Multi-Part Gauge
You can use amCharts Gauge Chart to display multiple discreet values in one gauge. One way to do that is using multiple axes overlapping in a common space. The other is to have the parts occupy separate sections of the gauge.
Key implementation details
To create the axes for each quarter of the circle we create them using AxisRendererCircular renderer with startAngle and endAngle set to the specific section angles. Then we just create clock hands associated with each of the axes.
Related tutorials
Demo source