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Title: Quartz resonator fluid monitors for vehicle applications

Thickness shear mode (TSM) quartz resonators operating in a new {open_quotes}Lever oscillator{close_quotes} circuit are used as monitors for critical automotive fluids. These monitors respond to the density and viscosity of liquids contacting the quartz surface. Sensors have been developed for determining the viscosity characteristics of engine lubricating oil, the state-of-charge of lead-acid storage batteries, and the concentration variations in engine coolant.
Authors:
; ; ;  [1] ;  [2]
  1. Sandia National Labs., Albuquerque, NM (United States)
  2. Ktech Corp., Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
10183513
Report Number(s):
SAND--94-1999C; CONF-9409202--1
ON: DE94018910; TRN: 94:008789
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Sensors Expo 94,Cleveland, OH (United States),20-22 Sep 1994; Other Information: PBD: [1994]
Research Org:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; ELECTRIC BATTERIES; MONITORS; COOLANTS; LUBRICANTS; QUARTZ; DENSITY; RESONATORS; SHEAR; VISCOSITY; ENGINES; MATHEMATICAL MODELS; ELECTRONIC CIRCUITS; VEHICLES 440800; MISCELLANEOUS INSTRUMENTATION