Bently Nevada† Seismoprobe† Velocity Transducer Systems are designed to measure absolute (relative to free space) bearing housing, casing, or structural vibration. The two-wire systems consist of a transducer and an appropriate cable. The Seismoprobe family of velocity transducers is a two-wire design that uses moving-coil technology. It provides a voltage output directly proportional to the transducer's vibration velocity.
Moving-coil transducers are less sensitive to impact or impulsive excitation than solid-state velocity transducers, which are inherently accelerometers with embedded integration electronics. They can represent a good choice for certain applications. Because they don’t require external power, they are convenient for portable measurement applications.
Two types of Seismoprobe Velocity Transducer are available:
9200: The 9200 is a two-wire transducer suitable for continuous monitoring or for periodic measurements in conjunction with a test or diagnostic instrument. When ordered with the integral cable option, the 9200 has excellent resistance to corrosive environments without the need for additional protection.
74712: The 74712 is a high-temperature transducer model of the 9200.
The Bently Nevada 370300 accelerometers are designed to provide high electrical isolation between the base of the transducer and its internal electronics. This isolation offers greater protection against arcing/electrostatic discharge (ESD), as high as 6,000 volts. The transducer provides an amplitude range of 80 g peak and a sensitivity of 100 mV/g.
The 350900 High-Temperature Velocity and Acceleration Sensor (HTVAS) provides a continuous acceleration and velocity output, allowing the customer to protect their machine with a velocity signal while simultaneously capturing the acceleration signal for machinery diagnostics. Its design is primarily for use with the 3500/42M and 3500/44M monitors. When attaching the HTVAS to a 3500/42M or 3500/44M monitor you must use the acceleration and velocity signals from the transducer on a separate channel pair (such as channels 1 and 3) or on separate monitors.