The GroStar ™ Premium Pen Tester was specially developed for the garden market. GroStar’s intelligent design reduces the guesswork so you can achieve greater success with your harvest.

Features of GS2 Premium Soil pH Pen:

• Measures pH and temperature in nutrient solution, soil, coco coir, rockwool, and many other media types
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Impact-resistant spear glass tip, 10 times stronger than conventional glass bulb
• PTFE ring prevents a clogged junction caused by soil particles, significantly increases durability
• Backed by GroStar proprietary sensor technology from Switzerland
• Easy to use design and quick calibration setting
• Replaceable Swiss LabSen Spear Soil pH Probe
• Large 3-color backlit screen gives you clear information
• Durable structure, IP67 waterproof rating
• Powered by AAA batteries with auto-off function
• Automatic temperature compensation

Lab Grade instruments designed specifically for growers GS2

• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance.
• Easy to use design and fast calibration adjustment.
• The probe is replaceable so you don t have to discard the entire pen when the probe reaches its end of life.
• Large 3 color backlit screen gives you clear information even in dark backgrounds.
• Durable structure, IP67 waterproof, powered by 4 AAA alkaline batteries

Swiss LabSen ® Spear Soil pH Probe

• Backed by Apera's proprietary sensor technology from Switzerland.
• Impact resistant spear glass tip, 10 times stronger than conventional glass bulb.
• PTFE ring prevents a clogged junction caused by soil particles, significantly increases durability.
• Long life reference system ensures high durability.