Any one had any experience fitting refrigerant leak sensors into open front multi-decks, wide-island & glass-door freezer cases, glass-front deli cabinets, walk-in medium & low temp cold rooms etc. I'm finding that when a particular rack system springs a leak that by the time the loss is large enough to trigger a high temp alarm, someone at the store or security monitoring centre notices and places a call, you finish the job you're on & get to site, suss out problem and locate the leak, you have generally lost 100 kg or more of 404A. There has to be a better way of detecting leaks early or small leaks before they become big ones. Any ideas ?