Security longevity and low cost electric heater belongs to technical field of electric heater. This invention puts forward a new method to realize sheathed heating tube security longevity and low cost, can solve the high cost of electric heater process trival, use the time is short and there are some problem such as security hidden danger. This product is the main points of the direct electric heating element for sintering in the insulation body, achieve fundamentally eliminate the safety hidden danger, simplify the process, reduce cost and prolong service life, the purpose of the example proved that more than half of the cost reduction, prolong service life.

1. Security longevity and low cost electric heater, its characteristic is that the electric heating element and sintering in its external insulation materials, electric heating element external power supply wire.
2. According to claim 1 security ? longevity