That provides accurate measurement of pH, oxidation-reduction potential(ORP), conductivity, salinity, and total dissolved solids (TDS).Starter pen meter are the economical option,Simple Operation in a Slim and Portable Design
That provides accurate measurement of pH, oxidation-reduction potential(ORP), conductivity, salinity, and total dissolved solids (TDS).Starter pen meter are the economical,Durably Constructed to Withstand Wear and Tear Resulting from Repetitive use
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