Blue Lab Pen (PH).
This clever little PH Pen from Blue Lab will help you manage the success of your crops, The PH pen provides a PH reading of the solution so you know the level of nutrient made available to the plants.
- PH and Temp measurement
- Selectable units for Celsius and Fahrenheit
- Backlit LCD display
- Double junction probe
- Successful calibration indicator
- Hold function
- Low battery warning
- Fully waterproof
- Auto off function
- Automatic temperature compensation