Peracetic acid (PAA) is an extremely strong oxidizer widely used in the food industry for the disinfection of piping systems and process equipment. SEKO's peracetic acid probes are used by industry professionals around the world for repeatable results and reliability.

Peracetic acid is also used for the spray washing of food products and for the disinfection of cooling water systems. As a disinfectant agent, PAA is often preferred over chlorine products because it does not dissociate into potentially harmful products. Peracetic acid sensors are amperometric devices isolated from water by a permeable membrane. When the PAA diffuses through this membrane, it comes into contact with an active electrode and is reduced on its surface. Consequently, the sensor generates a current proportional to the concentration of PAA. Peracetic acid sensors require a constant flow of the liquid under examination through the membrane placed on the tip of the probe. Sample agitation is required and therefore not recommended in still water.