Corrosion sensor device including side-by-side bar magnets surro

Details Corrosion sensor device including side-by-side bar magnets surro Corrosion sensor device including side-by-side bar magnets surro

1982-02-19

1986-07-01

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324226, 324240, 346 33P, G01N 2772, G01R 3312, G01D 900

Patent

active

045982503

ABSTRACT:
A corrosion probe is disclosed which includes two permanent bar magnets in side-by-side relation, with opposite magnetic orientation and with poles of opposite polarity adjacent a sensing end of the probe, a sensing coil being disposed around the magnets adjacent the sensing end. The probe is disclosed in use in a pipe inspection pig for controlling operation of a camera.

REFERENCES:
patent: 2897438 (1959-07-01), Fearon
patent: 3315154 (1967-04-01), Nattall
patent: 3449662 (1969-06-01), Wood
patent: 4314202 (1982-02-01), Okubo
patent: 4372658 (1983-02-01), O'Connor et al.

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