Morton Grove, IL: TCS Series spacer incorporates a metal spring that continually forces PCB-mounted light sensors into contact with the cover. Easily installed by hand, the spacer mounts over a vertical tab and is available in either nylon 6/6 or flame-retardant nylon 6/6. Various spring forces, mounting styles, and spacer lengths are available by special order. Richco, Inc., (773) 539-4060