Dräger Polytron 8200 CAT Flammable Gas Transmitter
Overview
The Dräger Polytron 8200 CAT is a high-end, explosion-proof transmitter built to detect flammable gases and vapours before they approach the lower explosive limit. Its sensing element is the catalytic DrägerSensor Ex…DQ, a bead-type sensor with a fast response and strong resistance to poisoning. Besides the usual 3-wire 4 to 20 mA analogue output, the unit offers HART, fieldbus options and Modbus, so it can be integrated with most control systems used in a gas detection scheme.
Seven Star LLC supplies the Dräger Polytron 8200 CAT to oil and gas, petrochemical, power and industrial customers throughout Oman and the GCC. As a trusted supplier of Dräger safety instruments, we offer engineering support in Muscat, and we help project teams confirm the measuring range, housing material and communication protocol before placing an order, so that the transmitter arrives ready to commission.
Measuring Principle of the Dräger Polytron 8200 CAT
Inside the type-DQ sensor, a catalytic bead oxidises combustible gas on a heated element. The heat released changes the electrical resistance of the bead relative to a reference element, and that difference is converted into a concentration value expressed as a percentage of the lower explosive limit (LEL). The Dräger Polytron 8200 CAT uses this proven measuring principle, and Dräger highlights its long-term stability and its resistance to substances that commonly shorten the life of catalytic sensors.
A newly designed gas inlet opening lets the sensor respond within seconds. The data sheet gives a T50 response time of 5 seconds and a T90 of 10 seconds for methane, which allows operators to start countermeasures early and prevent a flammable atmosphere from developing. In the Dräger Polytron 8200 CAT, the DQ sensor covers 0 to 100 % LEL, while the LC sensor variant measures 0 to 10 % LEL for low-range applications.
Housing, Display and Digital Communication
The enclosure is flameproof, conforming to protection type “d”, and an additional terminal box is available for the increased-safety “e” version, which also eases pre-assembly. Customers can choose powder coated copper-free aluminium or SS316L stainless steel, with a sensor housing in stainless steel 303 or 316L. Protection ratings are NEMA 4X and IP65/66/67, with 3/4 inch NPT holes or an M20 cable gland for wiring.
On the Dräger Polytron 8200 CAT, a large graphic backlit display shows the concentration and measuring unit, and green, yellow and red LEDs add alarm and status information. Operation is by magnetic wand over contact surfaces, so the cover stays closed in the hazardous area. Digital interfaces allow remote interrogation of the transmitter state, with PACTware integration possible through a DTM, and HART, PROFIBUS PA, FOUNDATION fieldbus H1 and Modbus RTU variants are available. The built-in data logger stores measuring and event data from earlier years.
Key Features
The Dräger Polytron 8200 CAT brings together sensing speed, robust construction and flexible integration:
- Catalytic DrägerSensor Ex…DQ with excellent long-term stability and strong poison resistance.
- Rapid response, with a T90 of 10 seconds for methane according to the data sheet.
- Output options of 4 to 20 mA, HART, PROFIBUS PA, FOUNDATION fieldbus H1 and Modbus RTU.
- Optional three relays, giving two freely adjustable concentration alarms and one fault alarm for stand-alone operation.
- A remote sensing head so the sensor can sit close to the gas cloud while the display stays at eye level.
- A built-in data logger that records measurement and event data over time.
- A shared design and menu with the other Polytron 8000 series transmitters, which reduces training effort.
- SIL 2 certification by TUEV Sued, plus UL, CSA, IECEx and ATEX approvals and marine approvals for the DQ sensor.
Industrial Applications
Typical uses for the Dräger Polytron 8200 CAT include hydrocarbon storage and loading areas, compressor and pump stations, gas turbine enclosures, battery rooms and fuel handling bays, wherever methane, propane or other flammable vapours could accumulate. The remote sensor option of the Dräger Polytron 8200 CAT is helpful on tall structures and in hard-to-reach positions, and the three-relay version can drive a local beacon or horn without an extra cable run back to a central controller.
Seven Star LLC helps engineering and maintenance teams in Muscat, the Sohar and Salalah economic zones and the rest of the GCC choose between the DQ and LC ranges, plan spare sensor stock and coordinate deliveries around shutdown windows. Because the Dräger Polytron 8200 CAT shares its user interface with the toxic and infrared members of the series, mixed gas detection systems remain straightforward to operate.
