You can use two very short scripts to gather information on the Powershell Sessions which execute your custom scripts on your computer.

Create a 'ps1' file in your Custom Sensors Folder of PRTG and enter this line:

write-host $Host.Version.Major,":OK ",$Host.Version.Major,".",$Host.Version.Minor

Create a Custom Sensor using the scriptfile you have just created. The script will return the version number of Powershell when executed.

To determine if the Powershell Session runs in a 32bit or 64bit environment create a script containing the following lines:

  if ([System.IntPtr]::Size -eq 8)
    {
      write-host 64,":64bit Session"
    }
    else
    {
      write-host 32,":32bit Session"
    }

Create an EXE/Script sensor for the script you just created, and it will return the environment of the Powershell Session.