How to know the power of the electric heating tube?

Some electric heating tubes are not marked when they leave the factory, or the marked voltage and power cannot be seen for a long time. How to quickly know the power of the electric heating tube?

 

Here to use a more commonly used measurement tool, resistance meter. We can know the power of the electric heating tube by measuring the resistance value.

 

For electric heating tubes with two terminals, such as cartridge heaters and U-shaped electric heating tubes, the power of the cartridge heater can be obtained by the known voltage according to the formula: power = voltage * voltage / resistance value.

 

So how to quickly know the power of the electric heating tube? You can first measure the resistance value of the electric heating tube, and then find the corresponding electric heating tube power according to the different wiring methods.