The R 3W SR is a SafeSide™ thru door voltage indicator provides electrical safety information while the panel doors are safely closed. This one size fits all solution detects 3 phase AC or DC voltage from 40 to 750 VAC/30 to 1000 VDC. The encapsulated construction and redundant circuit design means rugged reliability. It is available with non flashing LEDs. It is suitable for high energy panels and frequently accessed panels. Redundant circuitry/long life LED's. Potted construction with 6' leads. Phase insensitive. High surge immunity. Applications are automation and process control.