Hanna Instruments 5000 uS/cm Conductivity Standard HI7039L (500ml) hydroponics --muted: #5c6b5f

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Specially formulated for cleaning electrodes

Foliar applications may help suppress leaf diseases such as powdery mildew

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Hanna Instruments 5000 uS/cm Conductivity Standard HI7039L (500ml) hydroponics --muted: #5c6b5fHI7039L is a premium quality 5,000 S cm conductivity standard that is prepared against a NIST traceable potassium chloride solution. Hanna conductivity solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hannas line of conductivity standards have been specially formulated to have an expiration of 5 years from the date of manufacture for an