LAQUAtwin Meters - Spare Sensors and Standards

LAQUATWIN Three Step Measurement

Follow simple, good testing procedures for accurate and dependable results:

• Calibrate correctly
• Avoid mixing samples and standards
• Always keep the sensor clean

1 Calibrate

Always ensure the sensor is clean before calibrating. If not, clean thoroughly with water (don’t worry, LAQUAtwin meters are completely waterproof!). Place some standard solution on the sensor and press the calibration button. Once the smiley face appears, indicating that calibration is complete, wash off the standard solution with water and dry with a clean, soft tissue.

2 Test

LAQUAtwin meters only need a tiny amount of sample - so no beaker is necessary. Fill the sensor with the sample and when the smiley face appears, the measurement is complete.

3 Clean

Clean the sensor thoroughly with water, ready for the next test. When the sensor is nearing the end of its usable lifetime, it can be replaced;

• You don’t need to replace the meter.
• Sensors will need to be replaced after approx.

1500 measurements or when calibration cannot be completed. Sensors are sold separately and are easily removed and replaced.

LAQUATwin One meter Six Different Methods

Choose the best method according to your sample, your situation and your needs.

• Immersion: When you’re in the lab, you can test the sample in a beaker. Ensure the sensor guard sliding cap is open.
• Scoop: Use as a scoop to test water, for example from a river.
• Drops: LAQUAtwin meters can measure sample volumes as low as 0.05 mL. Place a drop of the sample onto the sensor with a pipette. Using the HORIBA sampling sheet, volumes down to 0.05 mL can be tested (except for conductivity measurements).
• Solid samples: Foods containing some moisture can be tested by placing a small piece directly onto the sensor.
• Powders: LAQUAtwin meters can also test dry powders. Simply place the powder sample onto the sensor, and drop on your defined volume of pure water.
• Paper and textiles: To test sheets of paper and textiles, cut up the sample into small pieces and place directly onto the sensor. Drop on your defined volume of pure water.

LAQUAtwin sampling sheet.

The sampling sheet allows trace volumes to be analysed. For example, you can even measure the pH of human skin by wiping with a sampling sheet soaked in pure water, and placing it on the sensor. Using the HORIBA sampling sheet, volumes down to 0.05 mL can be tested (except for conductivity measurements).