The AD250 is a new generation acoustic telemetry system that measures wellbore pressure in real time in oil & gas wells, a mandatory requirement for good reservoir management. The downhole gauge has a transmission range of approximately 2000m in a free flowing well environment, and approximately 2500m in a quiet well environment such as an observation well. The AD250 system is ideal for ESP, PCP, SRP, Jet pump, Gas Lift, free-flow or observation wells in this depth range.