Wartsila’s User Group › Forums › General › SCR Diff Press Monitoring This topic has 1 reply, 2 voices, and was last updated 4 years, 3 months ago by Anonymous. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts December 17, 2018 at 2:36 pm #1943 AnonymousInactive Are any of you required to measure emissions module (SCR, Ammonia Slip, OXI) differential as an air permit condition. And if you do not, what emissions are you monitoring continuously such as VOCs etc. Thanks. February 25, 2019 at 5:01 pm #1966 AnonymousInactive We do that on many plants across the USA – Please give me a call @ 8174751684 – Warm regards, Sebastian @ Service 3000 Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In