The VH990 two-wire shaft vibration transmitter converts the peak value of vibration displacement into 4 to 20mA industry standard signals to provide vibration monitoring protection and alarm for machinery.

VH990 two-wire shaft vibration transmitter is mainly used to measure the vibration of mechanical rotating shaft. It can be very convenient and industrial site existing PLC or DCS system directly connected, using 4 to 20mA loop power supply, does not need additional power distribution and instrument conversion, can be simple and convenient, low cost and effective vibration monitoring protection for rotating equipment.

VH990 two-wire shaft vibration transmitter, is essentially an eddy current sensor, its probe can measure the displacement change between the measured object (metal) and the probe. When the distance between the measured object and the probe changes back and forth, that is, the measured object vibrates, and the transmitter can convert the peak-to-peak value of this back and forth displacement change into 4 to 20mA current signal as required.

For each bearing to be monitored, there will be one or two radially mounted sensors. If only one sensor is installed, it is usually located at the top center on the bearing. If two sensors are used, they are usually installed at a 90° Angle.