会社のニュース How to Select a Conductivity Sensor for High-Temperature Sterilization and CIP Processes?

In industries like biotechnology, pharmaceuticals, and dairy processing, equipment must undergo rigorous cleaning and sterilization. Clean-in-Place (CIP) and Steam-in-Place (SIP) routines often expose sensors to harsh chemicals and extreme thermal loads. To survive these conditions, a conductivity sensor must be rated for temperatures up to 120°C or 135°C. Using a standard sensor in these environments would lead to internal seal failure or electrode polarization. High-temperature models, often constructed from food-grade 316L Stainless Steel or PSS (Polysulfone), are designed to maintain structural integrity and measurement accuracy even during rapid thermal cycling.

The single-channel controller plays a vital role here by utilizing its temperature measurement to verify that the sterilization temperature has been reached. During the cleaning phase, the controller monitors conductivity and TDS to detect the concentration of cleaning agents (like caustic soda or acid). Once the rinse cycle begins, the sensor tracks the decrease in conductivity, signaling to the operator exactly when the system is free of chemicals and ready for production. With pressure ratings often required up to 10 bar to handle high-pressure spray balls, these specialized sensors ensure that hygiene and process efficiency are never compromised.