GroStar GS4-E replacement pH/EC combo electrode Pest and Disease Control If you're using it in

If you're using it in a confined space

Air Flow Control

The filter is completely airtight

even when subjected to frequent thermal cycling

GroStar GS4-E replacement pH/EC combo electrode Pest and Disease Control If you're using it inDescription Product Details: AI58040 GroStar GS4 E replacement pH EC combo electrode Measures pH, conductivity (EC and PPM) and temperature Combo probe built with lithium glass membrane and titanium alloy to ensure high accuracy and durability Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance double junction structure uses blue gel electrolyte without the air bubble 1 year warranty Specifications