Surface acoustic wave sensor for refrigerant leakage detection
A SAW sensor is optimized for detection of refrigerant leakage in a refrigerant system or other gases, vapors, explosives or chemicals of interest. The SAW sensor includes a piezoelectric substrate; an interdigitated transducer deposited on the piezoelectric substrate, the interdigitated transducer having an input portion that receives input surface acoustic waves and an output portion that emits output surface acoustic waves; and a refrigerant sensor film located between the input portion and the output portion of the interdigitated transducer, the refrigerant sensor film including a sorbent material that is selected for preferential adsorption of a target refrigerant over atmospheric gases. Adsorption of the target refrigerant by the sorbent material results in a frequency shift of a frequency of the output surface acoustic waves relative to a frequency of the input surface acoustic waves. The sorbent material may be a metal organic framework (MOF) material, a covalent organic framework (COF) material, a porous organic cage or organic macrocyles such as calix [n] arene and its related derivatives.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Parker-Hannifin Corporation, Cleveland, OH (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- Assignee:
- Parker-Hannifin Corporation (Cleveland, OH)
- Patent Number(s):
- 11,796,508
- Application Number:
- 17/635,118
- OSTI ID:
- 2293760
- Country of Publication:
- United States
- Language:
- English
Similar Records
Resonant surface acoustic wave chemical detector
Conducting metal oxides integrated with the surface acoustic wave (SAW) sensor platform