The HD2107.1 and HD2107.2 are portable instruments with large LCD screens. They measure temperature using immersion, penetration or air contact probes. The sensor can be Pt100 3 or 4 wired, Pt1000 or Ni1000 2 wired. The probe is equipped with an auto-detect module, with factory calibration settings already stored in it. The HD2107.2 instrument is a data logger. It remembers up to 80,000 samples that can be transferred from an instrument connected to a PC via the RS232C serial port or USB 2.0 port. Logging, printing and baud rate intervals can be configured using the menu. The HD2107.1 and HD2107.2 models are equipped with an RS232C serial port and can transfer measurement results in real time to a PC or to a portable printer. The Max, Min, and Average functions calculate the maximum, minimum, or average value. Other functions include: REL relative measurement, HOLD function and auto power off which can also be disabled.