The Fieldpiece Dual-Temperature Meter, Model ST4, Measures Two Temperatures Simultaneously Using The Included K-Type, Wrap Tab Beaded Thermocouples. The Technology Inside The ST4 Provides Superior Temperature Compensation In Rapidly Changing Environments Commonly Found While Performing Field Service. Use The ST4 To Find Delta T and Just About Any Temperature Split You Want To Measure. Displays T1, T2 and T1-T2 In Big Numbers On The Lcd Screen. Features Two Front Face Calibration Pots and Comes In Our Clear Front Case with Magnetic Hanger Model ANC6. Use with Our Optional ATWB1 Wet Bulb. Thermocouple To Help You Find Target Superheat or with Our Pipe Clamp T/Cs To Check For Blocked Dryer Filters.