Fire safety Emergency Doors Use Magnet Sensors
Fire safety building codes provide standards for the safety, welfare and general health of the personnel occupying the buildings. This includes standards for structural integrity which include water supply, lighting and sanitation, and also for fire safety, prevention and control.
Fire safety norms state that all fire safety and emergency doors be monitored electrically to ensure that they are not being used at times other than during an actual fire, when the main fire alarm has been triggered.
Normally mechanical switches are used, but as fire safety emergency doors remain closed for many years sometimes, they tend not to operate as their mechanical reliability is suspect.
This is where Magnet Sensors help because even though the reed switch inside stays in a closed state for many years, the spring back forces are so good that it opens instantly, when the fire safety door is opened. This sort of system works for Aluminium doors, but if the doors are made of a Ferromagnetic material, special Steel sensors which can detect Ferromagnetic materials work well. Even in this case, the reed switch inside works on the same principle using the embedded magnet, that even if actuated after many years, functions as expected.
Application Classification
Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.
Magnet Biasing Type
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Some special field applications, for the sake of circuit logic, security concerns, or a power saving necessity, require a sensing signal
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Nov 17, 2024 |
Recommended Products
The Reed Switches and Sensors used in such fire safety applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.
Standard Flat Pack Magnet Sensor, MS-328
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starFeatures10W Contact Rating. Normally 30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium
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Sep 28, 2024 |
Line Voltage switching Reed Switch, LV-1925
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Full Length LeadsCropped LeadsSMD Formed LeadsVertical MountingHorizontal Mounting starFeaturesContact Rating Configurable. Ruthenium
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Dec 2, 2024 |
High Wattage Reed Switch, HW-5052
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HW-5052 High Wattage Reed Switch with Full Length LeadsHW-5052 Reed Switch with Cropped Leads starFeaturesContact Rating
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Sep 3, 2024 |