Honeywell 945T

Mini Surface Mount Magnetic Contact with Screw Terminals

Honeywell 945t wh mini surface mount magnetic contact with screw

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The Honeywell 945T is a mini surface mounted magnetic contact that has screw terminals. The 945T consists of two pieces, a magnetic conta...
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Description

The Honeywell 945T is a mini surface mounted magnetic contact that has screw terminals. The 945T consists of two pieces, a magnetic contact, and a magnet, which are approximately the same size and shape. The 945T is approximately 2” long, and 1/3” in width and height.

The 945T is ideal for protecting both doors and windows when used with any hardwired security system. The 945T is intended for use with Honeywell’s wired alarm control panels including the VISTA series. The contact portion of the 945T should be mounted to the door frame or window frame, and the magnet side should be mounted to the door or window, with no more than 1.125” gap between them. A magnetic contact contains a reed switch, which completes a circuit when the magnet remains close to the contact. When the door or window is opened, the magnet will move away from the contact, causing the circuit to break, and that zone on your alarm system to activate.

The Honeywell 945T can be mounted with screws, or included adhesive strips. The convenient screw terminals allow you to connect the wires from your security system without splicing or soldering. The 945T contact replaces part numbers including: Sentrol 1038T, GRI100T,1100T, Tane-60, and Aleph DC-2531.

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Technically the 1.125” magnet spacing gap refers to any direction including the depth plane. However I find that these contacts work best when they are on the same plane. You can certainly do some testing but a small spacer or some thicker foam adhesive tape behind the smaller device is recommended.
Does the reed switch and the magnet have to be on the same depth plane to work, or can the 1" gap be in any direction? For my sliding glass door, the frame where the contact is places the back of the contact about 3/4" closer into the room then where the back of the magnet is with the door closed. Or do you have to put spacers behind the magnet to have it line up flush with the contact switch?
Unfortunately, Honeywell no longer makes the 945T in brown.
I don't see a way to select the other colors, such as brown on the website. I see that 945T-BR is brown, but no option to select that.
Yes, they do come with double sided tape or you can screw them in to the frame/window.
Do these sensors have an adhesive back for mounting? If not what do recommend for mounting on vinyl windows?
No the magnet just needs to aligned with the sensor which has the reed switch inside. There is no polarity based on the direction of the magnet.
Does the magnet need to be installed in a certain direction or does it not matter? I notice that each piece has a marking of "UL" and on the other side it has "ULC". Does the magnet and reed switch need to match the same markings on one side when installed on a window or will it work in either direction? Im asking because I installed all my contacts but later thought that there might be a polarity issue if the magnet was upside down.
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