Astralpool / Rolachem pH 7.5 Calibration Solution - 100ml, 200ml

AstralPool / RolaChem pH 7.5 Calibration Solution – 100mL & 200mL

Genuine AstralPool / RolaChem pH 7.5 calibration solution for checking and calibrating pH probes used with automatic pool and spa chemical dosing systems.

Supplied as a genuine AstralPool / RolaChem part, but the solution itself is a standard pH 7.5 reference buffer and is not brand-specific. It can be used to calibrate pH probes from other manufacturers wherever the calibration procedure specifies a pH 7.5 reference value.

pH probes can gradually drift from their correct reading due to normal use, contamination and ageing. Calibration against a known pH 7.5 reference solution allows the controller to compensate for this variation and maintain more accurate pH monitoring and chemical dosing.

Available Sizes

• 100mL – Fluidra / AstralPool Part No. 600116
• 200mL – Fluidra / AstralPool Part No. 600113

Suitable For

• AstralPool RolaChem pH probes and controllers
• RolaChem RC9 / RC 9 combined ORP and pH controllers
• RolaChem RP9 / RP 9 pH controllers
• Other brands of pH probe, controller, dosing system or handheld meter calibrated against a pH 7.5 reference solution

Use With Other Brands of pH Probe

pH calibration solution is a chemical reference standard rather than a branded consumable. What matters is the reference value the equipment is calibrated against, not the badge on the bottle.

If the manufacturer of your pH probe, controller or meter specifies calibration against a pH 7.5 solution, this product can be used. That makes it a semi-universal pH 7.5 reference suitable for a range of pool, spa and water treatment pH sensing equipment, not only AstralPool and RolaChem.

Please check the value your equipment uses. pH 7.5 is less common than pH 7.0, which is the reference value specified by many pH probes and meters. Some equipment also uses a two-point procedure requiring a second solution such as pH 4.0. Confirm the reference value stated in your calibration procedure before ordering.

Why pH Probe Calibration Matters

An incorrectly calibrated pH probe can cause the controller to display an inaccurate pH value. Because automatic dosing equipment relies on the probe reading when controlling acid or pH correction, an inaccurate probe can result in incorrect chemical dosing.

Regular calibration helps confirm that the displayed pH value accurately reflects the condition being measured and can also assist when diagnosing an ageing or contaminated pH probe.

RolaChem RC9 Calibration

For RolaChem RC9 systems, AstralPool's calibration procedure involves placing the controller into Manual Off, selecting MAINT > CAL > pH and calibrating the pH probe against the known reference solution.

When using calibration solution rather than pool water as the reference, the controller's Filter Pump calibration option should be set to NO. The measured value can then be adjusted to match the reference solution value of pH 7.5.

For other brands, follow the calibration procedure published by that equipment's manufacturer.

Product Details

• Reference value: pH 7.5
• Type: pH buffer / probe calibration solution
• 100mL Part Number: 600116
• 200mL Part Number: 600113
• Brand: AstralPool / RolaChem / Fluidra
• Application: pH probe and sensor calibration on pool, spa and water treatment equipment

Important: This is pH calibration solution. It is not ORP calibration solution and should not be used to calibrate an ORP/chlorine probe. It is not a pH increaser or reducer and should not be added to the pool or spa.