HM Digital
HM Digital produces high quality water testing pens and meters for water treatment and purification. Dependable and reliable pH and PPM/TDS meters are used by gardeners worldwide.
Showing all 2 results
HM Digital produces high quality water testing pens and meters for water treatment and purification. Dependable and reliable pH and PPM/TDS meters are used by gardeners worldwide.
Showing all 2 results