AI21040 – GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo Pen

Lab grade instruments designed specifically for growers!

Includes:  pH 7 & pH 4 calibration solution (50ml bottle each), 2.77 EC (50ml bottle) and KCL storage solution (10ml bottle), lanyard and user manual

• Measures pH, conductivity (EC and 500ppm/700ppm) and temperature (5-in-1)
• 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
• Powered by AAA batteries with auto off function
• Automatic temperature compensation 
• 2-year warranty on pen, 1-year warranty on probe
• Compatible with all Apera GroStar probes