How do you stop a propane leak in its tracks? Martin Niezen, the founder of GasStop, has the answer. He’s developed a propane tank gauge that can identify minor invisible gas leaks, prevent major leaks completely, and let you see whether there’s enough gas in your tank to get you through the day. Developed in the Netherlands, GasStop has undergone more than a year of rigorous testing to earn a UL safety rating and an ISO standard certification so US customers can purchase this high-qualit...