Hanna Buffer Solutions are primarily used for calibrating pH meters to ensure accurate and reliable measurements in various scientific applications. These solutions maintain a stable pH value, which is essential for precise calibration of electrochemical cells and probes. They are NIST traceable, meaning their composition has been verified by the National Institute of Standards and Technology, ensuring high quality and reliability. The buffers come in various pH values (commonly 4.01, 7.01, and 10.01) to accommodate different measurement needs across diverse fields such as research labs, water testing facilities, and food industry applications.