The robust and compact measuring instrument with one probe input for high-precision Pt100 probes and two inputs for fast thermocouple probes. Three additional probes can be connected wirelessly to the testo 735-2 via an optional wireless module. With the pluggable Pt100 probe, a system accuracy of 0.05 ºC with a resolution of 0.001 ºC is achieved. This makes the measuring system ideal as a utility standard. The temperature curves can be recorded in the measuring device and analyzed graphically/tabularly on the PC. Via an optional measured value printer, the data can be printed on site.