The solid-state display devices are designed and tested for use in adverse industrial environments. The character height is 7.4mm (0.29 inch). The numeric and hexadecimal devices incorporate an on-board IC that contains the data memory, decoder and display driver functions. The numeric devices decode positive BCD logic into characters "0 to 9", a "–"sign, decimal point, and a test pattern. The hexa­deci­mal devices decode positive BCD logic into 16 characters, "0-9, A-F". An input is provided on the hexadecimal devices to blank the display (all LEDs off) without losing the contents of the memory. The over range device displays "+/-1" and right hand decimal point and is typically driven via external switching transistors.