Product Description:

TThe part number 190501-00-00-01 refers to a Bently Nevada Velomitor CT (Cooling Tower) Velocity Transducer. Its core industrial application is measuring low-frequency casing vibration on rotating machinery operating at or above 90 RPM.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 sensor?
A:It is designed specifically for cooling towers and air-cooled heat exchangers (fin fans). These systems feature large fan assemblies that rotate at low speeds, typically between 100 and 300 RPM. Standard vibration sensors cannot accurately capture these low-frequency movement profiles.
Q:How does the wiring work?
A:The transducer uses a 2-wire system utilizing a positive common reference. Pin A goes positive relative to Pin B when the casing velocity moves from the base toward the top of the transducer. The internal electronics are completely isolated from the outer stainless steel case to prevent ground loops.

Q:What are the mounting requirements?
A:The sensor can be installed in any orientation. It requires a flat, smooth mounting surface of at least 33 mm (1.3 in) in diameter. The proper installation torque is 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf). Incorrect torque can lead to invalid or heavily attenuated frequency response data.

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