Benefits of Polytron 8720

Efficient, stable and robust – the Dräger PIR 7200
With its stainless steel 316L enclosure and drift free optics, the Dräger PIR 7200 is built for the harshest
industrial and commercial outdoor environments. The unique 4 beam signal stabilizing system makes the sensor
resistant to dust or dirt deposits on the optical surfaces. Environmental and ageing effects are compensated
ensuring long term, drift free operation. The measuring range can be freely adjusted between 0 – 2,000 ppm
and 0 – 30 % volume enabling a wide variety of applications.
Easy device management via digital communication
The Dräger Polytron 8720 is equipped with digital interfaces allowing for quick and easy remote interrogation
of the transmitter’s state. 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 Dräger Polytron 8720 belongs to the Polytron 8000 series. All transmitters in this series have the
same design and user interface. This allows for uniform operation with reduced training and maintenance
requirements. The large graphic backlit display shows status information clearly and in an easy to use format.
The measured gas concentration, selected gas type, and measuring unit are displayed during normal operation.
Colored LEDs (green, yellow and red) provide additional alarm and status information. The Polytron 8720 is
operated by means of a magnetic wand over contact surfaces.
Three relays for controlling external equipment
Upon request, 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. Audible 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 aluminium 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) and this also facilitates pre-assembly.
Make the impossible possible with the remote sensor
The remote sensor connection housing allows you to install the sensor separately from the transmitter. This
allows you to simply place the sensor closer to the gas cloud in hard-to-reach locations. The display remains visible at eye level. Since the sensor is connected via an intrinsically safe connection, no conduit cabling is required. The connection also allows ‘hot replacement’ of the sensor in the hazardous area.
Data logger
The Polytron 8720 has a data logger, which records measuring and event data from the past years.