ISA Solartron (Ametek), UK
They are a manufacturer of Multiphase Wet Gas Well Head Meters specifically designed for Gas/Condensate Applications & primary flow elements like venturi tubes, orifice assembly etc.
Wet gas meters – Models Dualstream 1, Dualstream 2 .The DS1 is typically used for very high GVF 98% to 100%, and the DS2 is typically used for a wider range of 90% to 100%GVF.
Both technologies are non-radioactive and use our proprietary Pressure Loss Ratio (PLR) algorithm to accurately measure the 3-phase fractions of gas, condensate, and water. The meters also use simple instrumentation so are ideal for unmanned and remote locations.