K -type thermocouple temperature sensor: K type (chromium nickel aluminum alloy) is the most commonly used general thermocouple temperature sensor.
 
It is low in price and has a variety of probes, with a temperature range between -200 ° C and 1350 ° C. Chrome nickel alloys are made of nickel chromium alloy. Velian thermocouple is based on nickel and aluminum, but usually contains a small amount of manganese and silicon.
 
The K -type thermocouple is used to measure many different types of environments, such as water, mild chemical solution, gas and dry areas. They can be engines, oil heater and boilers. They are also used as thermometer for hospitals and food industries.
 
The K type is the most popular thermocouple temperature sensor. Like all thermocouples, they have some disadvantages: carefully calibrated before use. Their output signals are very small, and they may have noise. They are also prone to stress, strain and corrosion, especially as they grow. However, type K is specially related to their use.
 
The K -type thermocouple temperature sensor is generally used when the temperature exceeds 540 ° C. In order to reduce excessive errors, it is recommended to use in oxidation or a complete inert atmosphere at -200 to 1260 ° C.
 
The K -type thermocouple temperature sensor is stable only in a short time at a certain temperature, and then they tend to drift in the direction in the right direction. The size of the drift depends on the temperature. For example, in 1093 degrees Celsius, their reading may be offset 5 degrees. A alternative or periodic irradiation of alternate or cyclical irradiation below 371 degrees Celsius and 760 degrees Celsius produces unstable measurement results. It will accelerate aging in an environment that is exposed in 427-649 degrees Celsius.
 
One of the metal of chromium nickel thermocouple is magnetic. One feature of the thermocouples made of magnetic materials is that when the magnetic material reaches its residential point (K -type thermocouple is about 354 ° C), the output of the thermocouple has a step jump. Chromium nickel is subject to the so -called "green corrosion". This situation occurs in a low oxygen environment of 815-1040 degrees Celsius. This exhaustive oxygen environment is called restoration, and the K -type thermocouple temperature sensor should not be used to restore or circulate oxidation and restore the atmosphere. In addition, they should not be used in a sulfur -containing environment because they become fragile and rapidly breaking. The presence of chromium makes them not suitable for vacuum, unless time is short. This is because vaporization may occur.