Designed to bring simplicity to pH testing during the any process, the HI98100 Hanna Checker Plus pH Tester is designed for direct measurement. A replaceable electrode extends the life of your digital pH tester. Better Features for Better Testing An onscreen stability indicator ensures the highest level of confidence in your results. The selectable auto-off feature prolongs battery life for peace-of-mind and energy savings if the meter is accidentally left on. Pocket Sized The compact size makes the HI98100 Checker Plus pH tester ideal for on-the-go testing. A large LCD display provides at-a-glance readings from any angle and single button operation streamlines the testing process for any user. Long Battery Life The included CR2032 Li-ion battery provides up to 1000 hours of continuous use. The battery icon will blink to let you know it is time to change the battery so you never miss a measurement. Your measurements require detailed attention; so should your electrode. The HI98100 features a replaceable electrode that is ideal for general pH measurements. Tapered Electrode Design The supplied HI1271 pH electrode is 103 mm long and tapers to an 8 mm diameter at the sensing end to easily fit into test tubes, vials, and other containers with a small opening. Plastic Body The plastic body is significantly reduces necessary maintenance. No-hassle Replacement Don’t let a broken electrode stop you from testing. Simply unscrew the old electrode, and screw on a new one for just $20.