“Heat flow measurement can provide some very important and detailed data that cannot be obtained by temperature measurement alone. Heat flow sensors are now more and more widely used in research in all walks of life. It is widely used not only in the fields of construction and energy saving, but also in the fields of fire protection and heat preservation. For example, the heat flow sensor is used to study the heat preservation effect of surgical clothing materials.
Heat flow measurement can provide some very important and detailed data that cannot be obtained by temperature measurement alone. Heat flow sensors are now more and more widely used in research in all walks of life. It is widely used not only in the fields of construction and energy saving, but also in the fields of fire protection and heat preservation. For example, the heat flow sensor is used to study the heat preservation effect of surgical clothing materials.
First of all, the heat flow sensor is divided into contact type and non-contact type. Contact heat flow sensors measure conductive heat flow, convection heat flow, and radiant heat flow; non-contact heat flow sensors mainly measure radiant heat flow and convective heat flow.
1. The contact heat flow sensor should be attached to or buried in the object under test, such as building material heat flow measurement, pipe heat flow measurement, boiler heat flow measurement, skin heat flow measurement, etc.
The choice of this type of heat flow sensor mainly depends on the application, determining the measurement temperature and the size of the sensor.
For example: miniature sensors are mainly used in biomedicine, physiology, animal heat loss, power plants, etc.
The disc heat flow sensor has a diameter of 25.4mm and is mainly used in anesthesiology, hypothermia, life sciences, general research, etc.
The disc heat flow sensor has a diameter of 19mm and is mainly used for clothing and protective clothing research, hypothermia research, sports research, life sciences, etc.
The high-precision high-temperature heat flow sensor is made of ceramic high-temperature materials and equipped with a stainless steel housing. It can accurately measure, record and control the heat flow in extreme environments (for example, kiln walls, furnace tubes, nuclear power generators, etc.).
2. There is a certain distance between the non-contact heat flow sensor and the measured object to measure radiant heat flow and convective heat flow; this is generally divided into total heat flow sensor and radiant heat flow sensor. The total heat flow sensor includes radiant heat flow and convective heat flow; the radiant heat flow sensor only measures the radiant heat flow. Generally, a window is installed in the total heat flow sensor to shield the convective heat flow.
From the production principle, this kind of heat flow sensor is divided into Gardon heat flow sensor and Schmidt Boelter sensor (plug heat flow sensor).
Non-contact heat flow sensors are widely used in ground and flight aviation tests, fire tests, flammability tests, heat flow standards, heat transfer research, material development, and furnace development.
Finally, the editor of Gongcai.com recommends two imported heat flow sensors to everyone, that is, the heat flow sensor-MF180 and heat flow sensor-MF180M imported from abroad by the famous sensor online shopping mall-MF180M, two outstanding heat flow sensors. These two heat flow sensors are suitable for direct measurement of the heat flow inside the material, and also suitable for the measurement of the radiation flow of the refrigerant. Test principle There are three heat conduction modes: heat conduction, heat radiation and heat flow. If the heat flow sensor is placed on the surface of the material, it will test the sum of the three modes of heat. If the sensor is placed inside the material, it directly measures the heat transfer generated by heat conduction. Using thermocouples to test the temperature difference, the heat flow passing through can be directly measured.