Mastercool 52228 - Digital Differential Thermometer
The Mastercool 52228 Digital Differential Thermometer provides instant measurement of TWO points, T1 and T2, or T1 - T2. With features like, max hold, data hold, temp in either Celsius or Fahrenheit, AUX out-put jacks, T1 - T2 differential, K type thermocouple input and it comes with two 3 ft thermocouple probes.