Endress+Hauser launches Memosens CPS47D, CPS77D and CPS97D ISFET pH sensors for applications where glass pH sensors present risk of breakage in challenging process conditions. ISFET sensors are made of unbreakable PEEK and are available with three different reference systems, providing a glass-free pH sensor to suit every requirement. CPS47D and CPS77D sensors are equipped to meet the strict demands of hygienic applications. Because of their new design, with an increased chip surface, these sensors are easy to clean. They deliver stable and reproducible measured values, even after sterilization and autoclaving up to temperatures of 275 °F (135 °C); come with the usual hygienic approvals for the food and life sciences industries and are TSE/BSE-free. They can last at least 25 CIP cycles. In addition, the CPS77D offers maximum bacteria tightness because of its microporous ceramic diaphragm. Even at low temperatures, the CPS97D has a fast response time and is chemically stable thanks to its PEEK stem. Also, its open diaphragm does not become clogged in the case of high solids concentrations.