MODEL RC-26. (6 PARAMETERS) Display 3.5 Digit LCD. PH: Range & Resolution pH 0 to 14.00 & pH 0.01. Accuracy & Temp. Comp. pH 0.01 ± 1 Digit & 0 to 100 Deg. C. ORP: Range & Resolution 0 to ±1999mV & 1mV. Accuracy 1 mV ± 1 Digit. Conductivity : Range & Resolution 0 to 200 M Mhos/Cm IN 4 range & 0.1 u Mhos/Cm. Accuracy & Cell Constant 0.5% of Range ± 1 Digit & 0.4 to 1.5 on Display. TDS : Range & Resolution 0 to 200ppt in 4 range & 0.1 ppm. Accuracy & Cell Constant 0.5% of Range ± 1 Digit & 0.4 to 1.5 on Display. DO: Range & Resolution 0 to 20ppm & 0.1 ppm. Accuracy & Temp. Comp. 0.2 ppm ± 1 digit & 5 deg.C to 55 deg.C Do Sensor Gold/Silver Amperometric probe. TEMPERATURE : Range & Resolution 0 to 100 deg.C & 0.1 deg.C. Accuracy 0.2% of Range ± 1 Digit. MODEL RC-27. (7 PARAMETERS) Display 3.5 Digit LCD. PH: Range & Resolution pH 0 to 14.00 & pH 0.01. Accuracy & Temp. Comp. pH 0.01 ± 1 Digit & 0 to 100 Deg. C. ORP: Range & Resolution 0 to ±1999mV & 1mV. Accuracy 1 mV ± 1 Digit. Conductivity : Range & Resolution 0 to 200 M Mhos/Cm IN 4 range & 0.1 u Mhos/Cm. Accuracy & Cell Constant 0.5% of Range ± 1 Digit & 0.4 to 1.5 on Display. TDS : Range & Resolution 0 to 200ppt in 4 range & 0.1 ppm. Accuracy & Cell Constant 0.5% of Range ± 1 Digit & 0.4 to 1.5 on Display. DO: Range & Resolution 0 to 20ppm & 0.1 ppm. Accuracy & Temp. Comp. 0.2 ppm ± 1 digit & 5 deg.C to 55 deg.C Do Sensor Gold/Silver Amperometric probe. TEMPERATURE : Range & Resolution 0 to 100 deg.C & 0.1 deg.C. Accuracy 0.2% of Range ± 1 Digit. TURBIDITY : Range & Resolution 0 – 1000 NTU & 1NTU.