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

Thermal sensors in Temperature control in deep freezers, coolers

Reed switches in deep freezers
Deep Freezer Door

Thermal Reed Switches are used in Deep Freezers and in a wide range of temperature control applications, either to take certain action like switching on a cooling circuits or to trigger alarms. Due to their clear on and off signal and high reliability, they are used in place of bimetallic strips, thermistors and thermostats for over-heat protection or precise temperature switching. 

In deep freezers, coolers and heaters, the temperature needs to be maintained within a precise window. Thermal reed sensors can be designed having windows as small as 2°C up to 10°C, and can switch up to 60W directly. The sensor can control the switching on and switching off points of compressors in deep freezers and fans in coolers. Thermal reed switches can also be used in aquariums by switching heaters in the water to keep the temperature exactly between 25°C and 30°C.

Standard Magnet Senors are also used in Deep freezers to check if the door has been left open based on a simple timer circuit and can also help count the number of times the deep freezer is being opened. This is especially useful in shops.

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 make the best of product usage.

Temperature Sensing Type

Reed switches in deep freezers Due to their sharp cut in, cut out bandwidth and high reliability, thermal reed...Continue reading ->

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.

TRS-W Thermal Reed Sensor

Thermal Reed Sensor Normally Closed, cut-out temperatures available from 20°C to 150°C, differential of 10°C max, 10W...Continue reading ->