Evaluating the performance of a coffee maker is trickier than it might sound. You need to know what good drip coffee actually is and, according to the Specialty Coffee Association, there are essential criteria to brewing well. Brewing time and water temperature top the list. Hot water should come into contact with grounds for no less than four minutes and no more than eight. The ideal water temperature range is between 197 degrees Fahrenheit (92 degrees Celsius) and 205 degrees Fahrenheit (96 degrees Celsius).
To see how well each coffee maker meets that challenge, we log the length of their brew cycles. We also employ thermocouple heat sensors connected to industrial-grade data loggers. That enables us to record the temperature within the coffee grounds while brewing is underway.
We measure the temperature inside the brewing chamber of every coffee maker we test.
After brewing coffee, we take sample readings of the produced coffee liquid with an optical refractometer. Given that we factor in the amount of water and freshly ground coffee used, that data lets us calculate the Total Dissolved Solids percentage of each brew. From there we arrive at the extraction percentage. The ideal range is commonly thought to be between 18% and 20%.
We also back up measured data with a good old-fashioned taste test. Overextracted coffee tastes bitter and sharp, while underextracted coffee is usually weak or sour. And to be certain, we brew identical test runs a minimum of three times to get a sense of the average results.
Coffee maker FAQs
اكتشاف المزيد من موقع شبرون
اشترك للحصول على أحدث التدوينات المرسلة إلى بريدك الإلكتروني.
