Profile: SG Process Control Instruments offers position transmitters for process industries, such as power plants, water treatment plants, iron & steel factories, cement factories and pharmaceuticals. Our SG4-20LA position transmitter is a two wire electronic transmitter, that converts resistance input into current output. When coupled with any rotary/reciprocating device, the transmitter picks up the travel of the rotary/reciprocating device and provides feedback of rotary or linear displacement via a 4-20 mA signal.