ott.ua.edu

1. UAIPD05-0014
“Ionic liquid Temperature Sensor”
Dr. Romana Reddy and Dr. Robin Rogers

2. • Mercury Thermometers
• Temperature range from -39 degrees oC to 350 oC
• Volatile and toxic even at low concentrations
• Poses an environmental hazard associated with storage and
disposal of broken thermometers
• Ethanol Thermometers
• Temperature range from -110 oC to +78 degrees Celsius
• Fluid loss by evaporation is hard to avoid when temperatures
reach 78 oC
Liquid-In-Glass Thermometers

3. Ionic Liquid Thermometer
 Thermometer filled with
ionic thermometric liquid
 Tested ionic liquids are
reasonably inexpensive
along with complete set
of toxicological data
available
 Excellent thermal stability
 Readily biodegradable
 Range of about -100 oC to
+400 oC
Chemical structures of ionic liquids used
(a) [TEMA][MeSO4] (b) [P66614][NTf2]

4. Advantages
 Wider temperature range
than mercury or ethanol
thermometers
 Easy to calibrate with
lower toxicity
• Environmentally safer
associated with storage
and disposal of broken
thermometers
The red-dyed [TEMA][MeSO4 ], in baths of
boiling water (left picture) and melting ice
(right picture) for determining the marks at
100 ◦ C and 0 ◦ C respectively, while
compared with the readings of a commercial
thermometer (with blue filling fluid).

5. Inventor
• Dr. Ramana Reddy
• ACIPCO Professor
• 1 patent application
• 3 patents issued
• Departments
• Metallurgical and Materials
Engineering
• Center for Advanced Vehicle
Technologies
• Environmental Institute
rreddy@eng.ua.edu

6. Inventor
• Dr. Robin Rogers
• Professor
• Recipient of Paul Walden Award
in Ionic Liquids - 2012
• 22 patent applications
• 3 patents issued
• Departments
• Chemistry
• Center for Green Manufacturing
rdrogers@as.ua.edu

7. Office for Technology Transfer
720 2nd Ct E
Tuscaloosa, AL 35401
UAIPD05-0014
OTT@UA.edu
www.OTT.UA.edu