Apera Instruments GroStar GS4 5-in-1 pH/EC/PPM/Temp Combo Pen

GroStar Product Documents GroStar pH 4 Solution SDS GroStar pH 7 Solution SDS GroStar pH 10 Solution SDS GroStar ORP Storage Solution SDS Lab grade instruments designed specifically for growers! The GS4 5-in-1 Combo Pen 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