Radix microsystems manufactures loop powered lcd indicators [model plc-40], which are 4-digit programmable instruments. These indicators accept 4-20 ma current and display as a user-scalable process variable in the range of -19999 to 19999, on a 4" [10 mm], 4%-digit lcd display. They work off the 4-20 ma loop current and do not need any other power supply. The loop drop is less than 5 v. These micro controller-based indicators have user-programmable zero/span, decimal point and linear or square root mode. The lcd indicators are available in ip65 field. Mount plastic enclosure and come in 48 mm x 96 mm x 115 mm panel mount din enclosures they are also available in flameproof enclosures.