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#1  

What do you class as cheap?

And, generally these sensors are I2C (that I've seen anyway), be sure that there is decent information on how to use them before you buy.

https://proto-pic.co.uk/ do quite a lot of sensors etc. it's probably worth taking a look there. The main problem I've found is that a lot of what people suggest on here ends up costing too much with shipping to the UK added on top, and then duty etc. Proto-pic are UK based (it's where i got my h-bridge from)

Sorry it's lacking any actual part numbers or references but hopefully it's of some use to you.

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#2  

Places to look is great I've seen alot ranging high up in the 3 digits. I've read alot and agree. But I don't need anything too expensive. So thanks for that