pH, ORP, DO, ISE and conductivity measurements in one compact unit. This highly versatile, competitively-priced, multi-channel, multi-display meter is easy to set up and use while delivering exceptional, long-life performance for demanding R&D and QA/QC applications. Easy to use 3-button function. Bright LCD display with ready indication. Convenient built-in Quick-Start Guide. The rugged meter offers a full complement of GLP-related features-including 21 CFR Part 11 software.