Bluelab Soil pH Pen

This hardy soil pH pen measures in increments of 0.1 pH and is fully temperature compensated, so you can rely on getting accurate readings every single time. In addition, this versatile pen can be used in a variety of growing media, including soil, coco coir, potting mixes, and solutions.

• Effective in most growing media and in water/solution
• Fully waterproof - not just water resistant
• Industry-leading one-year warranty for peace of mind
• Hold reading function to capture measurements with ease
• Simple two-point calibration for increased accuracy
• Auto-off function to extend battery life
• Automatic temperature compensation for accurate readings everywhere
• 1 x AAA alkaline battery included; simply power on and go