The GroStar™ GS2-E Spear pH Electrode is a durable and high-performance replacement electrode designed for the GroStar™ GS2 pH Pen Tester. It is also compatible with the GroStar™ GS1 and GroStar™ GS4 meters. This specialized electrode enables direct pH and temperature measurement in soil, coco, rockwool, and many other media types, as well as in nutrient solutions—eliminating the need to prepare soil slurry.

The GS2-E features an impact-resistant glass membrane that is approximately 10 times stronger than conventional glass electrodes, ensuring longevity and reliability. The PTFE ring prevents the diaphragm from clogging with soil particles, significantly enhancing the electrode's durability for long-term use. The electrode can be attached quickly and easily without the need for additional tools.

Key Features:

✔ Direct pH & Temperature Measurement – Measures pH and temperature directly in soil, coco, rockwool, nutrient solutions, and more
✔ Impact-Resistant Glass Membrane – 10 times stronger than conventional glass electrodes for increased durability
✔ PTFE Ring – Prevents diaphragm clogging from soil particles, extending electrode life
✔ Quick Attachment – Easily attaches without additional tools
✔ Compatible with GS1, GS2, and GS4 – Works with multiple GroStar™ meters
✔ Warranty – 12 months on the electrode