HM Digital is a leading supplier of water testing equipment around the world. We have included five test meters in our range. These hand held meters fit the needs for most requirements for hydroponics, aquaponics and aquarium applications.
NOTE: Each PH-80 is shipped with the sponge in the cap dry. Prior to use, pour a small amount of storage solution from the mylar packet into the sponge so that the sponge is moist. (not dripping wet) Put the cap back on and allow to soak for 15 minutes (standing upright) prior to use. Additional electrode storage solution is available for purchase.
Suits all HM Digital pens above