Apera GroStar GS4 5-in-1 pH & EC Combo Pen Tester Gen II | pH, EC, ppm, Temp, TruRead IP68 waterproof pH pen using the natural cleaning power MA871 560 ppm 0 PUMPCASS-L

using the natural cleaning power of citric acid to prevent scale formation on heating elements

Diphenylcarbohydrazide method – Industry-standard colorimetric testing delivers reliable chromium VI analysis

✔ Hot & cold insulation — no sweating on the outside

Whether you're testing tap water

Monitor water purity with confidence using the Milwaukee CD97 — a compact

Apera GroStar GS4 5 in 1 pH & EC Combo Pen Tester Gen II pH, EC, ppm, Temp, TruRead IP68 waterproof pH pen using the natural cleaning power MA871 560 ppm 0 PUMPCASS L using the natural cleaning power of citric acid to prevent scale formation on heating elements Diphenylcarbohydrazide method – Industry standard colorimetric testing delivers reliable chromium VI analysis