Technical Specifications
Published data for the Dräger Polytron 8200 CAT, taken from the Dräger product data sheet:
| Parameter | Specification |
|---|---|
| Model | Dräger Polytron 8200 CAT |
| Type | Explosion-proof transmitter (“d”) or combined with increased safety (“d/e”) |
| Gases | Flammable gases and vapours |
| Measuring ranges | DQ sensor 0 to 100 % LEL; LC sensor 0 to 10 % LEL |
| Accuracy | Zero and sensitivity 1 % LEL or better; long-term drift 3 % LEL or better after 6 months |
| Response time | T50 5 s, T90 10 s (methane) |
| Analogue output | 4 to 20 mA, 3- or 4-wire, sink or source; fault below 1.2 mA |
| Digital output | HART, PROFIBUS PA, FOUNDATION fieldbus H1, Modbus RTU |
| Power supply | 10 to 30 V DC |
| Relays (option) | 2 alarm and 1 fault, single-pole two-way, 5 A at 230 V AC or 30 V DC |
| Temperature | -40 to 80 °C without relay; -40 to 70 °C with relay |
| Housing | Copper-free aluminium or SS316L; sensor housing stainless steel 303 or 316L |
| Protection | NEMA 4X, IP65/66/67; 3/4″ NPT or M20 cable entry |
| Dimensions / weight | 280 x 150 x 130 mm; 2.2 kg aluminium, 4.0 kg SS316L (without docking station) |
| Approvals | UL and CSA Class I Div 1; IECEx and ATEX Ex db IIC T6/T4 Gb; SIL 2 (TUEV Sued); DNV GL, ABS, LR, CCS, RMRS (DQ sensor) |
Ordering Information
Dräger lists these Dräger Polytron 8200 CAT configurations with a DQ sensor and 4 to 20 mA/HART output: 8344439 (aluminium, “d”, approval code XTR 0410), 8344440 (the same with relay, XTR 0411), 8344448 (stainless steel, XTR 0510) and 8344449 (stainless steel with relay, XTR 0511). Increased-safety versions that include the docking station carry the numbers 8344457, 8344458 and 8344466, and custom builds use kit number 8344800. Sensors and accessories include the DrägerSensor PR NPT DQ (6814150), LC NPT (6810675), a remote sensor DQ in aluminium (3706933) or steel (3706934), the magnetic wand (4544101), pipe mount kit (4544198), duct mount kit (6812725) and IR connection kit (4544197). Our team will confirm the correct Dräger Polytron 8200 CAT variant against your specification.
Related Dräger Products
For infrared flammable gas measurement see the Dräger PIR 7000 point infrared gas detector, explore the full Dräger catalogue or compare other devices in our gas analytics category.
For toxic gases and oxygen in the same series, see Dräger Polytron 8100 EC toxic gas transmitter.
Request a Quote for Dräger Polytron 8200 CAT
To obtain a formal quotation, check current availability and lead time or download the Dräger datasheet for the Dräger Polytron 8200 CAT, contact the instrumentation division at Seven Star LLC. We supply Dräger equipment in Oman and the GCC and will help you specify the right Dräger Polytron 8200 CAT variant for your flammable gas application.
- Datasheet Dräger Polytron 8200 CAT Product Information and Data Sheet Download
Dräger gas detection product families listed here
Fixed detection is covered by the Polytron line: the Polytron 8100 EC for toxic gases and oxygen with electrochemical sensors, the Polytron 8200 CAT for flammable gases with a catalytic sensor, the Polytron 7000 and the PIR 7000 point infrared detector for hydrocarbons. Dräger flame detectors on this page are the Flame 1500 and Flame 2500 (triple infrared) and the Flame 2700 (multi-infrared). Portable instruments include the Pac 8000 single-gas detector, the X-am 2500 for one to four gases and the X-am 8000 for up to seven. Short-term colorimetric tubes such as Hydrogen Sulfide 100/a (CH29101) are listed with the analyzer accessories.Where Dräger detectors are used
Polytron transmitters and PIR 7000 heads are found on wellhead and gathering facilities, gas plants, refineries, tank farms, LNG and petrochemical units, and in water treatment chlorine rooms. Portable Dräger gas detectors serve confined space entry, hot work permits and personal H2S monitoring, which is routine on sour fields in the GCC. Detector tubes remain a simple spot check where an electronic sensor is not available for the gas.Ordering Dräger equipment: what we need
Dräger identifies most items by a seven-digit part number, such as 8101211, and that number is the most direct route to the right quotation. For a fixed transmitter, add the target gas, measuring range, output (4-20 mA, HART or relays), housing material, cable entry thread and the required hazardous-area approval. For portables, list the sensor configuration, pump or diffusion mode and the charger or calibration accessories needed. For tubes, give the gas and the range printed on the box.Browse Dräger products by category: Fire & Gas Detector, Gas Analyzer Accessories.
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