Housed in a water-resistant case, the Gro’Chek pH Meter by HANNA Instruments was originally designed for the greenhouse and hydroponics industry where the need for a low cost continuous indicator was established. However, the HI 981401N has proved popular with anyone who wants to have a constant readout of pH and is widely used in aquariums and fish ponds, swimming pools and even the dairy industry.
Easy to use, just hang the Gro’Chek Water Resistant pH Indicator above the sample to be monitored. Includes a 2-meter (6-1/2 feet) electrode cable and a gel-filled pH electrode that has been specially designed for indoor growers. Its design guarantees greater clogging resistance in fertilizer solutions with high concentrations of nutrients such as phosphate and nitrate.
Each Gro’Chek pH Meter ships complete with with a pH electrode, stainless steel grounding bar, pH buffer solution sachets, a calibration screwdriver, 12-volt adapter and instructions. Warranty: 2-years (six months on electrode).
Instruction Manual – PDF format
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all times. Also, To prolong the electrode life, after switching the meter off, remove the electrode from the nutrient solution.