• Catalysts can become poisoned or inactive due to contamination (chlorinated & silicone compounds, prolonged exposure to H2S and other sulfur &/or corrosive compounds).
• The only means of identifying detector sensitivity loss is by checking with the appropriate gas on a routine basis and recalibrating as required.
• Requires oxygen for detection.
• Prolonged exposure to high concentrations of combustible gas may degrade sensor performance.
• If flooded with a very high gas concentration, may show erroneously low or no response, and sensor may be damaged or rendered inoperable.