Microprocessor based Engineering Unit with Hi & Lo Alarm setpoint with Relay OP & Process Value (PV) Re-transmission. 4~20mA DC with 24V DC Transmitter Supply, All inputs & Range Programmable from Front Panel Switches. Microprocessor based Engineering Unit with Hi & Lo Alarm setpoint with Relay OP & Process Value (PV) Re-transmission. 4~20mA DC with 24V DC Transmitter Supply, All inputs & Range Programmable from Front Panel Switches.