The Horiba Model S010 Replacement Sensor for LAQUAtwin pH-11, pH-22, pH-33, B-713, B-213 pH Meters, # 3200459834 is a waterproof replacement sensor that allows you to take simple, fast, and accurate measurements. Employing the same test principle as standard laboratory electrodes, the LAQUAtwin packs all components into a flat sensor that's less than 1 mm thick.
