frequently Asked Questions (FAQ)

QHow does it differ from a standard 330500 Velomitor?
A:The 190501 CT is a low-frequency version. Standard velomitors roll off drastically at low frequencies, whereas the CT version is optimized to accurately track vibration amplitudes generated by slow-moving fan blades, speed reducers, and gearboxes.
Q:Does this transducer require specialized calibration?
A:Yes, due to its deep low-frequency profile, standard shaker tables cannot accurately calibrate it at 90 CPM. It requires a specialized low-frequency loop, such as The Modal Shop Portable Vibration Calibrator, to verify its performance near the 1.5 Hz boundary

Q:What are the primary applications for this sensor?
A:It is engineered primarily for cooling tower fans and air-cooled heat-exchanger fan assemblies. It is ideal for slow-turning machinery operating at or above 90 RPM (typically 100 to 300 RPM ranges) where standard velocity sensors lack sufficient low-frequency sensitivity.

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