The retractable assemblies permit removal and installation, while protecting both the process and operating personnel. Moving the sensor from the measuring position to a service position allows it to be cleaned, calibrated or replaced without interrupting the process. The Cleanfit CPA875 is aimed at the pharmaceutical and food and beverage industries where sensors must be removed for cleaning, calibration or maintenance on a regular basis, while the CPA871 sensor is for applications in the water and wastewater and chemical industries. In hygienic or sterile processes, the CPA875 assemblies are protected against contamination in accordance with international standards including EHEDG, ASME BPE, FDA, ATEX Directive 94/9/EC, CE/PED, EC VO 1935/2004 and Biological Reactivity (USP Class VI). The design of the service chamber allows liquid media to drain freely and completely. The alignment of the inlet and outlet, as well as the flow configuration, ensures that solid built-up deposits are loosened and removed when cleaning. It is also possible to clean and sterilize the seals' contact surfaces. This ensures the sensor is free from contamination when it is reinserted into the process. In pneumatic operating mode, the CPA871 meets ATEX and CE/PED standards.
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