There is actually an Operational Rule that does this, Operational Rules\Out of the Box\Inventory Management\Upload Screen Information. Simply assign this Operational Rule to your target devices and the data will show up in your Custom Inventory. The OpRule gathers the following information listed below.
Hope this help.
Thank you for the update, i was able to get required info.
Any clue what command or API is used to collect Monitor Serial number? as this rule is picking the data without using WMIC command. Any ponters please.