Apera GroStar GS4 5-in-1 pH & EC Combo Pen Tester Gen II | pH, EC, ppm, Temp, TruRead IP68 waterproof pH pen Diphenylcarbohydrazide method – Industry-standard colorimetric graphite electrode MA9061 Accuracy 0
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Ships within 48 hours · Estimated delivery Sep 17 - Sep 22