Apera Instruments GroStar® GS4 5-in-1 Combo Pen Tester (Gen II) – Ultimate Precision for Growers
Take complete control of your crop management with the GroStar® GS4 5-in-1 Combo Pen Tester (Gen II)—the industry-leading tool for professional pH, EC, 500ppm, 700ppm, and temperature measurement. Designed for growers who demand accuracy and efficiency, this tester eliminates guesswork, ensuring your plants receive the perfect balance of nutrients for maximum growth and yield.
Engineered for Fast & Reliable Readings
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Double-Junction pH Sensor & Titanium Conductivity Sensor – Delivers quick, stable measurements with enhanced durability, ensuring long-lasting performance in soil, hydroponics, and nutrient solutions.
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TruRead Measurement Mode – Captures multiple readings across different locations, automatically displaying average, minimum, and maximum values for comprehensive analysis.
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Replaceable Probe Design – Saves costs with easy probe replacement, maintaining long-term accuracy without discarding the entire device.
Effortless Calibration & User-Friendly Operation
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Quick 2-Point Automatic Calibration – Ensures precision with minimal effort, featuring an electrode condition display for confident readings.
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3-Color Backlit LCD Screen – Provides clear readings in all lighting conditions, making measurements effortless, even in dark grow environments.
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Smart Nutrient Monitoring – Simplifies EC and ppm tracking, helping growers optimize feeding cycles and boost plant health.
Built for Durability & Accuracy in Grow Environments
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Waterproof, Impact-Resistant Design – Designed for harsh greenhouse, hydroponic, and soil testing conditions.
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Streamlined Workflow – Intuitive setup, smart calibration, and hassle-free operation for effortless precision.
Trusted by Professional Growers, Hydroponic Experts, & Agricultural Researchers
Used by farmers, greenhouse specialists, and soil analysts, the GroStar® GS4 5-in-1 Combo Pen Tester delivers industry-leading accuracy and reliability, making it the ultimate tool for growers who demand precise pH, EC, and temperature monitoring.
