SpecificationsThe type of transducer: K type thermocouple (NiCr-Niai.)Resolution: 1°CAccuracy:0°C to 500°C: ± (0.75%+1°C)           500°C to 750°C: ± (1%+1°C)0°C to -20°C: ±2°C                               -20°C to -40°C: ±3°C     -40°C to -50°C: -4°C                          750°C to 1050°C: (-3% ~0%)1050°C to 1300°C: (-5% ~-3%)  Measure range: -50°C to 750°COperating Temperature: 0°C to 50°C, Relative Humidity: ≤80%RH.Storing Temperature: -30°C to 60°C, Relative Humidity: ≤80%RH.Dimensions: 24×72×108mm.       Weight: 150g( include battery) Impedance: 100MΩ