Monitoring systems and methods for monitoring one or more parameters within process equipment are disclosed. A monitoring system for wirelessly monitoring the process equipment can include a number of wireless sensors disposed within a fluid or gas process stream for monitoring various aspects of the fluid or gas medium such as temperature or pressure. Each of the wireless sensors can include a transmitter that can be used to wirelessly transmit sensor signals to a receiver in communication with a central monitoring unit. The wireless sensors can be placed directly within the fluid or gas medium, allowing accurate measurements to be taken within the process stream.