Mechanical*:
Pneumatic or Air Pressure
English: 3-15 psig
Metric: 0.2 - 1.0 bars (or kg/square cm.)
Electrical*:
Current: 4 - 20 mA dc
Voltage: 1-5 V dc
Note that the lower value represents the zero percent (0%) and the upper value represents one hundred percent (100%) of the full scale (F.S.)
* based on ISA and IEC standards