Pi (Process Instruments) were approached in 2008 by a customer who was having to change their pH sensor every week at massive cost due to the fouling of the sensor. In response PI developed the Autoflush. The Autoflush can be used with Pi's pH, ORP, free chlorine, total chlorine, ozone or chlorine dioxide sensors (or a combination of sensors) and consists of a large flow cell that automatically empties on a user selectable time basis. The signal from the sensor is held and the whole flow cell including the sensor(s) is flushed with clean water. For the original customer this meant a new pH sensor after 18 months resulting in a significant improvement in process control and a very significant saving in pH sensors. Since then many customers have taken advantage of the Autoflush and it is installed around the world in Paper Mills, Food factories and other plant where keeping the sensors clean enhances their performance.
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Residual Chlorine Analysers - CRIUS Autoflush with Success - an autoflushing device that flushes the pH sensor with warm, soapy water regularly enough to prevent rather than remove build up of ink.