Product Description   Specification item value Place of Origin China Model Number TFY-B Measuring mode 2-wavelength concentration difference of optical methods Sensors Silicon semiconductor photodiode Measuring area 2mm*2mm Display mode measuring value: 3 digits liquid crystal display Measuring Range 0.0-99.9 SPAD, -10~99.9°C Accuracy ±3.0 SPAD; ±0.5°C Operating temperature -10-50°C Power 4.2V -2000mA, rechargeable Li battery Memory capacity 30kb Weight 200 grams    

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