Bently Nevada

The 990 vibration transmitter is primarily used for OEMs of centrifugal air compressors, small pumps, motors, or fans. It provides a simple 4-20 mA proportional vibration signal as input for mechanical control systems.
The transmitter is a two-wire, loop-powered device that accepts input from a 3300 NSv proximity probe and its matching extension cable (5 meters in length available). The transmitter converts the signal into the appropriate peak-to-peak vibration amplitude in engineering units and provides this value as a 4-20 mA proportional industrial standard signal to the user as input to the control system.
In the control system, mechanical protection alarms and logic are triggered.
Key features of the 990 transmitter include:
Integrated Proximitor sensor, no external devices required
Non-isolated "PROX OUT" and "COM" terminals, along with a coaxial connector, provide dynamic vibration and gap voltage signal outputs for diagnostics
Non-interactive zero and range potentiometers under the transmitter label support loop adjustment
Test input pins for quick verification of loop signal output, using a function generator as input
Fault/Signal failure circuitry prevents high outputs or false alarms due to proximity probe failure or loose connections
Optional DIN rail clips or mounting screws for simplified installation.