Bluelab pH 4.0 Calibration Solution Sachets – Box of 30 (18 ml Each) housing wrench Specially designed for hydroponic

Specially designed for hydroponic

* 1°Oe is roughly equal 0

Other HM Digital controllers and monitors requiring 1000 ppm NaCl calibration

Long-Format Design — ergonomic long body lets you mix and measure nutrient reservoirs simultaneously

It can also be used for testing water filtration and purification systems

Bluelab pH 4.0 Calibration Solution Sachets – Box of 30 (18 ml Each) housing wrench Specially designed for hydroponicAn easy way to keep your pH and EC probes or pens accurate and working at their best Features: Easy to open single use sachets of calibration and storage solutions Quick tear open sachets are suitably sized for on the go calibration and probe storage Contains 30x 18 ml 0. 6 fl. oz. sachets Bluelab Sachets Perfect for lab technicians, growers, and water quality professionals who need reliable, portable calibration solutions. Each sachet delivers