HM Digital pH Meter

New to our range of hydroponic accessories, the HM Digital pH pen is a reliable, robust pH meter that's an ideal upgrade from liquid test kits.

This easy-to-use PH pen has a clear LCD display giving readings to 0.1 on the pH scale with an accuracy of +/- 2%.

The pen features digital auto-calibration which makes it easy to calibrate using Buffer 4 or 7.

The HM Digital pH pen uses three 1.5V batteries (supplied with the pen) to give approximately 2 years of battery life.