The CPS11‑2AA2ESA analog pH sensor is part of the Orbisint CPS11 family, engineered for reliable, low‑maintenance pH measurement in process and environmental engineering. It uses a glass electrode measuring principle with a dirt‑repellent PTFE ring diaphragm, ensuring stable performance even in difficult media such as wastewater, cooling water, and boiler feed water. The probe is suitable for continuous monitoring and limit control where stable process conditions are required.
This pH probe employs a two‑chamber reference system with a long poison diffusion path, which contributes to a long electrode life and reduced maintenance. The CPS11‑2AA2ESA version is rated for pressures up to 16 bar (232 psi) and process temperatures up to 135°C (275°F), with a 120 mm shaft length. It can be equipped with an integrated Pt100 or Pt1000 temperature sensor for accurate temperature compensation, and its compact 12 mm (0.46 in) diameter enables mounting in tight spaces.
Physically, the sensor is built with a glass/PTFE construction and a Pg13.5‑style process connection combined with a TOP68 plug‑in head for quick connection to compatible cables and transmitters. The design is low‑maintenance, chemically resistant to highly alkaline media, and includes biocompatibility‑related approvals in line with ISO 10993‑5 and USP. With IP68 protection and options for hazardous‑area certification, the Endress+Hauser CPS11‑2AA2ESA Orbisint CPS11 is a versatile analog pH sensor for water treatment, chemical, power, and industrial process applications.
