Apera GroStar® GS2 Soil pH Pen Tester (Gen II) — Direct Soil pH for Professional Growers
The Apera GroStar GS2 Gen II is a premium soil pH pen engineered for growers who need accurate, direct pH measurement in soil, coco coir, rockwool, and other grow media — as well as nutrient solutions. Where standard pH pens require slurry preparation, the GS2's Swiss LabSen® replaceable spear probe goes directly into the medium for fast, reliable results with minimal prep.
Key Features
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Swiss LabSen® Replaceable Spear Soil Probe — Purpose-built for direct insertion into soil, coco coir, rockwool, and grow media; accurate results with minimal maintenance
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PTFE Ring Junction — Prevents soil particles from clogging the junction, significantly extending probe service life in direct soil applications
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TruRead™ Measurement Mode — Measure pH across multiple spots and automatically display average, minimum, and maximum values — ideal for mapping pH variation across a grow bed or field
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2-Point Automatic Calibration — Simple workflow with electrode condition display for real-time probe health monitoring
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3-Color Backlit LCD — Clear readings in any lighting; color-coded by mode for instant status recognition
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Dual Use — Works in both solid grow media (soil, coco, rockwool) and liquid nutrient solutions
Applications
Soil pH testing, coco coir, rockwool, perlite, hydroponics nutrient solutions, cannabis cultivation, greenhouse growing, aquaponics, and outdoor agriculture.
Why GroStar GS2 Over a Standard pH Pen?
Standard pH pens require a soil slurry — mixing soil with water before testing. The GS2's Swiss spear probe with PTFE junction inserts directly into the medium, saving time and delivering more representative in-situ readings. The replaceable probe design means you protect your investment: replace only the probe when it ages, not the entire unit.
What's in the Box
- GS2 Soil pH Pen Tester (Gen II)
- Swiss LabSen® Spear Soil pH Probe
- pH Calibration Solutions
- User Manual
