(Relays and Relay Accessories)
From this Article:
A relay may meet with a variety of ambient conditions during actual usage. In order to avoid unexpected failure in result, testing over practical range under actual operating condition is required.... (View Full Article)
(Magnets)
From this Article:
A reed switch is the heart of a magnetic contact. It is nothing more than a simple switch that turns on and off with a magnet.... (View Full Article)