Fieldmaster pH Tester - Accurate to 0.2

Test for pH right in the field or lab with this lightweight, waterproof, 100% buoyant pH tester. We call it electronic paper since it is far more reliable and versatile than old-fashioned pH paper. Battery operated for portability with about 250 hours of continuous use. Accurate to + 0.05 pH over 0 - 50° C.Two point calibration and auto shut-off. 163 x 40 x 26mm (6.4 x 1.6 x 1”). Ship wt: 85 g (3 oz) • Range: 0.00 - 14 pH • Resolution: 0.1 pH • Accuracy: +/- 0.1 pH • Operating Temperature: 0 - 50° C • Calibration: 2 points • Power supply: DC 4 x 1.5 v (button battery)