Operates automatically without operator intervention or external power, detecting high temperatures or direct flames using a modified polyamide (PA) hose (approx. 18 mm diameter) that activates at 70°C – 100°C (± 3°C), depending on the ProSafe device type.

When a fire or critical temperature is detected, the pressure tube melts at the hottest point, releasing the extinguishing agent HFC227ea (heptafluoropropane) directly into the fire. This agent cools the combustible material and disrupts the combustion reaction. It is non-toxic, non-poisonous, and free from carcinogenic or mutagenic effects.