Elevator Gauge
Have you ever seen those signs that mark the weight limit on elevators? It says a certain amount of people is the limit, but sometimes there can be more people than it states. Another marking says a weight limit, but how can we tell how much weight is in the elevator? Here is another design made to show how much weight is inside.
The image shows a person and a glowing red bar inside that person. Now that marks the amount of weight inside the elevator. However, once the red bar reaches the max, the elevator won’t budge indicating that it is too heavy.