Vapor Detector.

Abstract

It has been shown that coated piezoelectric crystals can detect quantitatively vapors of unsymmetrical dimethyl hydrazine (UDMH) in the presence of a background level of humidity which might be encountered by a GI in the field. The UDMH levels detected ranged from 2 ppm to 115 ppm UDMH. Four crystal coatings which were found to be effective were members of the acrylonitrile-butadiene and styrene-butadiene copolymer families. Crystals coated with these polymers also monitored water vapor quantitatively. Sensor response was sufficiently rapid so that piezoelectric instrumentation could be utilized to sound an alarm for UDMH instantly and could determine the UDMH concentration quantitatively in one minute or less. It was also shown that piezoelectric instrumentation was capable of differentiating between minute differences in UDMH level such as 30 and 31 ppm UDMH. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1974
Accession Number
AD0780171

Entities

People

  • G. M. Varga Jr

Tags

DTIC Thesaurus Topics

  • Alkenes
  • Butadienes
  • Copolymers
  • Crystals
  • Detectors
  • Humidity
  • Hydrazines
  • Instrumentation
  • Piezoelectric Crystals
  • Polymers
  • Vapors
  • Warning Systems
  • Water Vapor

Readers

  • Analytical Chemistry
  • Materials Science and Engineering.
  • Polymer Science and Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Microelectronics - Microelectromechanical Systems