Drager Polytron 8720 IR

Code: Polytron 8720
  • CO2
  • IR Sensors
  • Short Response Times

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Drager Polytron 8720 IR

The Drager Polytron 8720 IR is an top explosion proof transmitter which detects carbon dioxide CO2 in percent volume or ppm. At the heart is the infrared Drager PIR 7200 sensor, which can tolerate water submerging.  Communications  a 3 wire 4 to 20 mA analog output with relays, and Modbus and Fieldbus making it usable with the majority of control systems.

Benefits Drager Polytron 8720 IR

Efficient, reliable and tough– the Drager PIR 7200
Featuring a stainless steel 316L enclosure and drift free optics, the Drager PIR 7200 is built for can cope with the most extreme environments.  The unique 4 beam signal stabilizing system makes the sensor resistant to dust or dirt deposits on the optical surfaces. Built in compensation means drift free operation from age or climate. The measuring range can be freely adjusted between 0 – 2,000 ppm and 0 – 30% volume enabling a wide variety of applications.

Detection of carbon dioxide

Digital interfaces allow remote deployment of the Drager Polytron 8720. Integration with existing asset management systems such as PACTware™ is possible via DTM. In addition to the common HART® communication system, the fieldbus interfaces PROFIBUS® PA, FOUNDATION fieldbus™ H1, and Modbus RTU are also available.

Same design, same operating principle

The Drager Polytron 8720 belongs to the Polytron 8000 series. All transmitters in this series have common design and the same interface allowing for consistent operation and reduced training, commissioning and maintenance.  A display backlit shows status information. Gas readings are shown in operation. The LEDs are displayed in color  green, yellow and red providing alarm and status detail.
The Polytron 8720 is operated by means of a magnetic wand over contact surfaces.

Three relays for controlling external equipment

As an option, the Dräger Polytron 8720 can also be supplied with three integrated relays. This enables you to use it as an independent gas detection system with two arbitrarily adjustable concentration alarms and one fault alarm. Audio alarms, signal lights, or similar devices can thus be controlled locally without an additional cable between the transmitter and central controller.

Safe, robust housing for every application

Polytron 8720 features a Class I, Div. 1 rated explosion proof enclosure made from aluminum or stainless steel, making it suitable for a wide range of environmental conditions. A protection type “e” version includes a convenient docking station which allows installation in hazardous atmospheres without running conduit (where approved).


Drager Polytron 8720 IR
Make the impossible possible with the remote sensor
An available remote sensor condulet housing allows the PIR sensor to be installed up to 30 meters (100 feet) away from the Polytron transmitter. A special calibration flow cell accessory permits one person to perform a full calibration of a remote mounted sensor from the transmitter.
The Polytron 8720 comes a data logger, which logs measuring and event data from the past years.

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Title Size
polytron-8720 457 KB
Polytron 8000 70 KB

Additional information

Weight0.09 kg