Reed sensors and Magnet sensors in Commercial Coffee Machines

Commercial coffee and tea vending machines are built with durability in mind as the number of cups served per day could exceed hundreds. When such large volumes of orders are filled, it is important that that accuracy of the dispensed volume of beverage be correct as a small error could result in spillage and wastage of raw materials. The cup count is also used by the Coffee Machine servicing personnel to keep track of raw materials and accounts, to deliver requirements as and when needed.

To dispense the exact quantity of coffee, tea, water or milk, such machines need to measure the volume by filling up an internal reservoir and then use this releasing the contents to fill cups placed below on the grating. This is accomplished by fitting the internal reservoir with a float and a reed switch which senses triggers the tank full signal when the reservoir is filled up to 200 ml or any other set measure.

This signal is then used to trigger other solenoids or pumps which stop the main reservoir output and open the drain valve from the secondary reservoir to dispense the liquid into a cup. Using a narrow and long secondary reservoir ensures that errors in measurement do not exceed 5 ml. The actuating distance of the standard reed switch is highly repeatable and can consistently pour out the exact volume into cups.

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.

R2 Standard size SMD 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-216 Standard size Cylindrical Sensor

MS-216 Magnet Sensor Drawing 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

LV-1925 Reed Switch for Line Voltage switching

The LV-1925 is a Line Voltage Reed Switch is designed for endurance at switching line voltage loads of 230V. Two versions are capable of Continue reading -> Dec 2, 2020