The Dräger Polytron® 8700 IR is an advanced explosion proof transmitter
for the detection of combustible gases in the lower explosion limit (LEL).
It uses a high performance infrared Dräger PIR 7000 sensor, which will
quickly detect most common hydrocarbon gases. Besides a 3 wire 4 to
20 mA analogue output with relays, it also offers Modbus and Fieldbus
making it compatible with most control systems.
Efficient, stable and robust – the Dräger PIR 7000
With its stainless steel 316L enclosure and drift free optics, the Dräger PIR 7000 is built for the harshest
industrial environments such as offshore installations. 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 integrated gas library with up to 100 gases provides
a high degree of application flexibility. Each of the gases listed there can be picked from the menu and
automatically cross-calibrated with a standard calibration gas such as methane or propane. No need to consult
the factory when applications change.
Easy device management via digital communication
The Dräger Polytron 8700 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.
The Polytron 8700 has a data logger, which records measuring and event data from the past years.
Same design, same operating principle
The Dräger Polytron 8700 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 8700 is
operated by means of a magnetic wand over contact surfaces.
Three relays for controlling external equipment
Upon request, the Dräger Polytron 8700 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 8700 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
Make the impossible possible with the remote sensor
An available remote sensor condulet housing allows the PIR sensor to be installed up to 30 metres (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.