Whenever wort gets too cold, you wind up with long lag times and increased opportunities for bacteria to infect your beer. Whenever it gets too hot, off-flavors can form.
The ThruMometer allows you to adjust the wort and / or water flow rates in your counterflow heat exchanger to dial in the exact wort temperature your specific yeast culture requires, with no more guesswork!
While traditional in-line thermometers are made from a complicated assembly of pipe fittings with numerous places for bacteria to build up, the ThruMometer's™ entire interior is mirror-smooth, offering bacteria no place to hide. Plus, its non-serrated barbs are much easier to clean and use— thus neither harboring bacteria nor damaging hoses. Press-fit ends are machined to 0.005" precision and finely finished to allow a 1/2" ID hose to snugly and securely fit over the barb.
The ThruMometer™ is also far more usable than competitors' digital or bi-metal thermometers, with an extremely fast-responding, highly conductive aluminum body and liquid crystal thermometer (up to 1°F per second), incredible accuracy (0.5°F), and the ability to dial in your desired temperature to within 1°F!
The ThruMometer™ never needs calibration and is built for a lifetime of use, with heat-treated, corrosion-resistant aluminum.
More information available here.