High-temperature physical property tester principle
Release time:
2022-07-20
High-temperature physical property tester It is a type of temperature measuring instrument. Depending on the actual temperature measuring technology and materials, and the different temperature measuring ranges, there are kerosene thermometers, alcohol thermometers, gas thermometers, resistance thermometers, thermocouple thermometers, radiation electronic thermometers, optical thermometers, bimetallic thermometers, etc.
High-temperature physical property test instrument
Temperature is a parameter that characterizes the degree of hot and cold of an object, and cannot be obtained by direct comparison like mass and length. It can only be measured through other physical properties related to temperature, such as the volume, density, viscosity, hardness, and conductivity of the object.
Thermal resistance thermometer
The principle of a thermistor is to utilize the characteristic that the resistance of different conductors or semiconductors changes with temperature. The main advantages of thermistors are: high measurement accuracy, good reproducibility; a wide measurement range, especially at low temperatures; easy to use for automatic measurement, and convenient for remote measurement. Similarly, thermistors also have defects in high-temperature (greater than 850℃) measurement, with poor accuracy; they are easily oxidized and corrosion-resistant.
Thermometer
Currently, the materials used for thermistors mainly include platinum, copper, and nickel. The use of these materials is mainly because the ratio of temperature to resistance in the common temperature range is a linear relationship. Here, we mainly introduce platinum resistance thermometers.
Platinum is a precious metal. Its physical and chemical properties are relatively stable, especially its strong oxidation resistance. It is easily purified, has good processability, and can be made into very fine platinum. Compared with copper and nickel, it has high resistivity, high reproducibility, and is an ideal heat-resistant material. The disadvantages are that the resistance coefficient is small, it is brittle when working in a reducing medium, and the price is relatively expensive.
The thermistors used in the field are generally armored thermistors, which consist of a thermistor body, insulating material, and a protective tube. The thermistor body is welded to the protective tube, and the insulating material is filled in the middle to provide good protection for the thermistor body, making it impact-resistant, shock-resistant, and corrosion-resistant.
High-temperature physical property tester technical parameters
Temperature measurement principle: Thermistor method (10Kω25℃), measurement range -6℃～+46℃, resolution 0.1℃, accuracy ±0.3℃±1min.
Dissolved oxygen (% air saturation): Measurement principle and steady-state polarographic method (PE film); Measurement range 0~200%; Resolution 0.1% air saturation; Accuracy is ±2% or ±2% air relative saturation, whichever is greater.
Dissolved oxygen (mg/L): Measurement principle steady-state polarographic method (PE coating), measurement range 0～20ppm (mg/L); Resolution 0.01PPM (mg/l); Accuracy reading ±2% or ±0.2mg/l, whichever is greater.
Features of high-temperature physical property tester
1. The instrument housing is waterproof, using IP65 waterproof design.
2. Stainless steel probe, with an additional plastic protective cover, sturdy and durable, easier to sink into the water.
3. The cable interface has a stress reliever to reduce fatigue at the wiring point and effectively extend the cable life.
4. The cable has two specifications: 4m and 10m.
5. Uses a new generation of fast response/low stirring dependence PE coating.
6. Automatic temperature compensation, manual temperature compensation, manual air pressure compensation.
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Luoyang Turner High Temperature Instrument Co., Ltd.
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