Questions about TFA PH Check

For the storage you need a KCl 3 mol solution, I got it from the pharmacy. For calibration I took pH 4 and pH 7 by Mettler Toledo, expensive, check for other providers.

According to the supplier: 'The 31.3001.06 can only be used for solutions. Therefore, it is unfortunately not suitable for your customer's intended use. If your customer wishes to check the product specifications in more detail, he can find them in the manual at the following link: https://com-tradebyte-core-tbone-media-live.s3.eu-central-1.amazonaws.com/media/1768/25873-61b766d6bddf4.pdf"

well i bought it for my pool but from my experience with soil ph for eg , it could be used if you just mix the soil sample with water and then test the ph of it . would be the same . even if your water is slightly off from PH7 you just test the water before you mix then add or subtract the corresponding value .

You find it in the user manual. You need at least ONE buffer solution e.g. pH 7. Depending on the pH-values you are checking, you might want to to a multiple metering point calibration.

yes, I need it exclusively for food such as doughs and liquids

Ex: Dennerle pH7 calibration solution I bought the following: [https://ch.elv.com/pufferloesung-7ph-250ml-063453

No, unfortunately not. Only pH value and temperature.