Buffer solutions for accurately checking and calibrating your pH meters, available in pH4 and pH7 some meters use a one point calibration and normally only require pH 7 others such as the Bluelab ph meters require a two point calibration for a more accurate reading.
As always if you need any help calibrating your ph meters or a demo to show you how its done feel free to call in and we will be more than happy to help anytime.
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