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Orp Tester

Let your soil breath!

Oxygen Reduction Potential or available oxygen. Oxygen availability is crucial to the plant’s uptake ability. Based on ORP reading, available oxygen can be easily adjusted using hydrogen peroxide. This definitely enhances the effectiveness of foliar feeds by increasing plant ability to absorb them. ORP and pH readings together provide an “rH value,” which is used to diagnose the biological condition of your soil. Read more on our Soil Test overview page.

Hanna ORP Reference Solution (Pint)
Hanna ORP Reference Solution (Pint)


$29.99 $20.99
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