Flue gas analyzer gets close to the source

Sensor design allows placement in high-temperature zone for accurate readings while maintaining long operational life with minimal maintenance.


Michell Instrument’s XZR-500

The XZR-500's sensor design operates in high-temperature locations.

Michell Instrument's XZR-500 flue gas analyzer reduces installation and operating costs with its innovative Metallic Sealed Reference Sensor (MSRS). Operating reliably at temperatures up to 1,500 °C (2,730 °F), the company says its analyzer's semi-in-situ design makes it easy to install, simple to operate and economical to maintain.

Designed for applications such as boiler combustion efficiency and industrial waste incinerators, the XZR-500 provides simplicity of installation and fast response of an in-situ analyzer, combined with the long sensor life of an ex-situ analyzer.
With its MSRS sensor, the XZR-500's temperature range allows it to be installed close to the radiation zone. Taking the measurement in this high-temperature location gives reliably accurate readings before there's a chance that ambient air leakage farther downstream can contaminate the sample gas resulting in false readings.

MSRS technology is based on a sealed metallic reference allowing air to be used as a calibration gas which reduces installation and maintenance costs. If sensor replacement is needed, it can be performed within minutes without interrupting the process.

Michell claims a longer sensor lifespan than zirconia-based analyzers, even in dirty applications. Where soot is a problem, such as coal-fired power stations, the MSRS cell can be combined with a particle blow-back mechanism to maximize reliability.
-Edited by Peter Welander, process industries editor, PWelander@cfemedia.com,
Control Engineering Process Instrumentation & Sensors Monthly
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