Review on 📏 Dwyer 475 6 FM Digital Handheld Manometer by Calvin Chavva

There are many hospital construction projects and we need manometers to monitor our negative air content. We had a bunch of Extech meters, but we were getting readings that didn't make sense. Got these Dwyer units and they work fantastic. Since we only want readings around 0.02 inches of water, a very low range of these readings is ideal. Buy more of these sensors as they become available.