This Gaggia Dial Thermometer with Clip is a must have accessory to your Gaggia espresso machine. The Gaggia Dial Thermometer will let you monitor milk temperatures as you steam and froth, which takes the guess work out of frothing. The convenience of the Gaggia Dial Thermometer is especially helpful to those who may be new to milk frothing. The thermometer can be clipped right to the inside of your frothing pitcher for hands-free operation. The Gaggia Dial Thermometer is a commercial-style thermometer and does not have an absolute zero point.