Open vs Closed Ultrasonic Sensors in CIP Environments
Published Updated By Yujie Piezo Engineering Team1,650 words9 min read
1. What CIP Really Does to an Ultrasonic Sensor
Clean-in-place (CIP) is not “just hot water.” In most plants it is a repeating sequence of thermal shocks, chemical exposure, pressure transients, and high-shear flow. The sensor is not merely splashed. It is repeatedly subjected to:
- Alkaline and acidic chemistries (often alternating). These attack polymers, adhesives, and marginal seals.
- Elevated temperatures. Heat accelerates diffusion through seals and speeds hydrolysis in susceptible materials.
- Pressure cycling and water hammer. Short spikes exploit micro-leaks and fatigue thin windows.
- Aerosol and impingement washdown. Impact jets test gaskets, face seals, and cable glands.
- Foam and entrained air. These change acoustic loading and can collapse signal-to-noise during parts of the cycle.
If you want a sensor architecture that survives, you need to think like a failure analyst. CIP is a reliability test that runs every day.