pH

WHAT IS IT?

About pH

pH, commonly used for water measurements, is a measure of acidity and alkalinity, or the caustic and base present in a given solution. It is generally expressed with a numeric scale ranging from 0-14. The value 7 represents neutrality. The numbers on the scale increase with increasing alkalinity, while the numbers on the scale decrease with increasing acidity.

Each unit of change represents a tenfold change in acidity or alkalinity. The pH value is also equal to the negative logarithm of the hydrogen-ion concentration or hydrogen-ion activity. pH values for some common solutions are listed in the table to the right.

pH sensors are essential instruments used across various industries and research fields to measure the acidity or alkalinity of solutions. These sensors employ different technologies, such as glass electrodes and reference electrodes, to detect the concentration of hydrogen ions in a solution, which determines its pH value. Whether in laboratory settings or industrial processes, pH sensors enable precise monitoring and control, ensuring product quality, environmental safety, and regulatory compliance. With their ability to provide real-time data and withstand challenging conditions, pH sensors play a critical role in numerous applications, from chemical manufacturing and water treatment to food production and environmental monitoring.

pH Calculator