The PPM Probe Gel is specifically formulated for use with Chemtrol free chlorine sensors, ensuring precise and reliable measurements. This gel is designed to maintain optimal performance and accuracy of sensors such as PPMFC002, PPMFC010, PPMFC002S, PPMFC010S, PPMTC002, PPMTC010, PPMBM002, and PPMBM010. By enhancing the functionality of these sensors, the PPM Probe Gel ensures accurate readings for effective water quality management.