E6.1 - Electrochemical Sensors - at the Heart of Dräger Gas Detection Systems
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- E6 - Gas Sensors II
- Dr. P. Tschuncky - Drägerwerk AG & Co. KGaA, Lübeck (Germany)
- 679 - 682
Dräger offers a wide variety of gas detection systems for medical applications, potentially explosive gases in hazardous atmospheres, breath alcohol and toxic gases in breathing air. Among our detector portfolio electrochemical sensors belong to our key technology, which we try to improve continuously in terms of sensitivity, selectivity and stability.
Ionic Liquids electrolytes display a huge electrochemical “open window” with negligible background currents. They can be designed task specific for the application they are used in and besides outstanding chemical inertness they offer the intrinsic advantage of being nonvolatile, which makes it possible to construct sensors that even can be used under extreme climatic conditions which e.g. can be found for H2S monitoring under dry atmospheric conditions e.g. in oil fields in deserts.
In our lab electrochemical H2S detectors using an ionic liquid as electrolyte have been realized with excellent response characteristics for concentrations ranging from ppb-level up to high ppm-levels. The sensor shows a linear signal and fast response and recovery times together with excellent selectivity.