Environmental Monitor Service, Inc. products

The EMS WatchDog PS-1 opacity and dust monitor meets or exceeds EPA regulation 40 CFR 60 appendix B, PS-1, and ASTM D 6216. It is the definition of reliability, featuring an intuitive 4.3” color touch-screen, user interface, and long-life, EPA-compliant LED light source.

The EMS WatchDog is a dual-beam opacity monitor with a user-friendly, LED-backlit microprocessor remote control. It is designed to provide accurate, reliable process information for a variety of applications.

The EMS WatchDog 800 is a compact green LED source single-pass opacity monitor that is designed to provide accurate, affordable, and reliable process control information. This smoke density monitor features a path length of 2 to 15 feet (60-457 cm.).

Along with manufacturing our own neutral density filters, EMS offer industry leading recertification of any competitor’s model. Our filter certification service sets the standard in the industry for speed and cost. Contact us today for details. Environmental Monitor Service manufactures quality, precision neutral density filters for use in all of the most popular opacity monitors. Used for EPA audits and service, our filters are NIST traceable, fully certified, and manufactured with high-quality optical substrate material. Each filter has a unique serial number and comes with its own scanned trace which is dated and signed. The filters are labeled with the value in both optical density and opacity.