A HIGH-FREQUENCY INDUCTANCE LEVEL GAUGE FOR LIQUIDS IN INACCESSIBLE LOCATIONS

Technical Report · Tue Oct 01 04:00:00 EDT 1957

OSTI ID:4340841

Davidson, D F; Pilling, J

A new type of level gage has been developed to give remote indications when measuring levels of corrosive and radioactive liquids in inaccessible locations. The principle of operation depends on the variation of inductance of a vertical metal rod which dips into the liquid. The indications are independent of liquid density, and the instrument is capable of a high order of accuracy in suitable conditions. An instrument operated in the laboratory gave an accuracy better than 1% using 1.0 N nitric acid as the liquid; the range of level variation was 40 cm. The probe in contact with the liquid is simple and inherently reliable. With a small number of simple electronic components close to the probe, a remote indication is obtained using a resonance method of inductance measurement. The principle is restricted to liquids of good conductivity, viz. a resistivity of 3 ohm/cm or less. A method of calculating the change in calibration from a perfectly-conducting liquid to one of finite conductivity is shown. The possibility of applying the principle to liquid metal level measurements is considered. (auth)

• Research Organization: Great. Britain Capenhurst Works, Capenhurst, Ches., England
• Sponsoring Organization: United Kingdom Atomic Energy Authority (UKAEA)
• NSA Number: NSA-12-003767
• OSTI ID: 4340841
• Report Number(s): IGR-R/CA-234
• Country of Publication: United Kingdom
• Language: English

Related Subjects

CIRCUITS
ELECTRIC CONDUCTIVITY
ELECTRONIC EQUIPMENT
ERRORS
GAGES
INDUCTION
LEVELS
LIQUID METALS
LIQUIDS
PHYSICS
REMOTE CONTROL
SENSITIVITY
USES