Case in thermoplastic material. Connection between the probe and control unit by means of two-wire cable with 1 mm² minimum section and maximum length of 1000 meters (for longer lengths increase cable section). NTC thermistor heat-sensitive element. Operating admissible temperature: -10 ÷ 45 °C. Potentiometer for set-point variation: ± 3 °C. Electric features3-pole terminal board. Probe functioning: terminals 1-2 connection excludes the possibility of set-point variation (± 3°C). Probe functioning with set-point variation: connect the terminals 1-3. Function of set-point correction: connect the terminals 2-3.