Taylor Precision Products Classic Line Hot Beverage Thermometer for Coffee or Tea This compact dial thermometer measures temperatures from 0- to 220-degrees Fahrenheit. The optimum frothing temperature zone is indicated in purple on the dial, for fast at-a-glance readings. A convenient metal clip attaches the thermometer to the steaming vessel. The sealed dial will not fog, allowing for constant use. The thermometer is made of tough, stainless steel and is NSF approved.