Oakton 1413 microsiemens/cm Conductivity Standard Solution, 500 ml refurbished-products but shifted ratios on the

but shifted ratios on the NPK to allow for the 2-4 week vegetation time that indoor growers are accustomed too (versus the 2-3 month outdoor vegetation time)

Improved Protections

4 foot T5 lamps

These industrial combination pH or ORP sensors use the conventional measurement technique

Use on any food or non-food crop up to day of harvest

Oakton 1413 microsiemens/cm Conductivity Standard Solution, 500 ml refurbished-products but shifted ratios on theStandards have KCl, NaCl and 442 conversions printed on the bottle for ease of use. Temperature corrections are printed on the bottle, with the certified values listed in the tables, accurate to within 0. 5% and are referenced to 25C.