BlueLab: Soil Ph Pen

The Bluelab BLU2216 soil pH pen reads the pH and temperature of soils and media, helping you maintain the correct concentration of nutrients and temperature for successful grows. This waterproof pH pen measures temperatures in Celsius and Fahrenheit for your convenience, with a range of 0 to 50 degrees Celsius and a range of 32 to 122 degrees Fahrenheit, while the easy-to-read LCD display makes monitoring your plants quick and easy. Comes with one AAA alkaline battery.