The Thrumometer is an in-line thermometer, ideal for measuring the temperature of your wort outflow from a counterflow chiller. The interior of this thermometer is mirror smooth, providing no places for bacteria to hide. This thermometer responds very quickly (1°F per second), has 1°F precision, and 0.5°F accuracy. It never needs calibrating. If you use a highly-efficient counterflow wort chiller, the Thrumometer will help you avoid over-chilling your wort, and will save water. This instrument is made from a head-treated highly corrosion-resistant aluminum alloy that will last a lifetime! Requires 3/8" ID tubing. Should not be used with liquids exceeding 140°F.