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The Bently Nevada 190501-11-99-CN is a Velomitor CT Velocity Transducer engineered for vibration monitoring on low-speed rotating equipment. It is optimized for applications where conventional velocity sensors may not provide sufficient sensitivity at lower operating frequencies, making it an effective solution for machinery that operates continuously at relatively slow rotational speeds.

Designed to monitor absolute casing vibration velocity, the 190501-11-99-CN is commonly installed on cooling tower fans and air-cooled heat exchanger (ACHE) fan systems. These machines typically operate between 100 and 300 rpm, although the transducer is capable of monitoring equipment running at speeds of 90 rpm or higher. Its low-frequency response allows maintenance personnel to obtain reliable vibration data from equipment that would otherwise be difficult to evaluate using standard vibration sensors.

Frequently Asked Questions

Q: What is the Bently Nevada 190501-11-99-CN?

A: It is a Velomitor CT (Cooling Tower) Low-Frequency Casing Vibration Velocity Sensor manufactured by Bently Nevada .

Q: What is the standard measurement sensitivity of this sensor?

A: The nominal sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%.

Q: What is its frequency response range, and what is the lowest RPM it can measure?

A: The frequency response is 1.5 Hz to 1.0 kHz (±3.0 dB). This allows it to accurately track machine vibrations down to 90 RPM.

Q: What is the maximum vibration amplitude range (velocity limit) for this sensor?

A: The peak velocity limit is 63.5 mm/s pk (2.5 in/s pk).

Product Applications

Oil & Gas: Monitoring of cooling and heat dissipation systems for large units in oil refineries and liquefied natural gas (LNG) plants.

Petrochemical: Condition monitoring and predictive maintenance of various large air coolers and cooling tower fans in chemical reaction processes.

Power Generation: Low-frequency vibration protection for circulating water cooling tower fans and unit casings in power plants.

Large-scale Metallurgy: Condition monitoring of casings for large heat dissipation and ventilation equipment in steel plants and non-ferrous metal smelting plants.