Apera Instruments GroStar GS3 EC Pen Mylar & Reflective Coverings It features a reinforced ribbed

It features a reinforced ribbed design to stand up to the rigors of commercial growing

and Magnesium Nitrate

or in-furrow

This facilitates a free-flowing air current that saves you from unneeded fan speed increases and higher energy costs

Apera Instruments GroStar GS3 EC Pen Mylar & Reflective Coverings It features a reinforced ribbedLab grade instruments designed specifically for growers! The GS3 EC Pen includes: 2. 77 EC calibration solution (50 ml bottle) Measures conductivity EC, PPM (500), PPM (700) and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Titanium alloy sensor designed for high accuracy EC measurement Easy to use design and fast calibration adjustment Large 3 color backlit screen gives you clear