Product Description:

The 190501-09-99-01 is the Velomitor CT piezoelectric velocity sensor from Bently Nevada, designed for low-speed casing vibration monitoring of cooling tower and air-cooled heat exchanger fan assemblies. As a low-frequency version of the standard Velomitor sensor, this model can effectively measure the casing vibration velocity of equipment rotating at 90 rpm and above (typical operating range 100–300 rpm), while also covering the vibration frequency components generated by fan motors and reducers. It is suitable for monitoring and protecting against common rotor mechanical faults such as imbalance and misalignment.

Frequently Asked Questions (FAQ)

Q:How does a Velomitor CT differ from a standard Velomitor?
A:The primary difference is the low-frequency optimization. A standard Velomitor (such as the 330500 model) cuts off higher up in frequency and cannot reliably read low-speed vibrations. The Velomitor CT features altered internal processing to cleanly track machinery turning at speeds as low as 90 RPM without signal distortion or noise floor drop-off.
Q:Can I swap a legacy Velomitor CT with the 190501-09-99-01 directly?
A:Yes. The core electrical characteristics (sensitivity and impedance) match older variations. However, because this specific part configuration contains the -09 Quick Disconnect option, ensure that your structural mounting surface is fitted with a matching quick-disconnect receptacle rather than a standard threaded stud hole.

Q:What mounting orientation is required?
A:The sensor can be installed in any orientation without degrading the internal piezo-velocity mechanism. The designated housing location must be rigid and clean to ensure that rotor vibration directly passes into the transducer body.

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