40 cfr 60, PS-1 compliant Opacity Monitors in Meriden, CT

EMS has taken the approach to design our products with accuracy, reliability, and serviceability in mind. Our EPA-compliant monitors are built with the highest-quality optics available and are matched with an industry-leading warranty and support. Our EPA-compliant opacity monitors are guaranteed to exceed EPA 40 CFR 60 Performance Specification 1 for opacity monitors as well as ASTM D 6216.

EMS EPA-compliant opacity monitors are designed to be the optimal choice for a variety of applications. From power-generating facilities to paper mills and cement plants, customers worldwide have relied on our monitors for more than 20 years to accurately monitor their processes.

EMS422 System


  • 40 CFR 60 PS-1 & ASTM D 6216 Compliant
  • Meets PS-11 Requirements
  • RS485, Modbus Communication, Optional Ethernet & Wireless
  • Dual-Beam Measurement
  • Lifetime LED-Source Replacement Warranty
  • Intuitively-Designed 5.7” Color Touch-Screen User Interface
  • 5 Numeric 3 Trend Display Choices
  • Real-Time Diagnostics for Testing Outputs & Relays
  • Automatic or Manual On-Line Calibration
  • Standard SD Card for Data & Program Backup
  • Easy-to-Read Color-Coded Fault Screen
  • User Display Customization Available


EMS510 System


  • 40 CFR 60 PS-1 & ASTM D 6216 Compliant
  • Dual-Beam Measurement
  • Automatic & Manual On-Line Calibration
  • Measurement Output -5 to 99% Opacity
  • 3 User-Selectable Displays
  • Modulated LED-Light Source with 8-Year Warranty
  • Field-Proven Reliability with Low Maintenance
  • Communications via RS485 MODBUS
  • Immune to Ambient Light


Contact us in Meriden, Connecticut, for more information about how we are able to make sure your company is remaining compliant with local health, safety, and environmental laws.