testo 922 is a temperature measuring instrument which is especially suited to applications in the HVAC field. The measuring instrument records the temperature values of two connected thermocouple probes, and shows these simultaneously together with the differential temperature in the display. FEATURES: Ideally suited for applications in the HVAC field 2-channel temperature measuring instrument with optional wireless probes Display of differential temperature TopSafe, the indestructible protective cover, protects from dirt and impact Continuous display of min./max. values Hold-button for freezing measurement values