HI99104 is an ideal pocket tester for educational purposes. Designed with a 0.01 pH resolution and two-point manual calibration through easy-to-reach trimmers, it immediately displays pH variations to reflect the smallest change in the sample. Unlike conventional testers, HI99104 has a long and slim stem, ideal for measurements in small samples or test tubes. HI99104 is supplied with a rugged, plastic body electrode with a screw connector that allows for quick and easy electrode replacement. Additionally, it’s low power demand allows for 1000 hours of battery life with common 1.5V batteries.