Accession Number:

ADA172876

Title:

USAF/NRL Surface Acoustic Wave Vapor Sensor Program.

Descriptive Note:

Memorandum rept. Jun 84-Aug 85,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Ballantine,D.
• Snow,A.
• Klusty,M.
• Chingas,G.
• Wohltjen,H.

Report Date:

1986-10-06

Pagination or Media Count:

22.0

Abstract:

A sensitive, inexpensive chemical microsensor is described that is capable of meeting performance requirements for DoD applications. Experimentally obtained frequency shifts for known mass loading compare favorably with theoretically predicted mass sensitivities for the 31, 52 and 112 MHz surface acoustic wave SAW devices. The 300 MHz SAW device exhibits a frequency stability of better than 1 part in 10 to the 7th power, as well as good temperature and pressure stability under ambient conditions. Response times were generally less than 10 sec. When coated with a fluorepoxy pre-polymer this device exhibited a calculated detection limit of 0.04 mgcu m for DMMP.

Descriptors:

• *DETECTION
• *VAPORS
• *SURFACE ACOUSTIC WAVE DEVICES
• SURFACE WAVES
• ACOUSTIC WAVES
• AMMONIA
• RESPONSE

Subject Categories:

• Economics and Cost Analysis
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE