The switches can be used in numerous security applications where you need to isolate input from two different pieces of equipment that require a signal from the same source. The GRI "Combo" series switches are dual function reed contacts that monitor two separate functions. By combining two reeds in one package, either two "A" forms or one "C" form, GRI offers the installer savings in labor cost along with a wide choice of switch designs for multiple applications. Other configurations including wide gaps are available. Please contact that factory for further information.