Designing a high temperature high pressure mesh sensor

A 16-transmitter, 16-receiver prototype sensor has been constructed for a DN80 pipeline; its individual components and some assemblies thereof have been tested in an autoclave at temperatures up to 285 °C in a liquid water-vapor environment with boiling at saturation pressure. Furthermore, a test section construction has enabled the sensitivity of the sensor to temperature changes via the variable electrical conductivity of deionized water as a function of temperature to be investigated.