RF module for control system

Hi all,

I need a pair of RF module (transmitter & receiver) for my embedded system project (control system for industrial machinery)
- operate at 600-900Mhz
- 20 - 30 meters range
- Easy interfacing with uC
- Slow bitrate would be OK (<4kbps)
- could resist with machinery noise

Any suggestion?

You can see some applications at:
h**p://www.melexis.com/prod_rf.asp
den