VTSYIQI Water Flow Speed Meter Water Velocity Meter for Open Channel Flow with Temperature Range -10°C to 50°C Speed Range 0.01 to 10.00m/s Pole Positioning Measurement Method Current Measurement Error ≤1.5%

VTSYIQI Water Flow Velocity Meter Flow Rate Measurement Open Channel Water Velocity Meter with Speed Range 0.01 to 10.00m/s Current Measurement Error ≤1.5% Temperature Range -10°C to 50°C Pole Positioning Measurement Method

VTSYIQI Water Flow Velocity Meter Water Flow Speed Meter with Pole Positioning Measurement Method Speed Range 0.01-5.00 m/s Temperature Range -10 ° C-50° C LED Backlight Current Measurement Error ≤1.5% LCD Display

VTSYIQI Water Hardness Analyzer Benchtop Water Hardness Meter with Standard Calibration Solution Concentration Range 0.05 to 200 mmol/L Automatic Temperature Compensation for Measuring Calcium and Magnesium Ion Concentration in Water Samples

VTSYIQI Water Hardness Analyzer Laboratory Water Hardness Meter with Standard Calibration Liquids Range (CaCO₃) 0 to 19999 mg/L (CaO) 0 to 11220 mg/L (Boiler) 0 to 400 mmol/L (Ca²⁺) 0 to 8020 mg/L Stores Up to 500 Data Sets

VTSYIQI Water Hardness Meter Benchtop Water Hardness Meter Tester with Standard Calibration Solutions 0.01/0.1/1/10/100 mmol/L Concentration Range 0.05-200 mmol/L 2 to 5 Points Calibration Accuracy ±1% F.S.

VTSYIQI Water Hardness Meter Digital Water Hardness Meter with Standard Calibration Liquids Range 0.05 to 200 mmol/L Manual/Auto-read Measurement Endpoint Stores Up to 500 Data Sets Backlit LCD Display Automatic temperature compensation

VTSYIQI Water Hardness Meter Laboratory Water Hardness Meter with Calibration Liquids Range 0 to 1122°dH Range 0 to 1404°e Resolution 0.001, 0.01,0.1,1 Automatic Automatic Temperature Compensation Manual/Auto-read Measurement Endpoint

VTSYIQI Water Hardness Meter Laboratory Water Hardness Meter with Standard Calibration Solution Resolution 0.001,0.01,0.1,1,Automatic Accuracy ±1% F.S. 2 to 5 points Calibration Concentration Range 0.05 to 200 mmol/L Manual/Auto-read Measurement Endpoint

VTSYIQI Water Hardness Meter Portable Water Hardness Meter with Standard Calibration Solutions Range 0.05 to 200 mmol/L Resolution 0.001, 0.01,0.1,1 Automatic Accuracy ±1% F.S. Selectable Water Hardness Units for Measuring Concentration

VTSYIQI Water Hardness Tester Laboratory Water Hardness Meter with Standard Calibration Solution Concentration Range 0.05-200 mmol/L Accuracy ±1% F.S. Selectable Water Hardness Units for Measuring Calcium and Magnesium Ion Concentration in Water Samples

VTSYIQI Water Hardness Tester Portable Water Hardness Meter with Calibration Liquids Concentration 0.05~200 mmol/L Temperature 0 to 105°C USB Interface 500 Data Memory for Measuring Calcium and Magnesium Ion Concentration in Water Samples