Bluelab pH 4 calibration solution

Product detailed description

Acidic calibration point for precise pH measurement

Accurate pH measurement depends on calibration – and the Bluelab pH 4.0 solution is its acidic reference point. Together with the pH 7.0 solution, it forms the two-point calibration that Bluelab pH metres and pH pens require to provide correct readings throughout the entire cultivation cycle. Without fresh solution, the device's accuracy gradually drifts and measurements no longer reflect reality.

Compatibility

The solution is intended for all Bluelab pH measuring devices – pH pens, pH metres, and control units with pH probes. The acidic pH 4.0 point is combined with the neutral pH 7.0 point during calibration. Choose your calibration device in the pH metres category.

Available sizes

• 20 ml
• 250 ml
• 500 ml

Specifications

• Type: pH calibration solution
• Value: pH 4.0 (acidic point)
• Use: two-point pH calibration (with pH 7.0 solution)

Frequently asked questions

Why calibrate with two solutions?

Two-point calibration sets the device at two known points – acidic pH 4.0 and neutral pH 7.0 – ensuring accuracy across the entire range you measure during cultivation. One point is not sufficient for reliable measurement. Therefore, always use the pH 4.0 solution together with the pH 7.0 solution.