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thanks anyway mate

ill get in touch with the supplier.

im in England

Damn!

I never got one with mine!

I take it i will need this to calibrate my redox probe?

Thanks

I never recieved this with my redox probe. Should it have come with it? in the same box?

or did i have to pay for this seperately?

I am about to calibrate my redox probe but am wondering what the null plug is?