Hydro-Trans Thermal Conductivity Transmitter
Process Online Gas Analyzer
The Hydro Transmitter from Roscid Technologies sets the standard for thermal conductivity detector-based applications within the process control industry. As a rugged transmitter, packaged in a weatherproof housing, the Hydro Trans is suitable for use in harsh, hazardous outdoor environments. Using a novel, solid state thermal conductivity sensor, this cost effective transmitter can be configured to detect H2, He, N2, Ar, CO2 or several other gases of interest in binary or multi-component sample gas mixtures.
The sensor structure consists of an integrated heater located on a thin electrical and thermal insulating membrane. Two thin film resistors are used for heating and measuring the temperature of the membrane. Two resistors are integrated on the silicon beside the membrane for the compensation of the ambient temperature changes. Gases which have a lower density than air (CH4) cause a decrease on the surface membrane temperature. On the other hand, gases with densities heavier than air (CO2) increase the temperature of the measuring resistor.
