GroLine 1413 µS/cm Conductivity Standard with Certificate (230mL Bottle) galvanic dissolved oxygen probe 2x 5-Stage Filters (6 months

2x 5-Stage Filters (6 months each = 12-month/1-year supply)

FDA-approved)

"Accurate results and calibrated right out of the box

Clean the junction regularly to prevent clogging and maintain response time

Up to 4 Black Berkey™ Filters — Scalable filtration speed to match household demand

GroLine 1413 µS/cm Conductivity Standard with Certificate (230mL Bottle) galvanic dissolved oxygen probe 2x 5-Stage Filters (6 monthsHI7031 023 is a GroLine 1,413 S cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis. 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