Qinlorgo Pressure Sensors Display Module, 32x62.6x11mm Copper Clad Laminate Ultra Thin Flexible Pressure Sensitive Film Pressure Sensor + Pressure Display Module

If you need a way of measuring pressure without worrying about calibration, this is a nice little affordable tool. I used it for relative measurements, comparing between devices and prototypes that didn't need to be super precise. For that purpose it works very well and is sufficient. I couldn't find any other tool that easy and in that price range.

Works flawlessly, just wish had more features

I bought this on a whim for work where we wanted to approximate the pressure applied from a clamp.The minimum I could get this to read was 200 g and maximum is 26kg. It is supposed to have a 0-5000 g range. Comparing this to a calibrated scale, generally I found it was reading between 4 and 5 times the weight actually applied (starting at 4x and scaling to 4.9x by the maximum applied). So it's really inaccurate. But it is cute, the display shows the "pressure" applied, and it has a battery indicator (USB-C charge), and max reading which is very handy.. I don't know what you'd use it for given the lack of accuracy, but it is a nice little gadget.