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The Velomitor CT Velocity Transducer is a low-frequency version of the standard Velomitor Piezo-velocity Sensor. It is specifically designed to measure casing vibration velocity on cooling tower and air-cooled heat exchanger fan assemblies that operate at or above 90 rpm (typically 100 to 300 rpm). The Velomitor CT Transducer is capable of measuring vibration amplitudes at these frequencies, as well as the vibration frequencies generated by the fan motor and speed reducer.

In addition, it is important to install the accelerometer transducer on the bearing housing or machine casing. Improper installation may reduce the transducer’s amplitude and frequency response, or generate false signals that do not accurately represent actual vibration. Refer to the appropriate instruction manuals and Application Notes for proper installation guidelines.

Upon request, Bently Nevada provides engineering services to identify the appropriate machine housing measurements and offer installation assistance if needed.

Frequently Asked Questions

Q1: What is the Bently Nevada 190501-08-99-00?

A1: It is a velocity transducer (Velomitor® type) used for measuring vibration velocity in rotating machinery for condition monitoring and predictive maintenance.

Q2: What mounting hardware does it use?

A2: It uses mounting hardware option “08,” which is a plate stud adapter from 3/8-24 to 1/2-20 thread.

Q3: What does the “99” connection option mean?

A3: “99” indicates the unit is supplied with an integrated 32-foot cable for extended installation reach.

Q4: What is the 190501-08-99-00 sensitivity?

A4: The sensitivity is 3.94 mV/mm/s (100 mV/in/s) with a tolerance of ±5%, ensuring accurate vibration measurement.

Q5: What is the 190501-08-99-00 frequency response?

A5: The 190501-08-99-00 frequency response is 3.0 Hz to 900 Hz (180 to 54,000 cpm) with ±1.0 dB accuracy.

Product Applications

Electric power industry: Monitoring the vibration of cooling tower fans and bearing boxes of large power generation units.

Petroleum and chemical industry: Air condensers (air coolers), wind machinery components, pump sets, and centrifugal machines and other rotating equipment.

Metallurgy and heavy manufacturing: Asset protection and condition monitoring for large slow-speed rotating machinery.

Environmental control: Due to its low-frequency response characteristics (as low as 1.5 Hz), it is particularly suitable for cooling tower fans and air-cooled heat exchangers with rotational speeds above 90 rpm.