HM Digital COM-100 EC/TDS Meter - Professional Water Tester

Professional EC/TDS Testing for Precise Nutrient Management

The HM Digital COM-100 is the most advanced, economically priced EC/TDS meter on the market. Trusted by professional growers worldwide, this reliable digital pen delivers accurate readings for perfect nutrient solution management.

Why Choose the COM-100

• Dual Measurement: Measures both EC (electrical conductivity) and TDS (total dissolved solids) with one meter
• Professional Accuracy: Precise readings you can trust for critical growing decisions
• Easy to Use: Simple one-button operation with large, easy-to-read digital display
• Auto Temperature Compensation: Automatically adjusts readings for temperature variations
• Waterproof Design: Durable construction withstands daily use in wet environments
• Portable & Convenient: Compact pen-style design fits in your pocket for testing anywhere
• Trusted Brand: HM Digital is the industry standard for water quality testing equipment

Essential for Nutrient Management

Monitoring EC and TDS levels is critical for hydroponic success and optimal plant nutrition. Too high or too low can cause nutrient lockout, deficiencies, or toxicity. The COM-100 helps you maintain the perfect nutrient concentration for maximum growth and yields.

Perfect for hydroponics, aquaponics, water quality testing, nutrient solution mixing, and reservoir monitoring. Works with all nutrient brands and growing systems.

Specifications: Measures EC and TDS, auto temperature compensation, waterproof design, includes protective case and calibration solution