Selective Catalytic Reduction

The number of regions that regulate NH3 emissions, known as ammonia slip, are few, but the benefits of monitoring NH3 can be plentiful:

  • Cost savings of anhydrous ammonia
  • Decrease build up on air pre-heater
  • Lower contamination of waste solids.

To monitor NH3 slip, Thermo Fisher Scientific offers two main CEMS methods for process control and compliance applications:

  • Extractive dry basis with conversion at the stack
  • Dilution with NH3 conversion at the stack.
Learn more about monitoring solutions

We understand that every plant, facility, and customer is uniquely different. Our applications specialists are ready to speak to you regarding mercury emissions regulations and continuous monitoring solutions.


Extractive Measurement Dry Basis

The Thermo Scientific 42iQ Low Source NO-NO2-NOx Analyzer utilizes chemiluminescence technology to measure the amount of nitrogen oxides in the air from ppb levels up to 500ppm. This is ideal for direct extraction from gas turbines and boilers for power generation requiring a chiller to remove moisture and probe/NH3 converter at the sampling point.

  Specification Sheet: 42iQ NO-NO2-NOx Analyzer

Dilution Measurement Dry Basis

The Thermo Scientific 42iQ NO-NO2-NOx Analyzer utilizes chemiluminescence technology to measure the amount of nitrogen oxides in the air from sub-ppb levels up to 100ppm. This measurement range is optimal for use with dilution of 20:1 to 100:1 with no need for a chiller due to the clean, dry, dilution air. A converter in the probe converts all NH3 to nitrogen oxides for analysis.

  Specification Sheet: 42iQ NO-NO2-NOx Analyzer

environmental monitoring product support and spare parts

Product Support and Spares

Thermo Fisher Scientific Service Solutions are a vital component of your product’s lifecycle. These comprehensive solutions are exclusively created to drive optimal performance of your time-critical instruments.

When you partner with Thermo Fisher Scientific, you gain access to engineers trained within the same factory your instruments were manufactured. We only ship spare parts that were designed specifically for your instrument. Our expert service team is truly an integrated part of your product’s life cycle.

CMD SchemaApp code