accurate water testing solutions that meet the demands of professionals in hydroponics

Why Calibrate Regularly

EPA-certified for virus

this probe features a 3-meter (9

3000 hours of continuous use (batteries included)

Bluelab pH 4.0 Calibration Solution – 250 ml / 8.4 fl oz water quality bench meter accurate water testing solutions thatpH 4. 0 calibration solution a must in every grower's toolbox Contains 1 bottle 250 ml 8. 4 fl oz Boost your pH products longevity with regular cleaning and calibration Bluelab pH 4. 0 Calibration Solution ensures accurate pH meter readings with lab grade precision. This 250 ml bottle delivers consistent calibration for refractometers, pH meters, and water quality testing equipment. Essential for maintaining measurement accuracy in hydroponic systems,