GroLine 1413 µS/cm Conductivity Standard with Certificate (230mL Bottle) galvanic dissolved oxygen probe and absence of chemical additives

and absence of chemical additives

the Aquamira Series II RED Line Filter keeps your Frontier Flow bottle performing at its best

Seychelle pH2O Filters are tested to remove up to 99

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

"Accurate results and calibrated right out of the box

GroLine 1413 µS/cm Conductivity Standard with Certificate (230mL Bottle) galvanic dissolved oxygen probe and absence of chemical additivesHI7031 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