Murrelektronik MAK 12.4 Voltage Comparrator. MurrElektronik MAK 12.4 series voltage comparrator is designed for evaluating analog voltages, generated by pressure, temperature or other sensors. The analog input values are compared to internal or external reference voltages to over or underflow. Outputs will be switched, dependent on defined limits. Features and Benefits. Status LED. Compact design. 3 transistor outputs. 2 separate measuring channels. DIP switch configuration. 35mm DIN Rail mounting