The Freeze Miser™ works like the thermostat in your house. It attaches to your outdoor faucets and senses the internal water temperature arriving, not the air temperature. It can be 40º F or -40º F, it does not care.
When the water temperature hits 37º F the Freeze Miser™ activates. No water is allowed to drip until the activation temperature is reached. As the water temperature fluctuates, so does the dripping. The colder the temperature the more water to help prevent the faucet and hydrant pipe stand from freezing.
This technology is closely associated with temperature sensitive valves that protect water troughs from freezing in feedlots, dairies, and ranches throughout the Midwest. It is a proven system!