Magnet Sensors in Door position sensing for Home Appliances

Most home appliances such as Refrigerators, Washing Machines, Dishwashers or Clothes dryers are a requisite these days. And more appliances means the there is more concern for home owners regarding energy wastage and the efficient running of these appliances is important. This has led appliance manufacturers to design better equipment with lower wattage motors or compressors, with more sensors to monitor the various running states of these appliances so quick action can be taken remain energy efficient.

In Dish washers and Washing machines, the processor needs to know that the door is closed and latched, so that the automatic cycle can be started and water can be pumped into the system. This is to ensure that there is no wastage of water and consequently, power. In Refrigerators and deep freezers, the processor needs to control the lighting inside and also check that the compartments doors are closed to avoid energy wastage. This is done so that the signal is used to trigger an alarm so the food inside does not get warm.

All door sensing in white goods and appliances is accomplished with a reed sensor mounted inside the appliance and a magnet on the door. Special Magnet Sensors withstanding higher shock and vibration can be used.

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.

Position sensing Type

Position Sensing type application When an application requires the end position of a movement sensed, or the sensing of a part when it Continue reading -> Nov 7, 2020

Recommended Products

The Reed Switches and Sensors used in such 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.

MS-214 Miniature Cylindrical Sensor

Drawing of MS-214 Magnet Sensor starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Oct 30, 2020

MS-216-L Cylindrical Sensor for Line Voltages

Drawing of MS-216-L Magnet Sensor starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Oct 30, 2020

MS-225, M5 Threaded Cylindrical Sensor

MS-225 Threaded Magnet Sensor drawing starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Continue reading -> Nov 20, 2020

MS-328 Flat Pack Reed Sensors with Actuator

starFeatures10W Contact Rating. Normally 30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Oct 30, 2020