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

The GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo Pen from Apera Instruments was designed specifically for growers. Features: 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  Includes:  pH 7 & pH4 calibration solution (50ml bottle each) 2.77 EC calibration solution (50ml bottle) KCL storage solution (10ml bottle) Lanyard and user manual 2-year warranty (instrument) 1-year warranty (probe)