Astralpool pH 4.0 buffer solution 50 ml – 60632

Astralpool pH 4.0 buffer solution 50 ml red 60632

Astralpool pH 4.0 buffer solution 50 ml red 60632 is a professional calibration liquid used to adjust and verify the accuracy of pH probes in swimming pool dosing systems and testers. With a stable reference value of pH 4.0, it allows controllers and handheld meters to be calibrated precisely, ensuring reliable pH readings and correct chemical dosing.

Main features of the pH 4.0 buffer solution

• pH 4.0 buffer solution in a 50 ml bottle for multiple calibrations.
• Red coloured liquid for quick visual identification during use.
• Stable reference value for accurate calibration of pH probes.
• Suitable for pool controllers, dosing pumps and portable pH meters.

Application and typical use

This pH 4.0 buffer solution is used whenever a pH electrode needs to be calibrated or checked, whether it is installed on an automatic pH controller, a salt chlorinator with pH module or a handheld meter. Using a fresh, reliable buffer ensures that the device displays correct values and that automatic dosing reacts properly to the real pH of the pool water.

• Calibration of fixed pH probes in automatic dosing and control systems.
• Verification and adjustment of handheld pH testers.
• Ideal for service technicians and regular maintenance on private pools.

How to calibrate with pH 4.0 buffer solution

Correct calibration depends on both the procedure and the handling of the buffer. The liquid must remain clean and close to the ambient temperature of the installation.

• Shake the bottle gently and pour a small amount into a clean calibration cup.
• Rinse the pH probe with fresh water and gently dry excess drops without rubbing the glass tip.
• Immerse the probe tip fully in the pH 4.0 buffer solution, avoiding contact with the sides of the cup.
• Wait for the reading to stabilise, then start the calibration procedure on the controller or meter.
• Confirm or adjust the reading to pH 4.0 according to the device instructions.

After calibration, discard the used buffer from the cup and rinse the probe with fresh water before returning it to the installation or moving to the next calibration point.

Why a pH 4.0 buffer is important

A pH 4.0 buffer solution is commonly used together with a pH 7.0 buffer in two point calibrations. The low pH reference ensures that the probe responds correctly in the acidic range, which is essential for accurate control of pool water around the ideal pH setpoint.

• Helps detect drift or loss of sensitivity in ageing pH probes.
• Improves the accuracy of automatic pH regulation and chemical dosing.
• Reduces the risk of corrosion or scaling caused by incorrectly adjusted pH.

Handling and storage recommendations

Proper storage and handling keep the buffer solution at its specified pH value for as long as possible.

• Always keep the bottle tightly closed when not in use.
• Store in a cool, dry place away from direct sunlight and heat sources.
• Do not pour used buffer back into the original bottle to avoid contamination.
• Mark the opening date on the bottle and replace it according to the recommended shelf life or if calibration behaviour becomes irregular.

By combining regular calibration with Astralpool pH 4.0 buffer solution 50 ml red 60632 and good care of the pH probe, automatic dosing systems and testers can deliver precise, repeatable pH measurements throughout the swimming season.