The Gro’Star Series is Apera’s dedicated horticulture line — Gen II lab-grade pen testers purpose-built for growers. Every model features IP67 waterproof construction (floatable), 3-color backlit LCD for dark grow rooms, replaceable probes, and TruRead™ mode that averages readings across multiple sample points for true accuracy.
Drop it in the reservoir — it floats. Fully submersible and sealed for the harshest grow room conditions. No more replacing meters after accidental dunks.
Takes measurements across multiple points, then automatically calculates and displays average, minimum, and maximum values. True accuracy, not a single-point guess.
Never throw away the whole pen. All Gro’Star models use replaceable probes that snap in. The instrument lasts for years; just replace the sensor when needed.
White for measurement, green for calibration, red for errors. Instantly readable in dark grow rooms. No squinting at screens under HPS or green light.
ISO 9001 certified facility in Columbus, Ohio. In-house sensor manufacturing across 60+ countries. 2-year instrument warranty, 1-year probe warranty on Gro’Star.
Both 500-scale and 700-scale ppm modes built in. Compatible with any nutrient brand’s feed chart — no conversion math needed.
