We are offering digital refractometer.the hi 96811 is an optical instrument that employs the measurement of refractive index to display the sugar content ingrape samples. The measurement of refractive index is simpleand quick. Samples are measured after a simple user calibrationwith deionized or distilled water. Within seconds the instrumentmeasures the refractive index of the grape sample andconverts it to % brix concentration units. The hi 96811 digitalrefractometer eliminates the uncertainty associated withmechanical refractometers and is portable for measurementsin the field. the measurement technique and temperature compensationemploy the methodology found in the icumsa methodsbook (international commission for uniform methods ofsugar analysis). Temperature (in c or f) is displayed simultaneously with measurement on the large dual level display along with other helpful message codes. features:1.5 second measurement timeautomatic temperature compensation (atc)easy setup and storagebattery operatedautomatic shut-off specification:range 0 to 50% brix / 0 to 80c (32 to 176f)resolution 0.1% brix / 0.1c (0.1f)accuracy 0.2 % brix / 0.3c (0.5f)automatic temperature compensation between 10 and 40c (50 - 104c)measurement time approximately 1.5 secondsminimum sample volume 2 metric dropslight source yellow ledsample cell stainless steel ring and flint glass prismcase material absenclosure rating ip65battery type / life (1) 9v / 5000 readingsauto-off after 3 min