getting multiple counters with get-counter ?

Just trying to get a handful of counters for sql server monitoring.  but is there any way i can export-counters all  into 1  .blg file or am i not getting this ?  do they have to be in the same set i guess is the question.

Counters like :

Get-Counter "\\$computer\processor(_total)\% processor time"

Physical Disk: Average Disk/sec Reads

Physical Disk: Average Disk/sec Write

SQL Server: Memory Manager >> Free List Stalls/sec

      SQL Server: Memory Manager >> Memory Grants Pending

thanks,

Chris