A trough collector for solar energy, with multiple parallel troughs preferably being contained within a single unit. The spat includes a boot portion having a back opening and a front end, and a sleeve connected to the boot portion. The first external power-on voltage detector has a first voltage threshold, receives a first external voltage, and generates a first control signal when the first external voltage is higher than the first voltage threshold. The lower portion acts as a supports and supports the upper portion which includes a horizontal bar member. Examples are end effectors suitable for picking up semiconductor wafers and packaging material from a pod or some other carrier. The metal shell includes a first metal shell, a second metal shell, and a third metal shell cooperated to seal gaps between the insulative housing and the cable.