esmer is the trade mark for PSL's multiphase flow metering products.

esmer stands for Expert System for Multiphase Measurement, a patented technology which combines conventional fluid mechanics and flow regime identification by means of neural nets.

esmer comprises:
  • esmerDual: Field unit with differential pressure and impedance sensors
  • esmerDigital: Software running on standard PC for signal processing, display and network connection; connects with esmerDual via RS485.

esmer has undergone an extensive range of laboratory and field trials since 1997. A number of esmer systems have been in use on-shore and off-shore well testing applications since 2002.