Polytron IR flammable gas monitor

The measuring range of the Dräger Polytron IR can be set: The measuring range for typical applications is 0 to 100 % LEL, while the leak or workplace limit monitor can establish measurement tasks ranging from 0 to 20 % LEL or 0 to 5% or even the order of ppm (independent of gas). With the Polytron IR 334, methane with a maximum volume ratio of 100% can be detected. It can be easily configured using a HART® handheld device or computer via menu guidance.

User-friendly calibration function interface

Polytron IR is calibrated using standard test gases and is user-friendly: the required test gas, such as methane or propane, can be selected directly from the 38 substances in the transmitter comprehensive gas library. A test gas different from the substance can be selected as the test gas. Calibration of the substance to be tested and automatic calculation of sensitivity parameters – performance is certified.

Two models (Model 334 and Model 340) are configured with different measurement wavelengths for different hydrocarbons with different sensitivities

Dual Compensated and Non-Imaging Optics (with 4-Beam Processing)

Large gas library for 38 substances (27 of which have been certified for performance in accordance with DIN EN 50054/50057)

Measuring ranges can be set in LEL%, Vol. -%, and ppm

With the help of the splash guard's "chimney effect", the response speed is fast

Analog 4 to 20 mA signal and digital Output signal: RS 485 and HART® (including multi-node mode)

Beam shielding warning signal – optical contamination and prompt for maintenance

Configurable maintenance signals 

The specified temperature range is -40°C to +65°C

Unlimited use in wet environments

Sealed stainless steel housing SS 316L

Minimizes long-term drift and has long maintenance intervals

No moving parts

Typical service life: 15 years 

Explosion-proof certified, worldwide: ATEX, IECEx, UL, CSA

Dust protection against zones 21 and 22 ex-protection

Protection Type: IP 65, IP 66 and IP 67

Ongoing self-diagnosis, in accordance with T023

Certified SIL-2 Compatibility (Safety Integrity Level)