Equipment Return & Factory Service
Need an RMA number?
Submit the online Customer RMA Request before shipping equipment to EMS.
Opacity Monitor Service & Support
Environmental Monitor Service provides factory and field service for EMS opacity monitors and systems from many other manufacturers. Our experienced service engineers support industrial facilities with repair, startup, certification, regulatory audit testing, preventive maintenance, and emergency troubleshooting.
Service can be coordinated around planned outages and shutdowns. Whether you need an in-house repair, an on-site technician, or a complete replacement recommendation, EMS will help identify the most practical path forward.
In-House Service
- Opacity monitor diagnostic testing and repair
- Complete system overhaul and cleaning
- Factory calibration and recertification
- Optical alignment and performance verification
- Neutral density filter sales and NIST-traceable certification
- Replacement parts and system-upgrade recommendations
Field Service
- Opacity monitor startup and commissioning
- PS-1 field certification and documentation
- Quarterly and annual PS-1 audit testing and reporting
- On-site troubleshooting and repair
- Preventive maintenance, cleaning, and alignment
- Procedure 3 off-stack zero testing
- Planned-shutdown and emergency service support

Service and Replacement Support for Multiple Brands
EMS services its own equipment and can evaluate, repair, or replace many legacy and current opacity-monitor systems, including:
- DURAG opacity monitors
- Rosemount OPM 3000, OPM 4000 and OPM 4001 parts, repair and replacement — EMS was the original equipment manufacturer
- Preferred opacity monitors
- LightHawk opacity monitors
- Phoenix Instruments opacity monitors
- Teledyne opacity monitors
- USI opacity monitors
- Fireye opacity monitors
- AMETEK Land opacity monitors
- Datatest opacity monitors
- Other manufacturers and discontinued systems
Provide the manufacturer, model, symptoms, and available photographs when requesting service. EMS can help determine whether repair, overhaul, or replacement is the best option. For additional guidance, see how to choose an industrial opacity monitor.
Opacity Monitor Service FAQs
Can EMS service opacity monitors made by other manufacturers?
Yes. EMS services its own systems and many competing or discontinued opacity-monitor models. Provide the manufacturer, model, and symptoms so we can evaluate the available options.
Does EMS perform PS-1 audits and certification?
Yes. EMS provides opacity-monitor startup, PS-1 field certification, and quarterly or annual audit testing and reporting.
Can service be scheduled during a planned shutdown?
Yes. EMS can coordinate factory and field service around planned outages and shutdown schedules.
Does EMS certify neutral density filters?
Yes. EMS manufactures and provides NIST-traceable neutral density filter certification for EMS and other opacity-monitor filter models.
How do I request emergency opacity monitor service?
Call EMS at 800-864-2814 or use the contact form and include the monitor model, site location, and problem description.
