40 CFR 60, PS-1 Compliant Opacity Monitors

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 over 30 years.

EMS WatchDog PS-1

EMS WatchDog PS-1

  • 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 4.3” Color Touch-Screen User Interface
  • 5 Numeric 3 Trend Display Choices
  • Real-Time Diagnostics for Testing Outputs & Relays
  • Automatic or Manual On-Line Calibration
  • Easy-to-Read Color-Coded Fault Screen
  • User Display Customization Available
  • Optional Premium Controller


Contact us for more information about how EMS can assist your company in remaining compliant with local environmental regulations.”