Environmental Monitor Service Inc. is a leader in the field of advance technology Opacity and Dust Monitor Systems. EMS' EPA Compliant Opacity and Non-compliant Opacity Monitors are guaranteed to exceed CFR 40, Part 60 Performance Specification 1 for Opacity Monitors as well as ASTM D 6216.

We offer a wide variety of models to fit every budget and suit any application. All of our monitors are set up and tested at the factory to meet the site specific dimensions that the customer has provided. This, along with our user friendly design assures a quick, trouble-free installation.

Since 1990, companies around the world have relied on EMS to monitor the amount of visible emissions, smoke, dust or opacity from their process. We hope that you will give us the opportunity to work with you on your next project and are confident that you will be satisfied with the performance and worry free operation of our monitors for years to come.

EPA Compliant Opacity Monitors
EMS EPA Compliant Opacity Monitors are designed to be optimal choice for a variety of applications.

Non Compliant Opacity Monitors
Our industry leading warranty and support make EMS Opacity Monitors an ideal choice for all of your opacity monitoring needs.

Dust Monitors
Our dust monitors are designed to fit any application and budget.

Audit Neutral Density Filters
EMS manufactures quality, precision neutral density filters for use in all of the most popular Opacity Monitors.