Unlock Crop Success with the GroStar GS1 (Gen II): The Premium pH Pen Designed for Growers

Stop guessing and start growing with confidence! The GroStar GS1 Premium pH Pen (Gen II) is a lab-grade instrument engineered specifically for the horticultural market, brought to you by Apera Instruments, pioneers in sensor technology since 1991. This isn’t just a pH tester; it’s your partner in ensuring optimal nutrient solution health and maximizing your yield.

Built for the demanding conditions of growing environments, the GS1 combines precision, durability, and ease of use, taking the guesswork out of crucial pH management.

Experience the GroStar Difference:

• Unmatched Durability & Accuracy: Features a premium, double-junction pH probe with a protective sensor shield and advanced blue gel electrolyte, delivering consistently accurate pH measurements (±0.1 pH) you can rely on season after season.
• Effortless Operation: Get started quickly with simple, automatic 1-to-3 point calibration. The intuitive interface and clear, 3-color backlit LCD (White for measurement, Green for calibration, Red for error alerts) ensure easy readings, even in low light.
• Built Tough for Growers: With a rugged design and an IP67 waterproof rating, the GS1 is built to withstand splashes and demanding environments. Don’t let accidental drops into the reservoir slow you down.
• Smart & Cost-Effective: The high-quality pH probe is replaceable, saving you money in the long run. You won’t need to discard the entire pen when the probe naturally ages. Enjoy features like reading hold, °F/°C switching, and the intelligent TruRead mode which automatically records stabilized measurements for later review.
• Peace of Mind: Trust in Apera Instruments’ legacy of quality, backed by a comprehensive warranty: 2 years for the instrument and 1 year for the replaceable pH probe.
  Master Your Hydroponics pH & Nutrient Solutions:

Accurate pH measurement is critical for nutrient uptake and overall plant health. The GroStar GS1 provides the reliable data you need to maintain the perfect balance in your hydroponic systems, soil checks (with optional probe), or other horticultural applications.

Technical Specifications:

• pH Range: 0.0 – 14.0 pH
• Temperature Range: 0 – 50°C (32 – 122°F)
• Resolution: 0.1 pH, 0.1°C / 0.1°F
• Accuracy: ±0.1 pH, ±0.1°C / ±0.1°F
• Calibration: Automatic 1-3 points (pH 7.00, 4.00 standard; 10.01 optional)
• Probe Type: Replaceable Double-Junction pH probe with Blue Gel Electrolyte
• Waterproof Rating: IP67
• Power: 4 x AAA Batteries (included)

What’s Included in the Box:

• GroStar GS1 Premium pH Pen (Gen II)
• pH 4.00 Calibration Buffer Solution
• pH 7.00 Calibration Buffer Solution
• 3M KCL Probe Soaking Solution
• Lanyard
• 4 x AAA Batteries

Invest in precision, durability, and the success of your crops. Add the GroStar GS1 Premium pH Pen to your essential toolkit today!