Stressometer
The Stressometer is used to measure the amount of Stress on a shaft. This stress is the "load" of the system.
Usage

The stressometer is a block. It need to be placed between a shafts or a shaft and a machine. The amount of stress is shown by a hand on the face of the block. The higher the hand is, the more stress there is in the system. You can get more precise information such as current and max stress by using Engineer's Goggles.