VTSYIQI Benchtop NH4 Ion Meter with Range 0.1 to 18000 ppm Accuracy±0.5% F.S.Calibration Fluid USB Communication Interface Auto-Read Function Measurement Units ppm mg/L mol/L mmol/L 2 to 5 Points

VTSYIQI Benchtop Nitrate Ion Meter Lab NO3 Ion Meter with Accuracy±0.5% Range 0.4 to 62000 ppm F.S. 2 to 5 Points Calibration Data Strong 2 to 5 Point Calibration Optional 8 Concentration Calibration Points Calibration Fluid

VTSYIQI Benchtop PH Meter Benchtop Acid Meter with PH Buffer Powder 2 Points Calibration mV Measuring Range -1599～1599mV pH Measuring Range 0.00～14.00 Manual Temperature Compensation for Measure The pH Value of Sample Solution

VTSYIQI Benchtop pH Meter Benchtop PH Tester with 2 Points Calibration PH Buffer Powder pH Range 0.00～14.00pH Resolutin 0.01pH mV Measuring Range -1599～1599mV Resolutin 1mV Balanced/Continuous Measurement Mode 4-inch LCD Display

VTSYIQI Benchtop pH Meter Digital pH Meters with pH Range -2.000 to 20.000 pH Accuracy ±0.002 pH ORP Range -1999.9 to 1999.9 mV Accuracy ±0.2 mV Calibration 1 point USB Communication Interface Auto-read Function

VTSYIQI Benchtop pH Meter Digital pH Meters with Range -1.00 to 15.00 pH Resolution 0.01 pH Accuracy ±0.01 pH Range -1999 to 1999 mV Resolution 1 mV Accuracy ±1 mV Manual/Auto-read Measurement Endpoint 1 to 3 Points Calibration

VTSYIQI Benchtop PH Meter for Acidity with 50 Sets Data Storage mV Measuring Range -1999～1999mV pH Measuring Range -2.00～18.00pH Movable Bracket PH Buffer Powder 6-inch LCD Display Auto-Shut Off Function 3 Points Calibration

VTSYIQI Benchtop PH Meter for Acidity with PH Buffer Powder 3 Points Calibration mV Measuring Range -1999～1999mV pH Measuring Range -2.00～18.00pH Automatic/Manual Temperature Compensation Auto-Shut Off Function 50 Sets Data Storage

VTSYIQI Benchtop PH Meter for Acidity with PH Buffer Powder mV Measuring Range -1599～1599mV Resolutin 1mV Indication Error ±1%FS pH Range 0.00～14.00pH Resolutin 0.01pH Indication Error ±0.05pH Manual Temperature Compensation

VTSYIQI Benchtop PH Meter for Acidity with PH Buffer Powder mV Measuring Range -2000~2000mV Resolutin 0.01mV pH Measuring Range -2.00～20.000pH Resolutin 0.001pH Automatic/Manual Temperature Compensation 5 Points Calibration 500 Sets Data Storage

VTSYIQI Benchtop pH Meter Kit with 0.01 pH Accuracy USB output BNC connector

VTSYIQI Benchtop PH Meter Lab Benchtop pH Meter with PH Buffer Powder mV Measuring Range -1800～1800mV Resolutin 1mV Indication Error ±0.1%FS pH Measuring Range 0.00～14.00pH Resolutin 0.01pH Indication Error ±0.01pH 2 Points Calibration