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

Extensometers Use Reed Switches for Depth Checks

Reed switches in extensometers

Deep excavations preceding construction projects require careful monitoring to ensure safety. Settlement depths must be observed before construction begins, necessitating the use of magnetic extensometers.

Magnetic extensometers, equipped with Reed Switches, are instrumental in monitoring settlement and heave in various construction contexts, including foundations, excavations, dams, embankments, and tunnels. These devices provide crucial data indicating the depth at which settlements occur, aiding in preemptive safety measures.

The extensometers are used by inserting access pipes into the ground, with magnets strategically placed at fixed intervals along the pipes. These magnets move with any settlement, providing a reference for measurement. Reed switch probes, attached to measuring tapes, are then inserted from above. As the probe nears each magnet at the pipe junctions, it triggers the Reed Switch, indicating settlement.

By reading the depth marked on the measuring tape each time the Reed Switch in extensometers are triggered, construction professionals can accurately gauge settlement depths. This data informs decisions regarding the stability and integrity of the excavation site, allowing for timely adjustments or reinforcements if necessary.

The use of Reed Switches in magnetic extensometers enhances the reliability and precision of settlement monitoring. Their ability to trigger with proximity to magnets ensures accurate detection of settlement points along the access pipes. This method provides valuable insights into ground behavior, contributing to safer and more efficient construction practices.

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 ->

Jun 20, 2024

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-228, M8 Threaded Cylindrical Sensor

M8 threaded cylindrical sensor MS-228 M8 Threaded Sensor Drawing starFeatures30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading ->

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HW-5052 Reed Switch for High Wattages

Reed Switch for High Wattage switching This HW-5052 High Wattage Reed Switch is physically robust and can switch up to 120W. The two types of contact ratings available cover a Continue reading ->

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