The CDH200 is a City Technology combustible gas sensor designed to detect the concentration of flammable gases in the air, specifically measuring from 0-100% LEL (Lower Explosive Limit). It uses a catalytic bead principle, where gas combustion on the sensor increases its resistance, creating an output signal proportional to the gas concentration. The CDH200 has features like high poison resistance and is built for use in hazardous environments with appropriate certifications.

• Key Features & Specifications
• Technology: Catalytic bead
• Measurement Range: 0-100% LEL (Lower Explosive Limit)
• Application: Detecting combustible gases, such as methane, in potentially hazardous areas to prevent explosions
• Certifications: CSA/SIRA certified for use in hazardous locations
• Robust Design: Suitable for use in industrial environments
• Poison Resistance: Features high resistance to substances like lead, sulfur, silicones, and phosphates, which can degrade catalytic sensors
• Installation: Requires installation in a certified, protective enclosure (like an increased safety enclosure) to maintain ingress protection (IP54 or better)
• Power: Requires a 300mA current for operation
• Signal: Produces an output signal, typically a 12-16 mV/% methane signal, proportional to the detected gas concentration