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With the emergence and development of temperature sensor technology, more and more industries apply temperature transducers to improve the level of automation, and even the mechatronics control. The application of temperature transducers in the food industry not only improves food production, but also guarantees food safety.
In the past, the temperature and time control of the wok in the condiment workshop was controlled by manual experience. The accuracy of manual temperature measurement and time control is not high, and the quality of the fried condiments is uneven without a uniform standard, which affects the quality of the product. In view of the above problems, a loop composed of temperature transducers and meters can be selected to achieve the purpose of improving accurate temperature measurement and alarming. The most widely used temperature transducer types of materials in the food industry are platinum and copper: platinum resistance has high precision, and is suitable for neutral and oxidizing media with good stability and a certain non-linearity. The higher the temperature is, the smaller the resistance change rate will be; in the temperature measurement range, the copper resistance value and the temperature are in a linear relationship, and the number of temperature lines is large. Temperature sensor technology is suitable for non-corrosive media, and it is easy to be oxidized when it exceeds 150 degrees.
Valves are used everywhere in the food industry to cut off, monitor and control. They are the decisive components for safety, accuracy and reliability in the factory. In order to accomplish this task reliably, the insertion temperature sensor transmits the current valve position controller or process control system through a common interface.
Usually, magnetic or inductive proximity temperature measuring transducers perform this task, and they eventually stop signals, such as "regular open" or "regular closed" as a kind of switch control switching information. However, the detection of the middle position of the valve position is increasing. It allows the detection of continuous valve detection for the lifting valve stem valve cleaning cycle and the unexpected operating state of the upper computer. In modern process visualization, this is the only way to meet the ever-increasing requirements.