A selection of various ph buffers, ph buffers are used to calibrate ph meters, this needs to be done regularly to ensure you ph meter is reading correctly as failure to do this defeats the whole point of using a ph meter in the first place.
Essentials pH buffer 4 Essentials pH 4.01 buffer - Necessary to calibrate your digital ph meters and probes, this needs to be done often. £3.49
Essentials pH buffer 7 Essentials pH 7.01 buffer - 250ml & 1l For super accurate calibration of your digital ph meters and probes £3.49
Growth Technology ph buffer 4 Growth technology PH Buffer 4 is used to calibrate pH meters. This should be done on a regular basis to ensure ongoing accuracy from the meter. £3.49
Growth Technology ph buffer 7 Growth technology PH Buffer 7 is used to calibrate pH meters. This should be done on a regular basis to ensure ongoing accuracy from the meter. £3.49
HM Digital Ph Buffer Solution HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life. £9.99
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