Rosemount QX1000 hybrid continuous gas analyser

The Rosemount QX1000 Continuous Gas Analyser is designed for use in continuous emissions monitoring systems (CEMS), among other applications. It uses paramagnetic detection for O₂ and quantum cascade laser direct absorption spectroscopy for all other gases to meet stringent performance requirements. This integration of different technologies and a modular approach are designed to provide a flexible, single-system solution tailored to diverse application needs.

The QX1000 uses cold/dry technology, with a sample conditioning system transporting gas extracted from the process to the analyser through a thermoelectric chiller to reduce the temperature to about 4°C so most moisture condenses and drops out. Users can integrate the QX1000 into existing plant infrastructure, or it can be provided as part of an integrated Emerson system solution, including the sample conditioning system.

Measurements made by the QX1000 are suitable for CEMS applications due to the analyser’s high selectivity and accuracy. CEMS are required at most sites with a stack emitting gases to atmosphere, and they are widely used in chemical, oil and gas, power generation, pulp and paper, refining, water/wastewater and other industries.

Leveraging the intrinsic high selectivity of laser-based measurement, the analyser provides monitoring of complex gas streams while delivering continuous, real-time data. Off the shelf, it supports measurement of key regulatory gases, including CO, CO₂, O₂, NO, NO₂, and SO₂, with different configurations typically offering detection of one to four gases. Measurement of additional gases, such as CH₄ and N₂O is also available.