Routine and reliable pH measurements
20,Jan,2025
pH measurement is often a critical early step in your workflow. We offer an extensive line of pH meters, pH electrodes, pH buffers, and pH measurement accessories designed to work seamlessly together to make your complex pH measurements routine and reliable. Measure with confidence with products you trust, like HACH,Orion and Hanna pH instruments.
What is pH and why should it be measured?
pH compares the acidity or alkalinity of a solution at a given temperature. A pH of 7 describes a neutral solution because the activities of hydrogen and hydroxide ions are equal. When the pH is below 7, the solution is described as acidic—the hydrogen ion activity increases and the pH value decreases. When the pH is above 7, the solution is described as basic (or alkaline)—the activity of hydroxide ion is greater than that of hydrogen ion.
pH electrode measurements are made by comparing the readings in a sample with the readings in standards whose pH has been defined (buffers). Thermo Scientific pH meters contain pH versus temperature values for commonly used buffers. This allows the meter to recognize a particular pH buffer and calibrate with the correct buffer value at the measured temperature.
