Bluelab pH 4.0 Calibration Solution

Keep a pH 4.0 calibration solution handy without carrying a larger bottle. This single-use sachet is easy to tear open when it is time to calibrate or store your probe.

• One 18 mL (0.6 fl oz) sachet
• Quick tear-open packaging for on-the-go use
• Calibration and probe storage solution

Slip the sachet into your testing kit so it is ready when you need it.