LAQUAtwin is a series of compact water quality testers. Using Ion Specific Electrode (ISE) technology, they are available for Conductivity, Calcium ion, Nitrate ion, Potassium ion, Sodium ion, Salt concentration and pH measurement. Using just a single drop of sample, the LAQUAtwin proprietary flat sensors can quickly and accurately measure the values of the chemical parameters for quality check of food in production lines.

1. Scale 1g of sample

2. Add 4g of water, so that it weights 5g in total

3. Shake the sample container for 1 min.

4. Drop the supernatant until it fully covers the electrode

5. Read the value after 1 min.


A: Sodium concentration
on the Label

B: Sodium Concentration after 5 Times Dilution (A÷5)*1

Measurement Result
by LAQUAtwin

Error of Each Measurement Data to Label Value*2


5390 mg/kg

1078 mg/L

1000 mg/L

within ± 10 %

Clam Chowder

6530 mg/kg

1306 mg/L

1300 mg/L

within ± 10 %

Corn Soup

6330 mg/kg

1266 mg/L

1200 mg/L

within ± 10 %

*1  Sodium concentration was calculated on the assumption that the specific gravity of sample is 1.
*2  The error may become larger for extremely viscous or oily samples.