The TH-500 is a handy, pocket-size electric thermometer endowed with the following benefits: Quick Response. Using a temperature sensitivethermistor as thermal elememt, temperature ranging from —50°F to 570°F is readily read on the double scale provided. AC Voltmeter. Two AC voltage ranges reading 150V and 300V at full scale measure the power voltage of a unit of which the temperature capacity may be checked. Ohmmeter. The ohm scale provided not only measures resistance up to 100k, but also is available to check the line continuity of electric heating appliances. Temperature Compensation. The temperature compensation circuit using a semiconductor gives the meter movement good temperature characteristic.