pollution monitoring equipment Articles
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Mass Flow Control in Bioreactors - Case study
Vogtlin mass flow controllers are an excellent tool for precise control of gas flows in bioreactors. Bio reactors are used for critical and delicate processes where mass flow control of relevant gases need to be reliable, repeatable and flexible. For example, the dissolved oxygen needs to be carefully controlled to obtain repeatable pH control and volumes of fermentation gases like CO and H2 ...
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Mass flow controllers for Regulating gas flow rates - Case study
For automatic or manual control, Voegtlin’s thermal mass flow controllers allow high precision regulation of gas flow rates and consistent quality of gas mixtures. The fast control response minimises the setting time. CMOS Sensor Technology By using high-precision CMOS technology (semiconductor sensors) Voegtlin’s thermal measurement and control devices are setting new standards in ...
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A new approach to SSM emissions management
On October 16, 2009, the United States Court of Appeals for the District of Columbia Circuit (DC Circuit) mandated the vacatur of the “Startup, Shutdown, and Malfunction (SSM) exemption” allowed under General Provisions in Subpart A of the National Emission Standards for Hazardous Air Pollutants (NESHAP).1 Under the SSM exemption, NESHAP Subpart A previously stipulated that an ...
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Monitoring Environmental Quality
' In order to determine the effectiveness of actions to improve environmental quality it is necessary to be able to measure relevant environmental parameters at a level of detail which is accurate enough to distinguish the anticipated changes. However, the establishment and maintenance of monitoring systems is time-consuming and expensive and therefore the scale of such systems needs to be kept ...
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