Are these any good for a brew fridge if so do I need any thing extra to go with them or is its easier to buy one of the other type ? https://www.amazon.co.uk/gp/aw/d/B01423VN6A/ref=mp_s_a_1_19?ie=UTF8&qid=1494459129&sr=8-19&pi=AC_SX236_SY340_FMwebp_QL65&keywords=inkbird&dpPl=1&dpID=41-ULTSS1JL&ref=plSrch edit if it takes I bit of tinkering I don't mind I love building stuff.
I like my water with barley and hops
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1. A PID controller wouldn't be necessary for a brew fridge.
2. It wouldn't work because there's only one circuit so you wouldn't be able to turn the fridge on when too warm, the heater when too cool, it would be one or the other.

If you want to self-build you need one of these
In addition you need wiring and connectors, a box to install it, a plug, two sockets - one for the fridge, one for the heater.

You might find it easier to get one of these, unless you want to use a brewpi or something


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Get one of the 300 series J, I have done both and they all worked great but I wouldn't be arsed with the hassle of building another stc1000 again when the total cost with parts is going to be pretty close
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i use this type.. 


i just tape the probe to the side of the fermenter, never had any issues.. i guess you could put the probe in the wort to be super accurate but ive not needed to
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