Described herein are arrangements and methods for achieving intrinsic safety for a radio transmission module. One aspect provides an apparatus for transmitting signals in an explosion-hazardous area with intrinsic safety, including: a radio transmission module having a high frequency module and an electronic control circuit disposed on a printed circuit board, said electronic control circuit being configured to control a voltage supply to the high frequency module in response to one or more of: output voltage of the high frequency module exceeding a predetermined voltage value, as independently measured by at least two independently operating hardware circuits; and a temperature of a heat-conducting potting compound potted over heat generating components disposed on the printed circuit board exceeding a predetermined temperature value, as independently sensed by at least two independently operating temperature circuits. Other embodiments are described.