Density Meter: This meter measures the density of the gas inside the ideal gas container. You must attach the density meter to a red hotspot on the container (see Container (Ideal Gas)).

Only the probe connects to the hotspot on the container. The meter itself appears to the left. You can move the meter, but you cannot delete it. To delete the meter, you must delete the probe.

You must place a density meter to plot density using the graph tool.