The Conductivity TDS Calibration Standard Solution is an essential tool for ensuring accurate readings from your conductivity and TDS meters. This high-quality calibration solution, made from potassium chloride, is designed to standardize your meters to guarantee reliable measurements of water quality. With a conductivity of 12,880 µS/cm and a TDS level of 9016 ppm, this solution provides precise calibration to maintain the performance of your testing instruments. The 120 mL bottle offers a convenient size for repeated use, making it ideal for both professional and personal applications, including pool and spa maintenance.