Differential Electrochemical Mass Spectrometer (Direct Alcohol Fuel Cell), Shanghai Sunny Hengping Scientific Instrument Co., Ltd (CAT#: STEM-AI-0101-YJL)

Differential Electrochemical Mass Spectrometer (Direct Alcohol Fuel Cell) is manufactured by Shanghai Sunny Hengping Scientific Instrument Co., Ltd. DEMS can qualitatively and quantitatively measure the gases produced or consumed by fuel cells during production, storage and operation in real time. DEMS can be used in fuel cells such as direct alcohol fuel cells and hydrogen-oxygen fuel cells. In the application process of direct alcohol fuel cells and hydrogen-oxygen fuel cells, DEMS can realize real-time online monitoring of reactants (methanol, ethanol, hydrogen, oxygen) and intermediate products and by-products (carbon dioxide, aldehydes, acids, etc.) . It measures the generation of volatile gaseous products from electrochemical reactions in electrochemical test cells.

Mass range: 1-200amu
Mass Analyzer: Quadrupole
Ion source: electron bombardment ion source
Detector: Faraday Cylinder / Electron Multiplier
Detection limit: 10ppm (Faraday cylinder), 10ppb (electron multiplier)
Mass axis stability: <±0.1 amu/72h
Vacuum system: oil-free diaphragm pump and turbomolecular pump
Data output: ion current intensity data output and online calculation of percentage concentration
Number of detected components: unlimited

The capillary injection assembly consists of a capillary, an evaporation chamber, a heating system, a carrier gas system and a backing pump
The use of a smaller volume of evaporation chamber can meet the experimental needs, and can reduce the dead volume of the gas and avoid the mixing of the gas in different time periods
Adopt high-precision heating system to ensure the consistency of gas
The carrier gas system and the backing pump can ensure the renewal of the gas and shorten the pipeline transmission time
The filament is made of thorium-iridium wire, which has strong water resistance and oxidation resistance, and can withstand long-term continuous sample gas injection and maintain long-term stability
Using Faraday cylinder/electron multiplier dual detector, it can measure different concentrations of gas simultaneously
The mass spectrometry software gives both ion current and concentration data for easy selection and viewing

Differential Electrochemical Mass Spectrometer (Li-ion Battery) (CAT#：STEM-AI-0102-YJL)