The Cleanfit CPA871 sensor assembly from Endress+Hauser enables pH, ORP, oxygen and NIR sensors to be installed or removed during operation in water and wastewater treatment plants. By moving the sensor from the measuring position to a service position, the retractable assemblies allow the sensor to be cleaned, calibrated or replaced without interrupting the process. The sensor assembly is available with a manual or automatic drive. 888/363-7377; www.us.endress.com/CPA871.