5-in-1 Digital Water Quality Tester Pen | pH, TDS, EC & Temperature Meter with Backlit Display

Monitor Water Quality with Precision

Take the guesswork out of water testing with the 5-in-1 Digital Water Quality Tester Pen. Designed for growers, hydroponic enthusiasts, aquarium owners, and home users, this all-in-one digital meter accurately measures pH, TDS (Total Dissolved Solids), EC (Electrical Conductivity), salinity, and water temperature in seconds.

Featuring a clear backlit LCD display, automatic temperature compensation (ATC), and a compact handheld design, this tester delivers fast, reliable readings whether you're mixing nutrient solutions, checking drinking water quality, or maintaining aquariums and pools. Multi-parameter meters with ATC and backlit displays are commonly used for hydroponics, aquariums, pools, and water-quality monitoring because they combine several key measurements in one portable device.

Key Features

• Measures 5 essential water parameters:
  • pH
  • TDS (Total Dissolved Solids)
  • EC (Electrical Conductivity)
  • Salinity
  • Temperature
• Bright backlit LCD display for easy reading in any lighting
• Fast and accurate digital readings
• Automatic Temperature Compensation (ATC) for improved accuracy
• Compact, lightweight pen-style design
• Simple one-button operation
• Ideal for beginners and professionals
• Suitable for fresh and saltwater testing

Perfect For

• Hydroponic growing
• Indoor grow tents
• Coco and soil nutrient mixing
• Aquariums
• Fish tanks
• Drinking water testing
• Reverse osmosis (RO) systems
• Swimming pools
• Hot tubs & spas
• Laboratories
• Water filtration systems

Why Choose This Water Tester?

Maintaining the correct pH and nutrient strength is essential for healthy plant growth and clean water. This 5-in-1 tester allows you to quickly monitor multiple water parameters with one compact device, helping you optimize nutrient uptake, reduce waste, and keep your plants, fish, or water systems performing at their best.

Whether you're an indoor grower, hydroponic gardener, or simply want peace of mind about your water quality, this reliable digital tester is an essential addition to your toolkit.