Comparison : Item # 18-LPI, Loop Powered Indicator
3½ Digit LCD
Item # 18-LPI-1V, Loop Powered Indicator
3½ Digit LCD, <1 Volt Drop
Item # 18-LPI-SR, Loop Powered Indicator
3½ Digit LCD, Square Root
Item # 18-LPI-4, Loop Powered Indicator
4½ Digit LCD
Item # 18-LPIX, Loop Powered Indicator
3½ Digit LCD