| ORONO, Maine
– Monitoring the performance of jet engines and other combustion technologies
requires sensors that can operate at high temperatures. University of Maine
master’s student Jeremy Thiele of Hollis, Maine earned an award in 2004
for his research on patented sensor technology that can operate at 250
degrees Celsius and detect hydrogen gas.
Thiele worked with Mauricio Pereira
da Cunha, assistant professor in the Dept. of Electrical and Computer Engineering,
who developed the sensor. The Institute of Electrical and Electronics Engineers
(IEEE) awarded Thiele its Student Award at a meeting in Montreal last fall.
Thiele made and successfully demonstrated
a hydrogen sensor using langasite crystals. Langasite is a family of materials
that have several beneficial properties for sensing purposes. It has proved
to be more sensitive and stable at high temperatures than other sensing
platforms such as quartz crystals.
In his project, Thiele equipped a
langasite sensor with two electrodes made of the element palladium. For
sixteen weeks, the sensor detected hydrogen gas at several different concentrations.
Langasite has proven to work reliably at 750 degrees C.
Thiele's poster was titled “Dual
Configuration High Temperature Hydrogen Sensor on LGS SAW Devices.” Detecting
hydrogen is important to the efficient operation of fuel cells, jet engines
and power plants.
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