The Bluelab pH Pen is the ultimate handy, compact, and quick solution to ensure maximum uptake of nutrients by your crops.
• Measures pH and temperature.
• Fully Waterproof.
• Selectable units for °C & °F.
• Backlit LCD display.
• Double junction probe (not replaceable).
• Successful pH calibration indicator when used with Bluelab calibration solutions.
• Hold Function.
• Low battery warning and auto off function.
• Automatic Temperature Compensation (ATC)