Currently the gauge is bound to the selectedPumpRate field.
Thus when the selectedPumpRate is modified, the value of the widget is changed. However, the value of the gauge is the first pointer, therefore using the data-bind attribute you are able to modify only the value of the first pointer.
To modify the rest of the pointers you could use the pointer.value method.
gauge = $(
Below you will find a modified version of the sample:
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