Product Description:

The Bently Nevada 190501-23-00-04 is a specific configuration of the Velomitor CT (cooling tower) velocity sensor. This is a dedicated low-frequency piezoelectric sensor primarily used to measure the vibration velocity of the casing of low-speed industrial machinery. 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)

Q:What type of cabling does it require?
A:It uses a 2-pin MIL-C-5015 twisted-shielded pair cable assembly. The internal electronics are fully isolated from the stainless steel housing case to eliminate ground loops. It can support a maximum cable run of up to 305 meters (1,000 feet) without signal degradation.
Q:Is this sensor safe for hazardous environments?
A:Yes. The -04 agency approval suffix certifies the unit for deployment in Class I, Division 1/2 (Groups A, B, C, D) and ATEX Zone 0/1/2 environments when integrated with appropriate intrinsic safety barriers or galvanic isolators.

Q:Why choose a Velomitor "CT" over a standard Velomitor?
A:Standard velocity sensors struggle to capture the ultra-low rotational speeds of cooling tower fans. The CT variant is optimized to accurately track vibrations at or above 90 RPM (typically 100 to 300 RPM) without suffering from significant low-frequency signal roll-off

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