A Novel Sulfur Dioxide Detector

Sulfur dioxide detector (SO2) is a toxic gas with a pungent odor that can cause respiratory diseases and breathing difficulties. It is also a contributing factor to acid rain and atmospheric particulate matter. It is emitted during the combustion of fossil fuels and is generated by multiple industrial activities such as manufacturing hydrosulfites and other sulfur-containing chemicals; bleaching wood pulp and paper; processing, disinfecting, and bleaching food; and metal and ore processing

How do you test for the presence of SO2?

Our SO2 detector uses electrochemical technology to detect and alert personnel of any SO2 concentrations above pre-set safety levels. The sensor converts the SO2 in the air into an electronic signal that is monitored by the onboard microprocessor. When the signal exceeds the alarm level, an audio and visual warning will occur to ensure personnel are protected from exposure.

The probe is assembled from functional Cy-CDs that exhibit ratiometric near-infrared fluorescence response to SO2 and its derivatives. It was successfully applied for quantitative detection of SO2 derivatives in agricultural crop leaf tissues that were assimilated by stomata from SO2-polluted air. The result showed that this SO2 detector has superior sensitivity, selectivity, and stability to other analytical methods for gas sensing such as colorimetry.

SO2 is a common pollutant in industrial environments and a significant contributor to the formation of acid rain. This makes a SO2 gas detector a crucial device for the workplace to prevent worker exposure and protect personal safety. It is also important to test a SO2 detector regularly for accurate operation. This is a process known as bump testing and involves periodically exposing the unit to a known gas source in order to confirm the unit operates correctly and that it triggers the appropriate alarms when necessary.

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