... - 122°F) * Accuracy: ±0.1 pH (20°C), ±0.2 pH * Resolution: 0.1 pH * Measuring pH Range: 0.0 - 14.0 pHSpecification ... with protective plastic case and calibration screwdriverThis digital pen style pH meter is an ideal instrument for aquarium, fishing industry, ... swimming pool, school laboratory, food & beverage etc.Description:Digital pH Meter Tester Pocket Pen For Aquarium Pool Water,school laboratory ...