Cole-Parmer
The Oakton 2700 Series pH meters have an expanded range; they are capable of measuring pH values from –2.000 to 20.000 with accuracies of ±0.002 and a resolution of 0.001. The pH meter has an oversized, backlit display. The meters can stamp all calibration data and stored data with time and date, according to good laboratory practices (GLP). Other instruments in the series can measure ion concentration, dissolved oxygen and more. — Cole-Parmer, Vernon Hills, Ill.