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![[HI98121] Hanna pH/ORP/Temperature Combo Tester (Discontinued) SUMMER • Nutradip Calibration Solution PPM Size:4’ x 4’ x 6.5’](https://cdn.shopify.com/s/files/1/0502/3340/9702/products/hi98121_withcap.jpg?v=1670473360)
[HI98121] Hanna pH ORP Temperature Combo Tester (Discontinued) SUMMER • Nutradip Calibration Solution PPM Size:4’ x 4’ x 6.5’ • Nutradip Calibration Solution PPM EC TDS Promotes healthy plants and root systems Two noble metals have proven to work well for this purpose: pure platinum and pure gold are both used in the construction of ORP sensors The potential generated is proportional to the thermodynamic activity of the ion being measured
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