Apera Instruments provides all types of scientific instruments and sensors for measuring pH, ORP, conductivity, TDS, salinity, dissolved oxygen, turbidity, and ISE with industry leading technologies and strict quality control systems. They have been focusing on the development of water analysis instruments and sensors since 1991. More than a million pieces of Apera products are being used by customers in over 50 countries. All the products are CE and RoHS certified and are manufactured by ISO 9001:2015 certified manufacturing base. For over 28 years, they have been dedicated to providing more reliable, accurate, and user-friendly water analysis instruments and sensors, a goal we continue to strive for. Pure Aquatics supplies the range of premium and economical testing options for a wide range of parameters and applications.