Tubel has wireless pressure/temperature downhold guages for frac & production monitoring.
The Guages communications can be short hop or real time.
Tubel is involved in R&D, manufacturing and deployment of wireless downhole gauges for frac and production applications. Tubel wireless pressure systems provide data before, during, and for 3 years after the frac. It operates at 260°F and 18,000 psi. Up to 256 Tubel frac wireless gauges can be deployed in the horizontal section of the well.
Tubel Energy provides a real time wireless gauge using acoustic waves for communication from downhole to the surface. No cables required in the well.
http://www.tubelenergy.com