Wartsila’s User Group › Forums › General › SCR Diff Press Monitoring This topic contains 1 reply, has 2 voices, and was last updated by service3000 4 weeks ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts December 17, 2018 at 2:36 pm #1943 cholmParticipant 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 service3000Participant 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.