Essentials pH 4.01 buffer - 250ml Necessary to calibrate pH & EC/CF meters, for super accurate calibration use these solutions at 25 degrees centigrade and never keep an opened bottle for more than 6 months. £2.99
Essentials pH 4.01 buffer - 1 litre Necessary to calibrate pH & EC/CF meters, for super accurate calibration use these solutions at 25 degrees centigrade and never keep an opened bottle for more than 6 months. £9.99
Essentials pH 7.01 buffer - 250ml For super accurate calibration use these solutions at 25 degrees centigrade and never keep an opened bottle for more than 6 months. As well we offer pH electrode storage/refill & cleaning solutions. £2.99
Essentials pH 7.01 buffer - 1 litre For super accurate calibration use these solutions at 25 degrees centigrade and never keep an opened bottle for more than 6 months. As well we offer pH electrode storage/refill & cleaning solutions. £9.99
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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