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Flush Magnetic Contact/Reed Switch

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Quoting product code: FK77J

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About this product

Overview

Product overview

• A magnet and reed switch sensor that can be used to protect doors and windows
• Recessed into doors or windows and their frames for a flush finish providing a discreet magnetic switch with an operating gap of 15mm
• Five terminal contacts

What is this flush contact used for?
This flush contact, which comes with a magnet and reed switch, is great for protecting your wooden doors and windows discreetly. Once connected to a security system, when the distance between the reed switch and magnet exceeds 15mm the alarm will sound.

How does this flush contact protect my home?
When wired up to a security system a circuit is formed when both the magnet and reed switch are in the presence of each other (or within 13mm of each other). Once an intruder opens the protected door/window, this circuit is broken and the alarm will sound. Since this flush contact makes a circuit with the security system, if someone were to cut the wire connection the alarm would still sound, adding to the overall security.

Where is the ideal place to install this?
The distance between the magnet and reed switch has to be greater than 15mm before the alarm does go off. This means that it is best to locate this contact on doors or windows where the gap between the frame and the door/window is not too far apart or won’t get too much disturbance.

What will I need to get this connected to the security system?
Since this is a flush contact, a recess does need to be made in the door/window that it is to be fixed to. Then in order to connect this to your security system an alarm cable is needed (e.g. Order Code: XR89W). The five screws at the bottom of the reed switch are used to wire it up to the control panel, where three of the screws will be used to make security loops (brass in colour) and two will be used to connect to the reed (silver in colour), establishing an alarm loop.

Specification

Specification table
Operating gap 13 to 15 mm
Terminal type 5 screws
Mounting type Flush
Switch configuration Normally Closed
Dimensions
Dimensions - Reed Switch 36 mm x 22 mm x 1.75 mm
Dimensions - Magnet 36 mm x 22 mm x 1.75 mm
Dimensions - Recess 13.5 mm x 20 mm (dia)
Power
Voltage range (DC) 1 to 100V
Maximum current (DC) 500 mA
Voltage range (AC) 1 to 125V
Maximum current (AC) 500 mA
General
Material High Impact Polystyrene
Weight 18 g
Package contents
Flush reed switch and magnet
Fixing screws

I have a faulty switch, similar in size to this on my front door as part of the home security system (Veritas R8) is this an appropriate replacement and how difficult is it to connect? I'm hoping that with care I can remove the old one and connect this

Asked by: Jack
Unfortunately we are unable to guarantee full compatibility for this item in your intended application, as this is not the manner for which it was designed to be used.
Answered by: Russell
Date published: 2017-08-19

Is this switch normally closed away from magnet

Asked by: George
Switch configuration Normally Closed
Answered by: Dominic
Date published: 2016-12-01

Hi, Is the unit Normally closed when magnetized or demagnetized please?

Asked by: Craig
How does this flush contact protect my home? When wired up to a security system a circuit is formed when both the magnet and reed switch are in the presence of each other (or within 13mm of each other). Once an intruder opens the protected door/window, this circuit is broken and the alarm will sound.
Answered by: Les
Date published: 2017-05-02

Can this be used outside on a garden gate? Does it work on low voltage DC?

Asked by: JimN
I am pleased to advise the product you mentioned will do exactly what you require.
Answered by: Dominic
Date published: 2015-07-17

who is the manufacturer of this unit please
Asked by: David Robinson
KNIGHT PLASTICS LTD
Answered by: DM
Date published: 2015-07-17
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