I'm looking for pressure sensors up to 22 kg and more. So far the highest capacity I could found was 25 lbs. Do higher ones not exist?
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Why do you need to measure such a high pressure?– Ignacio Vazquez-AbramsCommented Jun 10, 2014 at 20:29
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1Use a lever to reduce your force. If you have a 4 foot lever, with a pivot on one end, and your sensor under the other, if you apply 10 pounds of force 1 foot from the pivot, you will get 2.5 pounds of force at on the sensor. This is how bathroom scales work to measure large loads with a small sensor.– Connor WolfCommented Jun 11, 2014 at 9:41
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2Yes, they exist - do a search for "load cell"– Chris StrattonCommented Jun 11, 2014 at 16:59
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1 Answer
Your problem may be that you are using sub-optimal search terms. The kilogram is not a unit of pressure, but instead of mass. Scales technically do not sense mass, but instead sense force. This is assumed to be the force exerted by a resting body under earth gravity. Pressure is force over an area, such as pounds-per-square-inch (PSI) or the Pascal which is a newton per square meter.
Anyway, the sensor you want is called a force cell. The nice ones are rated in newtons or kilonewtons, with a kg being equivalent to 9.8 newtons.
Here is a load cell that take up to 50 kg. http://www.phidgets.com/products.php?product_id=3135
Sources: http://en.wikipedia.org/wiki/Force
