METER (DESKTOP & HANDHELD) Laboratory instrument for measuring pH, DO, ORP, Conductivity and TDS. Showing all 2 results Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low MeterBOECO pH pen with fixed electrode (not replaceable) RM0.00 MeterMETERS – table top RM0.00 Select options