PTC heating film

A benchmark for safety in heating products

The use of the PTC (Positive Temperature Coefficient) heating element has been studied in Hydor laboratories since the early Nineties. It is made up of a special carbon-based ink applied to a plastic film.

In the special ink deposited on the PTC film, the carbon aggregates move away from one another when the design temperature threshold is exceeded.

This phenomenon allows for a dramatic increase in electrical resistance and, consequently, a drop in power, thus guaranteeing the Self-Limiting Factor, i.e. the safe control of the heat given off by the heating element.

A simple example of the most common application might be as follows: during maintenance operations, if an ordinary heater (with a Nickel-Chrome steel resistor) is accidentally extracted from the water in the ON position, there will be an uncontrolled rise in temperature; it will not be possible for the heat produced by the resistor to be removed by the air, and the ordinary glass tube the heating system is contained in will explode.

If a Hydor heater with PTC technology is extracted from the aquarium as described above, the PTC heating element will see to it that the overheating effect is drastically reduced, thus avoiding dangerous explosions and guaranteeing the aquariology enthusiast a safe, reliable product.

This innovative technology - currently unrivalled on the market - significantly boosts safety, and can thus be applied to a wide variety of heating systems.