HM Digital COM-300L Water Quality Meter | EC, TDS, Conductivity & Temperature Tester

The HM Digital COM-300L is a professional-grade water quality meter designed for hydroponic growers, aquaculturists, and nutrient management professionals. This compact tester simultaneously measures electrical conductivity (EC), total dissolved solids (TDS), and water temperature—three critical parameters for maintaining optimal growing conditions. The dual-display LCD screen provides instant readings, making it ideal for nutrient solution mixing, reservoir monitoring, and water purification verification. Built for durability and accuracy, the COM-300L delivers reliable performance across hydroponic systems, aquariums, and general water quality applications. Essential for growers who demand precision in their nutrient formulations and water management protocols.