
MAC155 Moisture Analyzer
- Built-in 2-point calibration system
- Ultra-high temp to 2400°F optional
- 60-second response time


NIST-Traceable Certified
EPA Compliant
NEMA 4X Rated
MAC Instruments offers advanced flue gas moisture analyzers designed for precise NOx and SO₂ emission correction in industrial applications. Our MAC155 and MAC125 systems feature patented solid-state sensors that deliver accurate, real-time moisture measurements in extreme temperatures up to 2400°F. With NEMA 4X weatherproof construction and no compressed air or wet bulb requirements, these analyzers ensure EPA compliance and continuous emission monitoring across power generation, cement manufacturing, and metal processing facilities worldwide.


How do you measure moisture in gas?
MAC Instruments uses patented solid-state humidity sensors that directly measure water vapor pressure in gas streams without wet bulbs, mirrors, optics, or compressed air, providing accurate real-time readings.
What is the purpose of a flue gas analyzer?
What temperature range can these analyzers withstand?
How often do these moisture analyzers require calibration?
Can these analyzers be installed outdoors?
What industries use flue gas moisture analyzers?
How quickly do these analyzers respond to moisture changes?
Talk to our experts for custom solutions and tailored guidance.

Continuous moisture monitoring in coal, biomass, and natural gas boiler exhausts for EPA compliance and combustion efficiency optimization.

Flue gas moisture measurement in cement kilns and clinker coolers for emission correction and heat recovery optimization.

High-temperature moisture analysis in steel plant stacks, annealing furnaces, and heat treatment operations for process control.

Recovery boiler and paper dryer exhaust moisture monitoring for regulatory compliance and energy efficiency in pulp manufacturing.
Talk to our experts for custom solutions and tailored guidance.



Over 30 years leading high-temperature moisture measurement technology with patented solid-state sensors that operate reliably in extreme conditions up to 2400°F without compressed air or wet bulb maintenance.
NIST-traceable accuracy and built-in calibration systems ensure continuous regulatory compliance for NOx and SO₂ emission monitoring with minimal downtime and complete documentation support.
NEMA 4X/IP53 rated enclosures withstand harsh outdoor environments while delivering consistent performance 24/7, reducing maintenance costs and extending equipment lifespan in demanding industrial applications.
Our technical team will help you select the right analyzer for your emission monitoring requirements. Expect detailed product recommendations and quote within 24 hours.
For immediate assistance, feel free to give us a direct call at 419.621.2322 You can also send us a quick email at info@macinstruments.com
For immediate assistance, feel free to give us a direct call at 419.621.2322 You can also send us a quick email at info@macinstruments.com