Im about to have a composite door fitted in a UPVC frame,has any alarm engineers fitted a recessed contact in to a upvc frame as the firm fitting say you can not drill the frame which I find strange as they drill fixings in it.Im not keen on the flush contacts or is there another way of doing it.Any pointers please
Door contact for UPVC frame
- Thread starter jcb208
- Start date
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Normally fit surface on PVC doors this will depend on door design most PVC/composite have a metal strip with the locking action on, you could fit a slim Jim contact in the top of the door depending on door profile.
Not really but a door contact is better for two reasons, you may a panel with chime on it, lots of sneak thiefs around taking car keys, they will be in before the pir picks up. Just had a job where they had a break in, they didn't get the door fully open but they triggered the door contact ,the next door neighbour heard the alarm activate and chased them off!
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Two points
The metal frame in a PVC door frame can divert the magnetic field away from the sensor if the sensor and /or magnet is close to the metal work. This can result in false "door open" events. A more powerful magnet is one solution.
In a wireless system having a PIR that reacts to the door and a contact on the door can result in two sensors transmitting at the same time and thus blocking each other. As result the panel will not be aware the door has been opened.
The metal frame in a PVC door frame can divert the magnetic field away from the sensor if the sensor and /or magnet is close to the metal work. This can result in false "door open" events. A more powerful magnet is one solution.
In a wireless system having a PIR that reacts to the door and a contact on the door can result in two sensors transmitting at the same time and thus blocking each other. As result the panel will not be aware the door has been opened.
I have fitted recessed contacts ( the ones about 20mm with a rectangular plate & 2 screws) to all my new UPC doors, front side and two to the patio doors.
Took some drilling with the metal channel inside the doors & frame but Not had any issues with them at all.
Took some drilling with the metal channel inside the doors & frame but Not had any issues with them at all.
I've done this to both my upvc doors.
Dismantle a normal surface mount contact and carefully solder two very thin wires onto the reed switch. I place this in one of the channels near the bottom of the door frame and drilled at an angle with a narrow drill so the wires appeared behind skirting.
Then get a strong Neodymium magnet and attach it the the door to mate with the reed switch. The magnet inside the surface mount will be too weak.
Cover the reed switch with some white silicone and it becomes invisible.[/i]
Dismantle a normal surface mount contact and carefully solder two very thin wires onto the reed switch. I place this in one of the channels near the bottom of the door frame and drilled at an angle with a narrow drill so the wires appeared behind skirting.
Then get a strong Neodymium magnet and attach it the the door to mate with the reed switch. The magnet inside the surface mount will be too weak.
Cover the reed switch with some white silicone and it becomes invisible.[/i]
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