Closed Loop Open Loop SPDT DPDT Switching Voltage: Switching Current: Watts (Max.) (Volt x Amps): 100 Volts .5 Amps 7.5 Watts 30 Volts .25 Amps 3 Watts 30 Volts .25 Amps 3 Watts 30 Volts .25 Amps 3 Watts •  Closed Loop = When a magnet is in close proximity to the switch the switch is closed. • Open Loop = When a magnet is in close proximity to the switch, the switch is open. • SPDT = This switch has a common, closed & open side. • DPDT = This switch has two SPDT reeds in the same switch housing, each having it's own common, closed, and open side. • Dual Single Pole Single Throw = Two closed loop reeds in one switch housing. Nascom only specifies the most sensitive reeds, which will provide for it's customer the most Gap distance between the switch and magnet without modification. Biasing a reed to obtain extra gap distance can lead to false alarms and reed failure. Nascom will not bias a reed even upon request.