For a high traffic area or one that has heavy things moving around the metal housing of this honeywell version is far.
													
																	Garage door security contacts. 
									
	
		
	
																	A garage door alarm contact is a magnetic switch used to connect a roll up or overhead garage door to a home security system. 
																	Seco larm sm 226lq overhead door magnetic contact 2 3 4 70mm gap closed loop adjustable to fit most door channel widths magnet enclosed in gray abs case on l bracket 12 24 vdc 4 6 out of 5 stars 27. 
																	8 overhead door contact 1000 37sz 1000 50sz. 
																	2 pack overhead door floor garage shutter contact sensor security alarm switch 3 9 out of 5 stars 6. 
															
													
									
	
		
	
																	It consists of a switch and a magnet just like any standard door or window contact used for an alarm system. 
																	Get it as soon as sat sep 19. 
																	Only 5 left in stock order soon. 
																	Window door alarm wireless door sensor chime 1000ft range 36 chimes 1 receiver and 1 magnetic door entry alert security contact sensor burglar alert ideal for home garage apartment and office 4 1 out of 5 stars 825. 
															
													
									
	
		
	
																	Connecting a garage door contact to a home alarm system. 
																	Clamp on ohd magnetic contact series. 
																	The biggest difference is that an overhead door contact is built into a rugged housing to handle the vibration. 
																	4 overhead door magnetic contact series 1000 50sg 1000 73sg. 
															
													
									
	
		
	
																	There is another similar garage door contact switch that is cheaper but the switch housing part is made of plastic. 
																	3 8 out of 5 stars 2.