Amprobe TMD-50 [3730150] K Type Dual Input Thermocouple Thermometer  ( -200°C to 1372°C). The Amprobe TMD-50 Thermometer is the professional choice for HVAC technicians, electricians, research, industrial process, and quality control. The TMD50 thermometer offers dual inputs for easy super-heat and sub cool temperature measurements as well as cut-out and in temperature measurements. To monitor and track temperatures, the multi-logging thermometer features a real-time clock with calendar, user-selectable recording intervals, and easy data recall using up and down keys. The Amprobe TMD-50 has a K-Type Thermocouple which measures temperature from -328°F to 1999°F, -200°C to 1372°C and is user selectable from Celsius or Fahrenheit.