The Safe-T-Check Porthole is an innovative new idea that allows zero entry air tests to be performed with your own gas monitor, eliminating the need for bulky equipment.
Simply push the monitor through the patented seal of the Safe-T-Check porthole and you can test the air quality behind that door while keeping yourself out of harms way.
The seal is designed to have insulating properties, so in the frigid temperatures of the northern winters, it will not be a weak point for heat loss. We have fabricated the seal itself out of a very resiliant plastic that keeps its pliability and shape memory even at -40C.