GroStar™ Premium Pen Testers are designed specifically for the horticultural market. GroStar's intelligent design reduces the guesswork so you can easily manage your crops success.

GroStar™ GS1 pH Pen Tester

• Measures pH and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Easy-to-use design and fast calibration adjustment
• Double junction replaceable probe, 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
• IP67 waterproof rating
• Powered by AAA batteries with auto off function
• Automatic temperature compensation