Extending IRIS Health Monitor with custom health monitor sensors

IRIS Health Monitor is part of System Monitor (see here).

The intention is to further process the captured sensor reading in order to identify the "health" of a system by checking the sensor reading values against pre-defined Base, Min and Max absolute values, and alert accordingly. Additionally,  instead of absolute values, you can create Charts (which can be different for different periods of a day), that contain a learned minimum and maximum value after a time spent by the system (at least 24 hours) analysing sensor readings.

The sensor readings included in Health Monitor are defined here.

The question I am posing is, - Is it possible to create user-defined, sensors (in the same way as you  can using Application Monitor), to be included within Health Monitor (which can be added to a Chart where there is no absolute Base, Min and Maximum values pre-defined) ?

Thanks - Steve