Products Description
The Bently Nevada 190501-01-99-01 Velomitor CT Velocity Transducer is a velocity sensor specifically developed for vibration monitoring in industrial equipment. A low-frequency version of the standard Velomitor piezoelectric velocity sensor, it is specifically designed to measure the casing vibration velocity of equipment such as cooling towers and air-cooled heat exchanger fan assemblies, which typically operate at speeds of 90 rpm and above (typically 100 to 300 rpm). This sensor not only accurately measures vibration amplitude within this frequency range but also effectively captures the vibration frequencies generated by fan motors and reducers, providing critical data for assessing equipment operating status.
Technical Specifications

Manufacturer: Bently Nevada
Product Model: 190501-01-99-01
Product Type: Velomitor CT Velocity Transducer
Country of origin: USA
190501-AA-BB-CC
A: Mounting Hardware Option: 01 = Stud 3/8-in 24 to 3/8-in 24
B: Connection Option: 99 = Unit with included 32-foot cable
C: Agency Approval Option: 01 = CSA/NRTL/C (Class I, Division 1),ATEX/IECEx/CSA (Class I, Zone 0/1)
Installation Guide
- Mounting Location Determination: Preferable mounting locations should be located on rigid surfaces such as the equipment's bearing housing or housing to ensure the sensor accurately senses vibration. The mounting location should be as far away from vibration nodes as possible to avoid measurement errors.
- Mounting Hardware Connection: Securely mount the sensor to the designated location using the selected mounting hardware (e.g., 3/8 - 24 threaded studs). Ensure a secure installation to prevent the sensor from loosening during equipment vibration and affecting measurement accuracy.
- Cable Connection and Routing: Connect the sensor and signal transmission cable using the correct polarity and connector type. After connection, ensure the cable is free of twisting or stretching. When routing, minimize cable routing away from sources of strong electromagnetic interference, such as large motors and inverters. If necessary, use shielded cable and ensure proper grounding to ensure stable signal transmission.
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