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    TEXT VERSION OF SLIDE:

    Title: Electrochemical Sensors

    Type: Text Slide

    Content:
    • Disadvantages
      • Not specific to single gas without use of filters or other methods
      • HCl - zero drift due to bias voltage, zero drift at high temperatures, affected by rapid changes in RH%
      • NH3 - not entirely catalytic - electrolyte is used up, zero drift at high temperatures
    • Examples of Instruments: Dräger PAC III, Dräger Model 190, Quest SafeLog 100, Biosystems Toxi Ultra, Several Multi-Gas models