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Hanna Instruments Electrolyte Solution HI7041S Polarographic Dissolved Oxygen Probe Fill (30mL) 1 40101 2 Calibration: Calibrate after cleaning and rust removal Calibration: Calibrate after cleaning and storage before testing to adjust for sensor changes Protective Storage End Caps Included: Store wet between uses to keep KDF media active and prevent bacterial buildup The HI7041S electrolyte solution (concentrated potassium chloride) is held in place over the electrodes by a PTFE (polytetrafluoroethylene) membrane Keep spare bottles on hand to maintain uninterrupted testing capability
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