Device for moisture measurement of particulate material

Details Device for moisture measurement of particulate material Device for moisture measurement of particulate material

1990-01-26

1991-06-11

Wieder, Kenneth

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

340602, 324690, G01R 2726

Patent

active

050235605

ABSTRACT:
A device for measurement of moisture in a body of particulate material, such as a grain in a pile or in a silo, is in the form of a spear with a set of conductive plates 2 carried at one end of a shaft 1 for immersion in the body of particulate material, and a read out meter 4 and carrying handle 3 at the other end of the shaft. Normally the set of conductive plates measure capacitance of the material via a phase locked loop oscillatory circuit. The plates are disposed and shaped to facilitate entry into and removal from the body of particulate material.

REFERENCES:
patent: 2920272 (1960-01-01), Erdman et al.
patent: 3252086 (1966-05-01), Lundstrom
patent: 3581197 (1971-05-01), Morey, Jr. et al.
patent: 3882383 (1975-05-01), Matlin
patent: 3968428 (1976-07-01), Numoto
patent: 4044607 (1977-08-01), Deal
patent: 4228393 (1980-10-01), Pile
patent: 4259632 (1981-03-01), Ahtiainen
patent: 4399404 (1983-08-01), Resh

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