Bluelab pH 4.0 Calibration Solution 20 ml Sachets (25/Cs)

$1.88 $1.51
SKU: HGC732903

pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pHÿinstruments areÿcalibrated to pH 7.0 first (buffer)ÿthen to pH 4.0 (slope). Bluelab's EC/CF equipment does not need calibrating, as they are all factory calibrated. The CF27.7 (EC2.77)ÿsolution is used as a reference or checking solutionÿto ensure you have adequately cleaned the EC/CF probe. Sachets are sold in boxes of 25 pieces.

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