U-50 Multiparameter Water Quality Meter Horiba Scientific Specifications U-50 series Feature comparison Model U-51 U-52 U-52G U-53 U-53G pH Dissolved Oxygen Conductivity Salinity TDS(Total Dissolved Solid) Seawater specific gravity Temperature Turbidity (LED) Turbidity (Tangsten lamp) Water depth ORP (Oxidation Reduction Potential) GPS pH (mV) Sensor Probe Model U-51 U-52 U-52G U-53 U-53G Max.items displaying simultaneously 9 10 11 10 11 Measurement temperature -10 to -55C Max. sensor diameter Approx. 96 mm Probe length Approx. 340 mm Cable length 2m 10m 30m Mass Approx. 1800 g Automatic calibration (use HORIBA 100-4) Applying to all models Turbidity wiper Measurement depth Max. 30 m Material contact with liquid PPS glass SUS316L SUS304 FKM PEEK Titaniumu FEP membrane POM Water resistance JIS protection level 8 Control Unit Model U-51 U-52 U-52G U-53 U-53G Outer dimensions 115(W) X 65(D) X 280(H) mm Mass Approx. 800 g (Without Batteries) LCD 320 X 240 Graphic liquid crystal with backlight (black and white) Data memory 10000 Data Sets Communication USB peripheral Battery C batteries x 4 CR2032 x 1 Water resistance JIS protection level 7 (when sensor cable is connected) Battery life U-51 U-52 U-52G Approx. 70 hours (without backlight) U-53 U-53G Approx. 500 measurements Storage temperature -10 to 60C Ambient temperature -5 to 45C pH (Avaliable In All Models) Two point calibration Automatic temperature compensation Measurement principle Glass electrode method Range pH 0 to 14 Resolution 0.01pH Repeatability 0.05pH Accuracy 0.1pH Dissolved Oxygen (Available in All Models) Salinity conversion (0 to 70 PPT automatic) Automatic temperature compensation Measurement principle Polarographic method Range 0 to 50.0 mg L Resolution 0.01 mg L Repeatability 0.1 mg L Accuracy 0 to 20 mg L 0.2 mg L 20 to 50 mg L 0.5 mg L Conductivity (Avaliable in All Models) Auto range Automatic temperature conversion (25C) Measurement principle 4 AC electrode method Range 0 to 10 S m (0 to 100 mS cm) Resolution 0.000 to 0.999 mS cm 0.001 1.00 to 9.99 mD cm 0.01 10.0 to 99.9 mS cm 0.1 0.0 to 99.9 mS m 0.1 0.100 to 0.999 S m 0.001 1.00 to 9.99 S m 0.01 Repeatability 0.05 F.S. Accuracy 1 F.S. (Median of two-point calibration) Salinity (Avaliable in All Models Measurement principle Conductivity conversion Range 0 to 70 PPT (permillage) Resolution 0.1 PPT Repeatability 1 PPT Accuracy 3 PPT