The pH Measurement Probe for pH Regulator

What is a pH Regulator Analysis Probe?

The pool pH regulator is useless without its probe. To analyze the acidity of the pool water and transmit the data to the device, it is essential to install a probe – it is indispensable!

The Probe

The pH probe measures the pH level of the pool. It is a very thin glass membrane that contains one or two silver reference filaments and a filling solution. At one end is the "bulb" in contact with the pool water, and at the other end is a cable that connects the probe to the pH regulator.
The operating principle of the probe "is based on the difference in concentration of H+ ions on either side of a very thin glass membrane, generating a potential difference proportional to the pH of the solution in which the electrode is immersed."
The lifespan of a probe is about 2 years, depending on its maintenance and the pool's usage time: whether it's for a summer season or year-round. It is considered a "consumable" element of the pH regulator, similar to the transparent tube, as it needs replacement. The cost for a new probe is usually between 60 and 100 euros. Most often, it is supplied with a few meters of cable to connect it to the regulator's housing.

What are the Characteristics of the pH Regulator Probe?

The glass frame is fragile and requires delicate handling; shocks are fatal to it. To protect the probe until it is installed, its glass bulb (the end) is immersed in a protective flask containing potassium chloride. During winterization, the probe must be placed back into the solution, and thus, this flask must be retained.
The probe is connected to the pH regulator; it can be universal or dedicated to a specific device, and it is made of either glass or transparent PVC. The probe measures between 14 and 15 centimeters. Some can withstand pressures up to 6 bars. Thanks to the BNC connection and a cable of 2, 3, or 5 meters... A double junction probe has better resistance.
Most of the time, it is capable of measuring pH on a scale of 0 to 14. Depending on the models, the measurement accuracy can vary ± 0.01 pH, and the operating range is defined between 0°C and 50°C, 0°C and 60°C, or 0°C and 80°C...

Calibrating the Probe

Calibrating the pH probe is essential. It is done when installing the probe, once a year when restarting the pool, and if the consumption of the correcting liquid (pH) seems abnormal.
The pool filtration power is turned off. Calibration is done in 2 steps, following the instructions in the pH regulator user manual. Usually, the probe is first immersed in a flask of clean water, then removed, and excess water is eliminated by gently shaking the probe. Next, it is immersed in a flask of pH 7 standard solution for at least 30 seconds (follow the instructions) until the measurement stabilizes, then validate on the device. The probe is rinsed as before and immersed for 30 seconds in a pH 4 solution (follow the instructions). Rinse it one last time and place it in the probe holder or the analysis chamber.

The regulator's probe is an essential element for the device's operation. Ensure that it is perfectly operational and clean if you want the displayed measurement to be accurate, the pool water to be balanced, and to enjoy swimming without worrying about the constant pH fluctuations.

Discover in detail what a pool pH regulator is. Analyze the advantages and disadvantages of the pool pH regulator as well as the characteristics of the pH regulator to understand its operation.

An essential element of the pH regulator, learn how to install and maintain the measurement probe to avoid damage and ensure optimal performance.

Finally, to better understand what a pool pH regulator is and help you choose the right one, you will find below how the pool pH regulator works, how to choose the pool pH regulator, how to install the pool pH regulator, and how to maintain and winterize the pool pH regulator.