The scanner from digital systems is a microprocessor based unit designed to display temperature of more than one point in a process. The indicator, through a program, scans the temperature of each point and displays it. Option can be given to select either a common display with channel/zone. Control action can be provided as programmed. Various options such as printer interface, pc interface can be provided as required. Temperature setting can be done either by keypad or by a set of thumbwheel switches. The entire unit is housed in a suitable din standard cabinet.