A control system for controlling water used in a food processing system, the control system comprising: a wash solution reservoir; a primary pH pump (721.1) configured to pump wash solution into a produce handling device and a secondary pH pump (721.2); a first pH sensor (725.1) and a second pH sensor (725.2) configured to sense pH of the water in the produce handling device and generate a sensor signal; a logic processor configured to receive the sensor signal generated by the sensors (725.1. 725.2) and generate a control signal for controlling addition of wash solution to the water used in the food processing system, based on the sensor signal; a Clean-In-Place, CIP, device connected to the sensors (725.1, 725.2), wherein the CIP device comprises: internal solenoids (774, 776) configured to control flow paths to sensors using valves (775, 777) based on a signal from the logic processor; an air blast device configured to deliver a filtered and oil-free burst of air to dislodge adhering material on the sensors (725.1, 725.2) and configured to clean out the flow paths to the sensors; a pressure transmitter configured to send a signal to the logic processor indicating a measurement of air pressure in the CIP device; and an air regulator protected by a filter, wherein the air regulator is configured to regulate the air pressure in the CIP device to the desired operating pressure; and a human machine interface, HMI, configured to display information from the logic processor. a wash solution reservoir; a primary pH pump (721.1) configured to pump wash solution into a produce handling device and a secondary pH pump (721.2); a first pH sensor (725.1) and a second pH sensor (725.2) configured to sense pH of the water in the produce handling device and generate a sensor signal; a logic processor configured to receive the sensor signal generated by the sensors (725.1. 725.2) and generate a control signal for controlling addition of wash solution to the water used in the food processing system, based on the sensor signal; a Clean-In-Place, CIP, device connected to the sensors (725.1, 725.2), wherein the CIP device comprises: internal solenoids (774, 776) configured to control flow paths to sensors using valves (775, 777) based on a signal from the logic processor; an air blast device configured to deliver a filtered and oil-free burst of air to dislodge adhering material on the sensors (725.1, 725.2) and configured to clean out the flow paths to the sensors; a pressure transmitter configured to send a signal to the logic processor indicating a measurement of air pressure in the CIP device; and an air regulator protected by a filter, wherein the air regulator is configured to regulate the air pressure in the CIP device to the desired operating pressure; and internal solenoids (774, 776) configured to control flow paths to sensors using valves (775, 777) based on a signal from the logic processor; an air blast device configured to deliver a filtered and oil-free burst of air to dislodge adhering material on the sensors (725.1, 725.2) and configured to clean out the flow paths to the sensors; a pressure transmitter configured to send a signal to the logic processor indicating a measurement of air pressure in the CIP device; and an air regulator protected by a filter, wherein the air regulator is configured to regulate the air pressure in the CIP device to the desired operating pressure; and a human machine interface, HMI, configured to display information from the logic processor.