HRSG Stack Moisture Analyzers for Combined Cycle Power Plants

Mount the analyzer in the stack or duct, connect power and output signals, perform initial calibration using the built-in system (MAC155) or reference standards, then monitor continuous readings via the analog output for process control and regulatory reporting.

MAC155 and MAC125 measure stack temperatures up to 1200°F as standard. An optional high-temperature configuration extends measurement capability up to 2400°F for extreme combustion applications in HRSG systems.

Accurate moisture measurement enables precise heat recovery optimization, correct NOx and SO2 emissions calculations, improved combustion control, and compliance with EPA continuous emission monitoring requirements, directly enhancing overall plant efficiency.

The MAC155 delivers 60 seconds or less to reach 90% of final value, ideal for real-time process control. The MAC125 provides 120-second response for applications requiring slightly less rapid feedback.

No. MAC Instruments' patented solid-state technology eliminates the need for compressed air, wet bulb techniques, chemicals, optics, or mirrors, significantly reducing maintenance requirements and operating costs for continuous 24/7 stack monitoring.

Yes. Both MAC155 and MAC125 feature NEMA 4X waterproof construction specifically designed for outdoor stack installation, providing reliable operation in harsh weather conditions with ambient temperature ranges from -40°F to 120°F with optional heating.