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Calibration Buffer pH7.00 500ml. Used for calibrating any pH meter. Colour coded so cannot be confused with any other solution in the vicinity once poured.
It is essential that all meters are calibrated at least weekly. Pour 20ml of buffer in a clean container and dip your pH stick/meter in the buffer covering the tip. Stir and wait 30 seconds for a stable result. Press the cal button and the job is done.
Always rinse the meters tip with water before measurement or storage. Discard used buffer down the sink. Dont worry its harmless!
