Precision Manufacturing: Uniform wall thickness and exact dimensions guarantee a consistent light path and measurement accuracy

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Hanna 1413 µS/cm Conductivity Standard 500mL Bottle - HI7031L free chlorine 0-5 ppm Precision Manufacturing: Uniform wall thicknessHI7031L is a premium quality 1,413 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. Hanna's line of conductivity standards have been specially formulated to have an expiration of 5 years from the date of manufacture for an