Benchtop Water Hardness Meter meter comes with a UK electrode. Stability indicator automatically shows present working status. It measures salts of calcium and other elements at mg/L, mml/ scale which causes hardness water. Automatic electrode diagnosis indicates the slope of sensor. It is equipped with large backlit LCD display, 2 to 5 points calibration with low to high concentration range. Stored data can be transferred into computer by using USB communication interphase.