how to get data from digital flow/pressure/level/temperature controller or indicator using xbee?

i am working on different digital type meter of flow/level/pressure/temperature controller or indicator which are used in industries…i dont know how to interface any controller or indicator of this type to xbee to get wireless data…so help me please…thank you

The XBee would only act as a transparent cable between the two devices. That is, get it working on an RS232 link. Then add the radios between the two ends of the RS232 cable.