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The 330750 and 330752 High Temperature Velomitor Systemsensor head and integral cable are designed for hightemperature environments. This enables you to mount thesensing head on surfaces with temperatures up to +400°C(+752°F)

To accomplish this, the transducer design segregates thesensing element from the signal conditioning electronics. Thetwo are permanently connected using an integrated cable.The integrated cable eliminates connectors which are asignificant source of transducer failures.

The cable enables you to position the signal conditioningelectronics in a cooler location. The internal electronicswithstands temperatures of 55°C to +121°C (-67°F to +250°F).The integrated design makes it possible to capturemachinery performance data comparable to other BentlyNevada Velomitor transducers, but at significantly highertemperatures.

Frequently Asked Questions

How do I visually distinguish the 330750 from the 330752 model?

The 330750 features a top-exit cable configuration, while the 330752 utilizes a 90-degree side-exit cable layout for low-clearance installations.

What is the 330750-60-CN measurement sensitivity of this system?

The nominal sensitivity is 5.7 mV/mm/s (145 mV/in/s) ±5% at a reference frequency of 100 Hz.

What is the frequency response limits?

The system operates accurately from 15 Hz to 2,000 Hz (±3.0 dB). Its core precision range is 20 Hz to 1,000 Hz (±0.9 dB).

What torque specification must be applied when mounting the 330750-60-CN sensor head?

The sensor head must be torqued precisely to 4.5 N·m (40 in·lb) to ensure accurate high-frequency vibration transmission.

Product Applications

Power Industry: Used to monitor the absolute vibration velocity of gas turbine casings, steam turbine bearing housings, large induced draft fans, and generator sets.

Oil & Gas and Petrochemical Plants: Used to monitor core rotating machinery such as large centrifugal compressors, high-temperature pumps, and steam turbine drive units.

Metallurgical and Steel Plants: Deployed at bearing monitoring points in continuously operating environments with extremely high ambient temperatures, such as coking units, high-temperature fans, and blast furnace blowers.