Bluelab Pens are one of the most convenient and reliable ways to measure your garden's pH, EC, or PPM. These small, fast handheld devices are very durable.
Whether you want to test your hydroponics reservoir or the soil in your outdoor garden, Bluelab pH and EC pens will get the job done accurately every time.
Want to see how to calibrate your pen? Check out our guide on how to calibrate a pH pen.