Range & Span

          It is the maximum value of output we are expecting from the sensor. For example, if we are measuring temperature upto 100 degrees, using a thermometer, we expect that the thermometer must show a reading of 100 degrees. Therefore, the range of the thermometer must be at least 100 degrees.
Thus, Range is the maximum value of reading given by the sensor. A proximity sensor used to sense an object 30 cm away from it, must have a range of at least 30 cm. A normal measuring scale having a maximum reading of 15 cm is said to have a range of 15 cm.
Span is the difference in the maximum and minimum values read by the sensor. If the minimum output is 0, then span=range.
Sensor Characteristics
A Bourdon Gauge (Pressure sensor) having a Range of 600 bar