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™ GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen

• Measures pH, conductivity (EC and 500ppm/700ppm) and temperature (5-in-1)
• Compatible with all GroStar replacement probes: pH, Soil pH, EC and PH/EC Combo
• 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
• Durable structure, IP67 waterproof rating
• Powered by AAA batteries with auto off function
• Automatic temperature compensation