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Measures nutrients levels from 0-9990 ppm with accuracy to ± 0.2%.
Reliable for more than 1000 hours of use using two 1.5 volt button-cell batteries (included).
the Sunleaves TDS Essential Digital Pen features data hold capability, automatic shutoff to preserve battery life and automatic temperature compensation.
Life span estimate is 3 years. A great tool for beginners!
Sunleaves TDS Essential Digital Pen: |
$24.95 |
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1000 ppm (TDS) calibration solution - 3 oz.: |
$7.95 |
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