ASDX Pressure sensor for low cost electro-pnumatic circuit

[Richard Armstrong-Wood]

Hello,

I am trying to build the low cost electro pnumatic circuit https://softroboticstoolkit.com/low-cost-ep-circuit/assembly/components

I am looking for a ASDX sensor though they seem to be rather expensive in the £90 mark. Does anyone have any suggestions as to what sensor to use - or do I need to fork out the £90?

Many thanks,

Richard