Apera Instruments GroStar® GS1-P pH/ORP Pen Tester Kit (Gen II) – Precision pH & ORP Monitoring for Growers & Hydroponics
The GroStar® GS1-P pH/ORP Pen Tester Kit (Gen II) is designed for growers, hydroponic farmers, and water quality experts who require accurate pH and ORP monitoring in a single device. Featuring the Swiss-engineered pH/ORP probe, this tester delivers fast, stable, and repeatable measurements, ensuring optimal nutrient balance, water treatment precision, and crop health.
Optimized for pH & ORP Monitoring in Grow Environments
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Premium pH/ORP Probe – Built with a double-junction reference system and blue gel inner solution for long-lasting accuracy and resistance to contamination.
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Reliable ORP Readings – Measures oxidation-reduction potential, helping growers monitor water quality, nutrient uptake, and system efficiency.
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TruRead Measurement Mode – Captures multiple readings automatically, displaying average, minimum, and maximum values for comprehensive analysis.
Designed for Precision & Ease of Use
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Quick 2-Point Automatic Calibration – Ensures fast, hassle-free setup with electrode condition monitoring for confidence in every test.
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3-Color Backlit LCD Screen – Offers easy visibility in bright or low-light environments, ideal for hydroponic grow rooms and outdoor setups.
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Replaceable Probe – Extends tester life, reducing replacement costs while maintaining long-term performance.
Durability Meets Practicality
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Waterproof & Impact-Resistant Design – Built for harsh growing conditions, greenhouse environments, and field use.
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User-Friendly Workflow – Simplifies pH and ORP management, allowing growers to focus on maximizing yield and system health.
Trusted by Growers, Water Quality Experts, & Hydroponic Professionals
Used by agricultural specialists, hydroponic farmers, and researchers, the GroStar® GS1-P pH/ORP Pen Tester Kit delivers unmatched precision and durability, making it a must-have for effective pH and ORP monitoring
