The Ohaus Starter 300 portable meters offer convenience, reliability and durability in one compact design. The ST300C Conductivity/TDS meter features a crisp, well-organized LCD display with five clearly marked keys, built-in stand for benchtop use, memory for up to 30 measurements plus last calibration data, automatic temperature compensation with adjustable temperature coefficient, IP54 protection and 4-pole linear electrode offering a wide conductivity range that safeguards itself from polarization and pollution effects. Also includes, wrist strap, 4 "AAA" batteries and conductivity standard solution.