Abstract: A scanning device is capable of monitoring a plurality of sensors each of which generate a voltage representative of the parameter being monitored. Multiplexers are provided for continually scanning the sensor channels and displaying the appropriate measurement on a display monitor. Circuitry is provided for converting the displayed measurement from a pure voltage to a temperature. Additionally, switches are provided for causing the scanner to scan only a desired number of channels. Stop channel select switches are provided to cause the scanner to stop on a desired channel, and a light emitting diode display indicates exactly what channel is being monitored.