Premium Coconut Shell GAC: Highest-grade acid-washed coconut shell activated carbon — not the cheaper bituminous (coal-based) carbon used by competing brands

Diphenylcarbohydrazide method – Industry-standard colorimetric testing delivers reliable chromium VI analysis

repeatable iodine concentration measurements across a range of 0

The MW150 MAX Bench Meter is accurate to ± 0

Hanna 84 µS/cm Conductivity Standard (500mL Bottle) 810666004225 Premium Coconut Shell GAC: Highest-gradeHI7033L is a premium quality 84 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