Pressure Indicator : Accepts 4-20mA from pressure transmitter & displays pressure. Pressure Controller : Accepts 4-20mA from pressure transmitter, displays pressure and gives a relay o/p.   Specifications   4 3-1/2" Digit LED Display 4 I/P 4-20 mA 4 Works on 230V AC Mains 4 Generates 24V DC supply 4 Displays pressure upto 1000 bar 4 Single relay or Double relay o/p (Controller Only)