If that physical property is weight, you can use what is known as a load cell. [DegrawSt] uses four 50 kg load cells to create a bathroom scale using an Arduino.

Industry pioneer CMC Rescue announces the release of its Enforcer Load Cell Kit, the only load cell UL certified to NFPA 1983, General Use. The Enforcer is a lightweight, compact device that ...

Using the ever-popular Arduino Uno, the feeder is connected to a platform that uses load cells to detect the pet’s weight. The weight data is then used to identify which animal is looking for food.

The bundle with the Gran Turismo rim, load-cell triple-pedal set and force feedback Boost Kit (to unlock the full 8 Nm the CSL DD is capable of) is currently priced at $970, with pre-orders live ...