TY - CONF A1 - Hübert, Thomas A1 - Banach, Ulrich ED - Carcassi, M.N. T1 - Response time of hydrogen sensors N2 - The efficiency of gas sensor application for facilitating the safe use of hydrogen depends to a considerable extent on the response time of the sensor to change in hydrogen concentration. The response and recovery times have been measured for five different hydrogen sensors, three commercially available and two promising prototypes which operate at room temperature. Experiments according to ISO 26142 show that most of the sensors surpass much for a concentration change from clean to hydrogen containing air the demands of the Standard for the response times t(90) and values of 2 to lös were estimated. For an opposite shift to clean air, the recovery times t(10) are from 7 to 70 s. Results of transient behaviour can be fitted with an exponential approach. It can be demonstrated that results on transient behaviour depend not only from investigation method, and the experimental conditions, like gas changing rate and concentration jump, as well as from operating Parameters of sensors. In comparison to commercial MOS and MIS-FET hydrogen sensors new sensor prototypes operating at room temperature possesses in particular longer recovery times. T2 - ICHS2013 - 5th International conference on hydrogen safety CY - Brussels, Belgium DA - 09.09.2013 KW - Hydrogen sensors KW - Time response PY - 2013 SN - 978-2-9601366-0-9 SP - Paper 124, 1 EP - 8 AN - OPUS4-31082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hübert, Thomas T1 - Hydrogen sensor deployment N2 - Presentation of BAM test facility. Presentation of previous analysis of sensor performance in relation to application requirements and sensor data base. The main topics of sensor metrological, deployment and operational metrics were discussed. T2 - Hydrogen Sensor Workshop CY - Brussels, Belgium DA - 10.05.2017 KW - Hydrogen sensors KW - Sensor deployment PY - 2017 AN - OPUS4-40270 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Boon-Brett, L. A1 - Black, G. A1 - Banach, Ulrich T1 - Hydrogen sensors - A review N2 - Hydrogen sensors are of increasing importance in connection with the development and expanded use of hydrogen gas as an energy carrier and as a chemical reactant. There are an immense number of sensors reported in the literature for hydrogen detection and in this work these sensors are classified into eight different operating principles. Characteristic performance parameters of these sensor types, such as measuring range, sensitivity, selectivity and response time are reviewed and the latest technology developments are reported. Testing and validation of sensor performance are described in relation to standardisation and use in potentially explosive atmospheres so as to identify the requirements on hydrogen sensors for practical applications. KW - Hydrogen sensors KW - Hydrogen detection KW - Detection technologies KW - Technology developments PY - 2011 DO - https://doi.org/10.1016/j.snb.2011.04.070 SN - 0925-4005 SN - 1873-3077 VL - 157 IS - 2 SP - 329 EP - 352 PB - Elsevier CY - Amsterdam [u.a.] AN - OPUS4-24037 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hübert, Thomas A1 - Majewski, Jacek T1 - Transient response time measurement of hydrogen sensors N2 - The efficiency of gas sensor application for facilitating the safe use of hydrogen depends considerably on the sensor response to a change in hydrogen concentration. Therefore, the response time has been measured for five different-type commercially available hydrogen sensors. Experiments showed that all these sensors surpass the ISO 26142 standard; for the response times t90 values of 2 s to 16 s were estimated. Results can be fitted with an exponential or sigmoidal function. It can be demonstrated that the results on transient behaviour depend on both the operating parameters of sensors and investigation methods, as well as on the experimental conditions: gas change rate and concentration jump. T2 - 7th International Conference on Hydrogen Safety (ICHS 2017) CY - Hamburg, Germany DA - 11.09.2017 KW - Response time measurement KW - Sensor characteristics KW - Hydrogen sensors PY - 2017 AN - OPUS4-41928 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -