HM Digital PH-200 Waterproof Temperature PH Meter, 3.3" x 8.5" x 2", White sold2026 clean and coil

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HM Digital PH-200 Waterproof Temperature PH Meter, 3.3&quot x 8.5&quot x 2&quot, White sold2026 clean and coilHM Digital PH 200 Waterproof Temperature PH Meter, 3. 3&quot x 8. 5&quot x 2&quot, White HM Digital's PH 200 is a digital waterproof pH meter (aka pH tester or pH pen) that is ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more. It is fast