USA flag logo/image

An Official Website of the United States Government

Passive Wireless Cryogenic Liquid Level Sensors Using Orthogonal Frequency…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2007 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Applied Sensor Research & Development Corporation
1195 Baltimore-Annapolis Boulevard, Unit #2 Arnold, MD 21012-1815
View profile »
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2007
Title: Passive Wireless Cryogenic Liquid Level Sensors Using Orthogonal Frequency Coded Acoustic Wave Devices
Agency: NASA
Contract: NNK07EA38C
Award Amount: $599,948.00


This proposal describes the continued development of passive wireless surface acoustic wave (SAW) based liquid level sensors for NASA application to cryogenic liquid level sensing. Orthogonal Frequency Coded (OFC) SAW devices have been demonstrated as passive wireless temperature sensors in NASA Contract NNK04OA28C, and are being further developed under NNK05OB31C. The liquid level sensors use damping of the acoustic wave caused by mass loading of the liquid to produce fast, reversible liquid level sensors. The Phase I research successfully demonstrated operation of these devices as liquid level sensors in selected liquids of interest at cryogenic temperatures. Stability of selected commercially available SAW devices was confirmed, both when exposed to various (extreme and gradual) temperature changes, and upon repeated exposure to liquid nitrogen. The reversibility of the device response was confirmed. Phase I demonstrated the technical feasibility of using these sensors for cryogenic liquid level monitoring of low to moderate pressure liquids (under 500 psi). Phase II will result in prototype product development.

Principal Investigator:

Leland P. Solie
Principal Investigator

Business Contact:

Jacqueline J. Hines
Business Official
Small Business Information at Submission:

Applied Sensor Research & Development Corporation
Unit 2, 1195 Baltimore-Annapolis Blvd. Arnold, MD 21012

EIN/Tax ID: 203272943
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Central Florida
4000 University Boulevard
Orlando, FL 32816 8005
Contact Phone: (407) 823-2414
RI Type: Nonprofit college or university