NH3 Monitoring and Detection

Appropriate and effective sensing is critical to Ammonia/Urea operations for process safety as well as health and safety. Speed and certainty of detection are vital for process control and timely mitigation of accidental release.

Immediately dangerous to life or health (IDLH) limits for ammonia are effortlessly monitored using either UV-DOAS (Ultraviolet Differential Optical Adsorption Spectrometer) or TDL (Tunable Diode Laser) technologies. TAS has designed, installed and continues to maintain over eight open path ammonia detection installations with over four paths each. Understanding a sensor’s characteristics is essential in designing and implementing effective ammonia monitoring and detection systems.

A number of sensor products and systems have been commercially developed for application in industrial environments such as ammonia/urea production.  Legacy ammonia sensors such as mass spectrometers and electrochemical detectors tend to have a high cost of ownership due to maintenance and calibration requirements. Optical ammonia sensors can be direct replacements for and improvements on these technologies with higher reliability and ease of use. Available optical ammonia sensors are based on different technologies, requiring different operational and use considerations.

Ammonia detection using UV-DOAS, TDL, and other emerging technologies continue to challenge the specificity of ammonia detection.  The wavelength used in spectroscopy to isolate the ammonia molecule is very close to water, thus causing false positive readings when looking for very specific levels of ammonia, such as the difference between 1 ppmm and 3 ppmm. However, TAS is making great strides in overcoming this challenge.

Planning and Implementation of NH3 Monitoring Systems

Careful evaluation and planning are key to determining what ammonia monitoring and detection equipment and methods to consider when applying optical sensing technologies in process and HSE applications. A successful implementation will include identifying the information needed, understanding the measurement and operations environment, determining measurement needs and methods appropriate for the application, and then working closely with manufacturer and engineering support to design, install, and transition equipment into operations with forward-thinking planning for appropriate use and maintenance.

Ongoing Support

TAS can be as involved or completely removed as necessary once your system is installed. We can provide training and complete handoff, or we can visit your site for regular preventative maintenance checks, usually once a year, and even occasionally provide free data analysis. Customer satisfaction is the lifeblood of our success.

Typical Applications for NH3 Monitoring Systems

  • Fenceline Ammonia Monitoring
  • Health and Safety Ammonia Monitoring
  • Open Path Ammonia Monitoring
  • Point Source Ammonia Monitoring

Typical Industries Benefitting from NH3 Monitoring Systems

  • Industrial Refrigerants
  • Chemical Manufacturing
  • Waste Water Treatment
  • Carbon Fiber Manufacturing
  • Synthetic Fibers Manufacturing
  • Pulp and Paper Mill
  • Fertilizer Manufacturing
  • Metal Treating
  • Rubber Industry