Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Magnet sensors for Dish Washer spray arm jam detection

Reed switches in dish washer spray arm jam detection
Dishwasher

Dish Washers are appliances used to automatically wash dishes and cutlery, by spraying high pressure hot water and detergent. This is accomplished by rotating spray arms between the shelves and at the bottom of the appliance. As these spray arms rotate and sprays water, the high power water spray could dislocate some of the lighter dishes in the carrier and lodge them along the spray arm path and jam its movement.

As a result, the next time the spray arm passes, it could stop the system. To overcome such problems, any blockage needs to be sensed and displayed on the main panel so that the user can pause the washing cycle, and correct the jam. This is accomplished with Reed Sensors mounted at the end positions of the spray arms and in strategic position along its path. The spray arm, having the magnet will trigger the reed sensors consecutively, within a specific time span which is proportional to its speed. If a jam occurs, and the set time period between two reed sensor points has exceeded, the processor stops the machine and indicates a jam on the panel.

Magnet Sensors can are also used in Dish Washers for door sensing. This signal is used to make sure the door is closed properly before starting a cycle, to avoid water leakage. The same sensor signal is also used to stop the wash cycle is the door is suddenly opened.

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 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

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.

R3 Miniature SMD Reed Sensor
Miniature Reed Sensor These miniature SMD reed sensors are designed for low power, high speed switching applications, and have a cost advantage over the Continue reading ->

Jun 7, 2021

R2 Standard size SMD Reed Sensor
Standard Size Reed Sensor R2-S Gull-wing SMD Formed Reed SensorR2-S Gull-wing SMD Formed Reed Sensor Pad LayoutR2-F Low Profile SMD Formed Reed SensorR2-F Low Continue reading ->

Dec 2, 2020

MS-106 Reduced Miniature PCB Mountable Reed Sensor
Reduced miniature pcb reed sensor Drawing of MS-106 Reed SensorDrawing of MS-106 Reed Sensor Pad Layout starFeatures10W Contact Rating. 15.2 mm PCB Pitch. Normally Continue reading ->

Dec 2, 2020

SM-1322 Sub Miniature Reed Switch
Sub Miniature Reed Switch Size This Form A type SM-1322 Sub Miniature Reed Switch is built with a 2.25 mm diameter glass with a higher wall thickness for better glass to Continue reading ->

Nov 8, 2022