Passive RFID Datalogger

Hi everybody!
Basically I want to do a temperature datalogger, using a passive RFID and a Reader.

The passive RFID is connected to a temperature sensor. The Reader send an electromagnetic signal that activate the RFID and retrieve the data.

Do you think is possible? any suggestion on the components to buy? How do I connect the Microchip of the tag to the sensor?

Thanks!!

Why the need for to use RFID ? What range are you hoping to get ?

Because I need to to build the cheapest possibile datalogger, preferably batteryless or with a small one. So a passive RFID tag is first thing that I thought.

About the range 1/2 meter