Measurement apparatus, namely, redox electrodes, pH electrodes, redox sensors, pH sensors, electrochemical sensors, potentiometric sensors; electrodes; sensors for measuring pH of water and waste water, sensors for measuring the pH of process media, sensors for measuring the internal chemistry of aqueous solutions, not for medical use; measuring equipment, namely, redox and pH electrodes; electrode gels for use with all of the foregoing goods, sold as a unit with the goods

Class C fly ash used to control expansive clays in road subgrades and construction sites