Dräger Polytron IR
Suitable for robust use even under adverse ambient conditions – the flameproof, infrared-optical transmitter Dräger Polytron IR is characterized by its exceptional stability and longevity.
Product benefits
- Configurable measuring ranges
- The measuring range of the Polytron IR can be configured: Typical applications require a measuring range from 0 up to 100 % LEL whereas leakage or workplace limit value monitor create measuring tasks in the ranges from 0 up to 20 % LEL or 0 up to 5 %, or even in the ppm range (gas-independent). And with the Polytron IR type 334, methane can also be measured up to a 100 volume %. The configuration can easily be performed and is guided by the menu with a HART® handheld device or a PC.
- User-friendly calibration function
- The Dräger Polytron IR can be calibrated in a user-friendly way with standard test gases: The desired test gas (e.g. methane or propane) is simply selected among the 38 substances in the transmitter's comprehensive gas library. A test gas different from the substance can be chosen as a test gas. The calibration and sensitivity parameters are automatically calculated for the substance to be measured – performance approved.
- Patented "Beam Block" warning signal
- When the "Beam Block" warning signal is activated, the Polytron IR does not simply switch to interference but to a "stand-by mode": A permanent warning signal is emitted (e.g. 2 mA) while measuring continues in the background, and in the case of a gas concentration above 15 % LEL, the measuring mode is resumed. A spontaneous disruption of the measuring mode can therefore be prevented; planned and precautionary maintenance becomes possible.
- Performance features
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- Two versions (type 334 and type 340) with different measuring wave lengths for different hydrocarbons with different sensitivities
- Double-compensating and non-imaging optics (with 4-beam process)
- A large gas library with up to 38 substances (of which 27 substances are performance approved in accordance with DIN EN 50054/50057)
- Configurable measuring ranges in LEL % , Vol. -% and ppm
- Fast response behavior, supported by the ""chimney effect"" of the splash guard
- An analog 4 up to 20 mA signal as well as digital output signals: RS 485 and HART® (including multidrop feature)
- Beam block warning signal in the case of dirty optics as a preventive maintenance
- Configurable maintenance signal
- Specified temperature area from -40 °C to +65 °C
- Unlimited applications in a moist atmosphere
- Hermetically closed stainless steel housing SS 316L
- Long maintenance interval thanks to minimum long-term drift
- No movable parts
- Typical life time: 15 years
- Explosion protection approvals for worldwide use: ATEX, IECEx, UL, CSA
- Dust ex-protection for zones 21 and 22
- Protection types: IP 65, IP 66 and IP 67
- Continual self-diagnosis according to T023
- Certified SIL-2 compatibility (Safety Integrity Level)
Product Information
Accessories
Mounting set
Mounting the transmitters onto a wall or mounting plate.
Order No.: 68 09 951
Splash guard
Guards the measuring cuvette against water and dirt, quick gas exchange through "chimney effect".
Order No.: 68 09 750
Insect guard
Guards against insects or spiders that might block the gas inlet or outlet apertures of the splash guard.
Order No.: 68 10 162
Hydrophobic filter
Guards the measuring cuvette against dust and insects, can be combined with other splash guard.
Order No.: 68 10 519
Flow cell
Function check for the transmitters for high wind speeds and/or high test gas concentration, suitable for process applications.
Order No.: 68 09 450
Remote test adapter
Function test/calibration of the transmitter with the usual test gas concentrations.
Order No.: 68 10 985
Gassing/process adapter
Sampling or process applications, material: POM (conductible).
Order No.: 68 09 946
Process cuvette
Sampling or process applications, fast response behavior through minimum inner volume, material: Stainless steel.
Order No.: 68 10 780
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Literature
List of detectable gases and vapours.
For over 70 years, Dräger has been one of the technology leaders in gas detection.
When there’s danger in the air ... this can quickly pose a high risk to humans, the environment, and all types of property and systems. Recognize the threat before it is too late.
Explosion hazards mostly arise from flammable gases and vapours. Instead of avoiding their ignition by explosion protection measures it may be preferable to detect them before they become ignitable.
Safety Instrumented Systems are used to reduce the risk for the protection of people, plants, and environment.
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