CUTLER HAMMER D40RBA 1 NO 1 NC, HERMETICALLY Sealed, 120 VAC Coil, NO Contacts, Reed, 50-400 HZ, Relay, Type R, Discontinued by Manufacturer: Amazon.com: Industrial & Scientific
Amazon.com: 2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light : Electronics