Ohaus Starter ST2100-E Bench pH Meter, -2.00 – 16.00 pH, (w/Electrodes), 30057495. After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of benchtop pH meters. Starter 2100 is the economical choice for applications requiring simple pH measurement. With the attached quick guide, five clearly marked keys and user friendly software, novices can operate the meter with minimal training. The built-in electrode holder provides uncomplicated and convenient all-in-one operation while the large LCD display screen clearly displays results. Auto buffer recognition, electrode condition icon, automatic temperature compensation and reference input all work to ensure accurate results.