Profile: Product Innovation Ltd. is a new product development consultancy specializes in inventing and developing new products for manufacturing companies. We research the temperature approach and identified a time / temperature signature, designed the electronics, developed and wrote the software, designed the housing, filed patent applications & design registrations. We provide tilt switch in response to the increasing need to replace mercury in similar types of products. It works on a very simple basis of light from an LED being directed through a small hole at the apex of an inverted cone. A small ball rests in the apex of the cone, obstructing the light from the LED. When the switch is tilted more than the angle of the cone the ball moves and the light from the LED reaches a light sensitive receiver, which then turns on.