Peracetic acid card reader and card style sensor

A sensor system for detecting a concentration of a component of a liquid disposed in a liquid treatment system, the sensor system comprising:

• a sensor card support system for supporting a disposable sensor card in fluid communication with the liquid in the liquid treatment system, the sensor card including a plurality of electrodes and a reuse-prevention system;
• a controller for establishing electrical contact with the electrodes for electrochemically measuring an electrical property of the electrodes which is dependent on the concentration of the component in the liquid;
• a reuse-prevention activation system for activating the reuse prevention system;
• and,
• a detector for detecting an activation of the reuse-prevention system.

A method of preventing reuse of a disposable sensor card for detecting the concentration of a decontaminant in a decontaminant solution, the sensor card including a plurality of electrodes and a reuse-prevention system, the method comprising:

• determining whether the reuse-prevention system on the sensor card has been activated;
• and,
• if the reuse-prevention system has not been activated,
• clamping the sensor card such that the electrodes are in contact with the decontaminant solution,
• sensing an electrical property of the electrodes which is dependent on the concentration of a decontaminant in a decontaminant solution, and
• activating the reuse-prevention system.

A method of decontamination of items with a decontaminant solution, the method comprising:

• disposing the items to be decontaminated in a chamber;
• determining whether a reuse-prevention system on a disposable sensor card has been activated, the sensor card including a plurality of electrodes;
• and,
• if the reuse-prevention system has not been activated,
• clamping the sensor card such that the electrodes are in contact with the decontaminant solution,
• sensing an electrical property of the electrodes which is dependent on the concentration of a decontaminant in the decontaminant solution, a
• contacting the items with the decontaminant solution for a period sufficient to effect decontamination,
• activating the reuse-prevention system, and
• unclamping the sensor card.