Hydroponic Meter PRO Kit, All-in-One pH Pen, Interchangeable Probe

Hydroponic pH reader for water quality assessment to help monitor and maintain proper solution levels.
Measures acidity, alkalinity, EC, TDS, temp, and salinity of water for gardens, aquariums, pools, and more.
Replaceable sensor probe with sensitive glass membrane delivers instant pH readings with pinpoint accuracy.
IP-67 rated to be sealed from high-volume moisture, dust, and sand; can also withstand high levels of heat.
Includes KCL, 4.00 & 7.00 solutions with 12.88 mS & 1413 µS solutions for lab-grade precision.