[Show thumbnails] The ABC-16 LED Fault Indicator is specially designed for sling on various cranes. It is equipped with a die cast aluminium enclosure, which houses super bright LED clusters and the control electronics; providing environmental protection, shockproof, high luminance and extended long life. When triggered, it will give an alert alarm and check the operation status of the sling when a problem occurs. It also can be used in electric power stations, railways and metallurgies etc. Customized colours and number of lamps can be implemented based on customer’s special requirement.