Heating tube resistance how much normal

　　Heating tubes are a commonly used heating element,mainly used to heat objects such as liquids,gases or solids.The resistance of the heating tube is related to its heating power and material,under normal circumstances,its resistance is usually between a few hundred ohms to a few thousand ohms.Below,I will introduce the normal range of resistance of the heating element and the factors affecting its resistance.

　　1.Normal range of heating tube resistance:

　　Heating tube resistance size is determined by its cross-sectional area,length and resistivity and other factors.Under normal circumstances,the resistance range of different power and material of the heating element will vary,but in general,its resistance value should be between a few hundred ohms to a few thousand ohms.

　　2.Factors affecting the resistance of the heating element:

　　The main factors affecting the resistance of the heating tube include the following:

　　-Material of the heating tube:the material of the heating tube is an important factor affecting its resistance,different materials have different resistivity.Generally speaking,the resistance of the heating tube with the material resistivity becomes larger and larger.

　　The length and cross-sectional area of the heating tube:the length and cross-sectional area of the heating tube is also an important factor affecting the size of its resistance.Generally speaking,the resistance of the heating tube with the length of the larger and larger,with the cross-sectional area of the larger and smaller.

　　-The working temperature of the heating tube:the temperature at which the heating tube works will also have an impact on the size of its resistance.Generally,the resistance of the heating tube decreases as the temperature increases.

　　-Loss or aging degree of the heating tube:the heating tube is used for a long time or under too high power conditions,which will lead to the damage of the internal structure of the heating tube,and the resistance of the heating tube will become larger,and even lead to the heating tube can not work properly.

　　3.How to detect the resistance of the heating tube:

　　In order to detect whether the resistance of the heating tube is normal,you can use a multimeter to test.The specific method is as follows:

　　-Turn off the power supply of the heating tube and wait for the heating tube to cool down to room temperature.

　　-Use the multimeter to set it to the ohm gear,and connect the two electrodes to the two ends of the heating tube respectively.It should be noted that each joint point should be in full contact to avoid measurement errors.

　　-Read the resistance value of the multimeter and compare it with the nominal resistance value of the heating tube of the model.If the resistance value differs significantly from the nominal value,the heater tube may need to be replaced.

　　In summary,the normal range of heating tube resistance is usually between a few hundred ohms and a few thousand ohms.The main factors affecting the size of the resistance of the heating tube include material,length,cross-sectional area,operating temperature,as well as the degree of loss and aging.In order to ensure the normal operation of the heater,you can use a multimeter for resistance testing and timely replacement of the problematic heater.