GroStar GS4-E replacement pH/EC combo electrode
This replacement probe for the GroStar GS4 5-in-1 Combo Pen allows you to replace your pen's probe and extend the life of your tool. Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance.
- Measures pH, conductivity (EC and 500 PPM/700 PPM), and temperature
- Probe built with lithium glass membrane and titanium alloy
- 1-year warranty