Improved industrial humidity sensors and control systems. Dew point hygrometer. Phase 1. Final report

Technical Report · Fri Nov 01 04:00:00 EST 1985

OSTI ID:5857167

Sulouff, R E; Randazzo, T A

A capacitive dew point hygrometer was designed, fabricated, and tested for applications in industrial grain drying environments. This report describes the system development and the results of the fabrication and sensor evaluations. The dew point sensor was fabricated on silicon to provide a capacitive condensate detector that could detect liquid water or ice on the surface. The change in capacitance occurs due to the higher dielectric constant of water over air and results in an increase of capacitance from 25 pF dry to 40 pF completely wet. An integrated permalloy resistance temperature device (RTD) was also present on the surface of the sensor.

• Research Organization: Honeywell, Inc., Plymouth, MN (USA). Solid State Electronics Div.
• DOE Contract Number: FC07-84ID12558
• OSTI ID: 5857167
• Report Number(s): DOE/ID/12558-T1; ON: DE86011052
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
CEREALS
CONTROL
CONTROL SYSTEMS
DRYERS
DRYING
ECONOMIC ANALYSIS
ECONOMICS
ENERGY CONSERVATION
FEASIBILITY STUDIES
GRASS
HUMIDITY CONTROL
HYGROMETRY
MEASURING INSTRUMENTS
MOISTURE GAGES
PERFORMANCE TESTING
PLANTS
SEEDS
TESTING