ammonia sensor Articles

  • FAQ - Ammonia Gas Detection Systems

    Please view the full article to find the answers to these questions: Where might hazardous levels of ammonia occur? What ammonia gas detectors are available from CETCI? At what height should ammonia gas detectors be mounted? Where on the ceiling should the ammonia gas detector be located? How many ammonia gas detectors are required? What is a bump test and why should they ...

  • BUMP TESTING AMMONIA (NH3) SENSORS

    Bump testing a gas sensor involves flowing a concentration of gas that is slightly higher than the Low alarm setpoint of the gas detector for a short period of time (1-2 minutes or less). The purpose of a bump test is to confirm that the sensor responds to the presence of gas, the low alarm will activate and the gas detector overall ...

  • Effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes

    The effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes (MWNT) is presented in this paper. The MWNT were chemically oxidised in a mixture of concentrated sulphuric and nitric acids. The oxidation time was varied from 4 h to 12 h. X-ray photoelectron spectroscopy was used to study the effect on the chemical composition of the nanotube surface. The results ...


    By Inderscience Publishers

  • Chemical Industry: Ammonia Emergency Plan Calls on Packed Tower to Scrub Released Chemicals Case Study

    A few years ago Union Camp turned a corner. Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands. At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively with ...


    By CR Clean Air Group, LLC

  • Pulp & Paper: Ammonia Emergency Plan calls on Packed Tower Case Study

    A few years ago Union Camp turned a corner. Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands. At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively ...


    By CR Clean Air Group, LLC

  • Atomic cluster device research in New Zealand

    We review research in New Zealand on nano-electronic devices fabricated using atomic clusters as building blocks. Techniques described include those based on percolation, and on self (or directed) assembly in templates. The templates used are V-grooves etched into silicon wafers and lithographically defined patterns in PMMA on silicon. Both methods exploit the tendency, which is demonstrated by ...


    By Inderscience Publishers

  • Typical Sensor Location Considerations

    The sensor mounting location within a space may be dependent on many variables. There are no specific formulas since each application will have it’s own determining factors and priorities. These include, but are not limited to: source of gas: Is the source a combustion exhaust from a vehicle or furnace or a vapour from a tank spill, pipe leak, or faulty valve? density of ...


    By Arjay Engineering Ltd.

  • How to bump test and calibrate gas detection equipment

    Introduction ATEX, IEC, British HSE, and US OSHA standards all call for the bump test and calibration of any portable instrument used for worker health and safety protection in a potentially hazardous environment. In order to ensure safety it is necessary not only for the gas meter to read accurately but also ...


    By Ion Science Ltd.

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