Bluelab pH 4.0 Calibration Solution Size:250 ml Try the Hydro Pack

Try the Hydro Pack

your safety is our priority

Same light intensity as a 1000-Watt double-ended high pressure sodium bulb

odor-proof and robust

Bluelab pH 4.0 Calibration Solution Size:250 ml Try the Hydro PackIf you want to improve your pH products accuracy and longevity, youll need to get into the habit of regular cleaning and calibration. Luckily, the easy to follow calibration process is the same for all Bluelab pH meters and pens. After cleaning your pH probe, youll need to calibrate it with pH calibration solutions at two reference standards 4. 0 and 7. 0 pH. Once calibrated, you can start measuring pH again immediately. Youll need to recalibrate