This white paper discusses the measurement problems caused by process fluids that contain bubbles of air or other gas, and describes how Micro Motion sensor and transmitter technology can be used to overcome those problems. This white paper also presents suggestions for minimizing measurement problems by improving application design. Although the most common term applied to this problem is entrained air, in fact the bubbles may contain any gas. This white paper uses the term entrained gas rather than entrained air in order to address the broader topic. Other frequently used terms include two-phase flow and slug flow.