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Extech EC500 Waterproof ExStik II pH/Conductivity Meter$135.99
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Extech EC500 Waterproof ExStik® II pH/Conductivity Meter$95.00
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Extech EC500 Waterproof ExStik II pH/Conductivity Meter TDS Meter$59.99As an eBay Partner, userbars.org may earn a commission from qualifying purchases.