The Lab Junction pH & EC Tester/Meter LJ-pH-030 + LJ-653-3-4 is a compact, dual-function digital device designed for quick and precise measurement of pH and electrical conductivity (EC) in various liquid samples. With wide measuring ranges of 0–14 pH and 10–1,990 µS/cm, this pocket-sized tester offers reliable performance for laboratory, industrial, and field use.