Perfect for routine laboratory, facility process, or field pH testing where testers are used and replaced often. pH5 pocket testers have a replaceable single-junction sensor easily exchanged to ensure optimal performance while providing extended tester replacement cycles and lowering annual tester replacement costs. A large LCD makes viewing test measurements easy, featuring a three-color backlight indicating operational mode—blue for measurement, green for calibration, and red for alarm condition.

Additional features include a hold function to lock in measurements, self-diagnostic error message, and status icons for measurement stability and low battery voltage. The IP67-rated housing features an easy-to-grip design and floats if accidentally dropped in water when sensor cap is on. Powered by four AAA batteries, the testers can operate for up to 400 hours continuously. To conserve power, the unit will auto power-off after 8 minutes of nonuse.