What is PTC?
From Wikipedia:
A PTC (Positive temperature coefficient of resistance) refers to materials that experience an increase in electrical resistance when their temperature is raised.
Materials which have useful engineering applications usually show a relatively rapid increase with temperature, i.e. a higher coefficient. The higher the coefficient, the greater an increase in electrical resistance for a given temperature increase. A PTC material can be designed to reach a maximum temperature for a given input voltage, since at some point any further increase in temperature would be met with greater electrical resistance.
Unlike linear resistance heating or NTC materials, PTC materials are inherently self-limiting.
PTC Heater in our instruments
Custom semiconductor material
The chosen PTC semiconductor material has the critical temperature of 250 0C, which perfectly matches the character of PTFE.
Self-regulating heating
Due to the inherent character, even if the temperature controller malfunctions, the PTC heater will not exceed its temperature limit.
No visible flame
No visible flame while heating with PTC material (traditional coil heating will have visible flame). No safety hazard in the lab.