Parse and convert string SNMP input

My SNMP provides some data in strings instead of floats:
$ snmpget -v1 -Cf -c public NAS-MIB::systemFreeMem.0

NAS-MIB::systemFreeMem.0 = STRING: “7519.2 MB”

Is there a way I could parse this data ?

I have checked ‘converter’ plugin (
as well as SNMP ‘conversion’ field parameter but those assume that string is a numeric value.

I am looking for something like regex input like:

Unless you have other suggestions ?

The best you could probably do today is use the regex processor to remove the " MB" section, and then use the converter to convert the remaining numeric string to a float. However, I worry that you might still have an issue if the units can change.