5531B1 LCD Digital Panel Multi-Function Meter, 44.5mm x 91.5mm. PR Electronics 5531 series are loop powered 1/8 DIN LCD panel indicators, designed to give a simple and efficient display in demanding applications. The 5531 indicator is powered by the 4 to 20 mA current loop and is easily scaled to display the correct process value. The front panel offers easy programming with 3 buttons that can be used to scale the display to any range between -9999 to 9999, and reverse display action is possible.