The first in-line thermometer! Now you can monitor the temperature of the wort as it goes from your counterflow wort chiller to your fermentation vessel. All interior surfaces are mirror-smooth, so there is nowhere for bacteria to hide, and it is easy to sanitize. Quick responding thermometer responds at the rate of 1 degree per second. Accurate to within 1 degree. Never needs calibrating. Used with any counterflow wort chiller (cannot be used with immersion chillers), the Thrumometer will help you avoid over-chilling your wort, and save water. Constructed of heat-treated corrosion-resistant aluminum alloy, will last a lifetime! Tubing with an inner diameter of 3/8 inches will fit the thrumometer.