Hold the pH probe in place and secure with the suction cup in a nutrient solution tank or reservoir.
Protect your pH probe from damage by securing it with this nifty probe holder. Simply slide up the barrel of the probe stem and place onto the inside of a tank or reservoir.
As you know, pH probes are fragile as they have an internal glass stem and a glass bulb on the tip of the probe. A few dollars is all it takes to ensure a longer life from your pH probe.