Here, the MAX6675 amplifies and reads the data from the thermocouple wire, while the MAX6675 gives the temperature reading over SPI. This reading is then processed by a microcontroller or microcomputer and displayed. The other end of the thermocouple wire is attached to a semiconductor chip that amplifies any small deviation detected in EMF caused due to a temperature change, which is then converted into digital reading and shared over SPI or any other interface. These metal wires are well insulated, which allows them to withstand 1200℃ and above temperatures, and dissipate heat to the environment (see below pic). And because the sensor probe side has two long different metal wires, other electronics parts of the monitoring system can be kept at a safe distance away from such a high temperature. The K-type thermocouple sensor consists of two long metal wires made of chromel (positive end) and alumel (negative end)įor measuring the hot part of a furnace or a metal, attach an end of the K-type thermocouple wire junction to it. Here, you will be using the K-type thermocouple to monitor very high temperatures of heated metals and furnaces whose temperature is around 800℃ to 1200℃ and above. This EMF helps detect micro-changes and converts them into temperature readings. Thermocouple, which uses the Seebeck effect, generates an EMF by heating one end of two different metals joined together.IR radiation sensor, which gives results based on the colour of molten metal.To achieve this, you will be using different sensor types such as:
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To address this problem, today you will be learning how to design a temperature monitoring system for temperatures above 500℃ to 1000℃ present in furnaces and industries. Therefore, a special type of sensors and components are required to do monitoring at extremely high temperatures. However, most temperature sensors and electronic components melt at such high temperatures. High-temperature monitoring and logging are needed in factories and industries that have boilers, furnaces, hot metal works and similar heating jobs. Measuring and monitoring temperature above 200℃ to 1000℃ is a highly difficult task, especially when you want to carry it out digitally because most sensors have a sensing range below 200℃, which does not allow them to tolerate a temperature of around 1000℃.