Mini Load Cell - 500g, Straight Bar (TAL221)
This straight bar load cell (sometimes called a strain gauge) can translate up to 500g of pressure (force) into an electrical signal.
The load cell has four strain gauges that are hooked up in a wheatstone bridge formation. Additionally, it offers an IP65 protection rating and features four M3 sized through-holes for mounting purposes.
More information is available on the website of Sparkfun.