Anti-corrosion temperature sensor

Abstract

The invention provides an anti-corrosion temperature sensor, including a body and a plug which are mutually connected. The body is composed of a protection shell and a thermistor. The thermistor is positioned in the protection shell, and the plug is led out through a lead. The protection shell comprises a stainless steel layer, a graphite layer, an active metal layer and a heat-conducting insulation material layer from outside to inside, wherein the active metal layer refers to metal which is more active than stainless steel. With the adoption of the protection shell structure, the active metal layer is enabled to have a chemical or electrochemical reaction first as electrons of the stainless steel layer are conducted to a magnesium thin sheet layer due to corrosion, thereby reducing the corrosion resistance of the stainless steel layer, and meanwhile, the oxidized active metal layer cannot affect the thermal conductivity of the whole temperature sensor. The invention is simple and reasonable in structure.

Description

technical field [0001] The invention relates to a temperature sensor, in particular to a corrosion-resistant temperature sensor. Background technique [0002] A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two types: thermal resistance and thermocouple. [0003] At present, ordinary liquid temperature sensors are packaged in stainless steel or copper, with a plug-type shape, which is characterized by easy installation and strong corrosion resistance. Ordinary liquid temperature sensors are packaged with metal materials, and the isolation level from the outer surface of the package to the thermal eleme...

AI Technical Summary

Problems solved by technology

Since the temperature measurement environment is an acid and alkali environment, the temperature sensor is corroded in an acid and alkali environment, and the protective shell will rust and pollute the test environment. At the same time, the replacement of the protective shell becomes more frequent, which is not conducive to long-term temperature observation

The traditional protective shell is stainless steel, but in some extreme environments, stainless steel will quickly rust and need to be replaced, which is very inconvenient to use; the structure is complex and the design is unreasonable

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