Dräger Polytron 8720 IR

Premium Stationary Carbon Dioxide Detection

The Dräger Polytron 8720 IR is a top-tier, explosion-proof stationary gas detector engineered for continuous monitoring of carbon dioxide (CO2) in ambient air. Utilizing the highly advanced Dräger PIR 7200 infrared sensor, this premium transmitter delivers unmatched measurement accuracy, long-term stability, and rapid response times. It converts gas concentrations into a standard 4 to 20 mA analog output with HART digital communication, allowing seamless integration into sophisticated asset management networks and plant control systems.

Fail-Safe Infrared Technology and Simple Maintenance

Unlike traditional electrochemical sensors that suffer from early exhaustion or drift when exposed to continuous background gas, the optical infrared technology inside the Polytron 8720 IR is completely immune to sensor poisoning. It operates reliably in oxygen-deficient or completely inert atmospheres. The transmitter features a matrix-backlit graphical display that presents real-time CO2 measurements, status icons, and advanced diagnostics clearly. Thanks to its non-intrusive design, operators can use a magnetic wand to calibrate or configure settings without opening the flameproof housing or declassifying the hazardous area.

Modular Architecture and Digital Connectivity

Built to excel in the most punishing industrial climates, the transmitter housing is available in either copper-free aluminum or premium 316 L stainless steel, complete with an IP65/66/67 ingress protection rating to resist heavy rain, washdowns, and dust. This high-end model can be customized with optional fieldbus modules (such as Modbus or Profibus) and an integrated relay module. The relay upgrade provides two gas alarm relays and one fault relay, enabling the Polytron 8720 IR to act as an independent, standalone safety system that automatically actuates local horns, strobes, or ventilation fans.

Industrial Applications and Use Cases

• Carbon Capture & Storage (CCS): Monitoring infrastructure for localized carbon dioxide leaks, storage sites, and transport lines.

• Food and Beverage Industries: Protecting personnel from CO2 accumulation in breweries, bottling plants, and cold storage facilities.

• Chemical and Petrochemical Processing: Managing process safety where carbon dioxide is utilized as a feedstock or process byproduct.

• Water Treatment Facilities: Monitoring surrounding air quality where carbon dioxide is injected for pH neutralization and stabilization.