Catalog excerpts
The Signal Group’s 821S gas divider enables the users of gas analysers to test the linearity of their instruments - simply, quickly and accurately. Compliant Conforms to: US EPA Method D 205 US EPA CFR 40 part 1065 EN14181 annexe B and AST ISO 13485-2016 Uncertainty within 0.5% Constant output flow No change in flow with change in dilution Ancillary products working alongside our gas analysers Simply connect the gases and rotate the selector switch
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821S Gas divider The Signal Group Gas divider has been designed for testing the linearity of any gas analyser. The 821S has ten identical capillaries and a precision balance regulator. The span gas can be selected to flow through a number of those capillaries with the diluent flowing through the remainder, to produce a ratio. Many types of gas analyser are inherently non-linear due to the physical nature of the analysing technique. Photometric analysers (NDIR, NDUV, FTIR / spectrophotometers) need to be linearised before they leave the factory and then at regular intervals during service....
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