![](https://cdn.bfldr.com/Q3Z2TZY7/at/ggh7qm379mqjrz53scv65n8/Generic_Industry_-_mining_-_photo-1584844654932-1b5c8b11fef1.jpg?auto=webp&format=png&auto=webp&width=320 320w,
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https://cdn.bfldr.com/Q3Z2TZY7/at/ggh7qm379mqjrz53scv65n8/Generic_Industry_-_mining_-_photo-1584844654932-1b5c8b11fef1.jpg?auto=webp&format=png&auto=webp&width=768 768w,
https://cdn.bfldr.com/Q3Z2TZY7/at/ggh7qm379mqjrz53scv65n8/Generic_Industry_-_mining_-_photo-1584844654932-1b5c8b11fef1.jpg?auto=webp&format=png&auto=webp&width=1024 1024w,
https://cdn.bfldr.com/Q3Z2TZY7/at/ggh7qm379mqjrz53scv65n8/Generic_Industry_-_mining_-_photo-1584844654932-1b5c8b11fef1.jpg?auto=webp&format=png&auto=webp&width=2048 2048w)
Opacity monitors
![](https://cdn.bfldr.com/Q3Z2TZY7/at/85rjw5xhn9rhs7kb3jcsks6/Generic_Industry_-_Plant_chimneys2.jpg?auto=webp&format=jpg&orient=h)
![](https://cdn.bfldr.com/Q3Z2TZY7/at/wvgf7gbjcns85vgxbfqmvqtt/Generic_Industry_-_Manufacturing_plant_outside_smoke_-258786_1920.jpg?auto=webp&format=jpg&crop=16:4,offset-x50,offset-y50)
Our continuous opacity monitoring equipment range
We offer three different continuous opacity monitors to suit various conditions and budgets:
- Acoem DSL 320 — Double pass monitor that measures the visible opacity of exhaust gas passing through a duct, stack or flue from an industrial process or air filtration system
- Acoem DSL 220 — Single pass monitor that measures the visible opacity of exhaust gas passing through a duct, stack or flue from an industrial process or air filtration system
- Acoem DSL 460 — Double pass opacity monitor for measuring the visual opacity and/or concentration of dust and particulate emissions
![](https://cdn.bfldr.com/Q3Z2TZY7/at/5xjv3ffhgnvw3499z9tcnfx/Generic_-_trusted-partner.png?auto=webp&format=png?auto=webp&width=768)
See it in action
Learn more or schedule a demo.