Hanna Instruments HI 9813-6N Review

Oct 9th, 2012 · 0 Comment
Hanna Instruments HI 9813-6N Waterproof pH/EC/TDS Temperature Meter is a super-high quality unit that is critical for serious hydroponic gardeners. Click Here For Pricing & More Reviews. The HI 9813-6N is a highly versatile tool made by one of the most well-respected lab/scientific companies in the industry.  The HI 9813-6N is a multiparameter meter that measures pH, electroconductivity (EC),...

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