The heating element of thick film heater is mainly composed of stainless steel tube substrate, inner insulating medium layer, resistance heating layer and outer insulating medium layer from the inside to the outside. For tubular thick film heater, water flows through the stainless steel tube, and the thickness of inner insulating medium layer is about 100 μ M. due to the short heat conduction distance from resistance heating layer to stainless steel substrate, the thermal resistance is very small, The thermal response is fast. Among them, the application advantages are the thick film heating tube, barrel structure, water channel, 360 degree integral channel heating, the overall heating is more uniform, and the heating efficiency will not be reduced due to a large number of bubbles on the surface of the heater. Because the heat can be transmitted in time, the surface temperature of the whole heating pipe is not high, and the open fire will not be caused. Good safety and long service life. For the plate-shaped thick film heater, because it is in close contact with the heated object, the heat can also be transferred out in time. The thick film heater produced by Jaye has high power density, small volume, high pressure bearing, no power attenuation, fast thermal response, not easy to scale, and the heat conversion rate is up to 96%. At present, there are mainly two types of thick film heaters made by Jaye, stainless steel thick film heating plate and stainless steel thick film heating tube.