What hand coffee thermometer?

Now is a great variety of thermometer, hand coffee with a thermometer? Instrument recommendation: it is recommended to use PT2008 thermometer, safe and reliable, economical and practical. Hand coffee need to be very accurate control of temperature, at the best coffee water temperature from 88 to 94 degrees. The water temperature is too high, easy to bitterness, the water temperature is too low and easy extraction. Temperature control is also affected to cook a big focus, so the hand coffee thermometers are loved by a lot of coffee control. PT2008 thermometer is a kind of bimetallic thermometer, bimetallic thermometer is a round shape into threaded heat bimetallic strip as thermal devices, and put it in a protective sleeve tube, one end is fixed, known as the fixed end, the other end of the connection on a thin shaft, called the free end. Spool at the free end is equipped with a pointer. When the temperature changes, the resulting thermal devices the free end of the rotation, drive the thin axis from the Angle of the pointer changes, corresponding temperature indicator on the dial.