Apera Instruments pH Calibration Solution 4.01/7.00 each 250 ml, AI1113

PH4.01 and pH7.00, each with 250ml Precise calibration: The accuracy of pH 0.015 allows highly accurate calibration Simple: using the colours can be recognised the right solution by the (PH4: Red; pH7: Green) Immediately use: Detach To Powder in distilled water instead of, you can immediately use the solution Long lifetime: up to 3 years shelf life.