JPS5676014A - Measuring device for liquid level at extreme low temperature - Google Patents

Measuring device for liquid level at extreme low temperature

Info

Publication number
JPS5676014A
JPS5676014A JP15296279A JP15296279A JPS5676014A JP S5676014 A JPS5676014 A JP S5676014A JP 15296279 A JP15296279 A JP 15296279A JP 15296279 A JP15296279 A JP 15296279A JP S5676014 A JPS5676014 A JP S5676014A
Authority
JP
Japan
Prior art keywords
liquid level
level indicator
power source
switching apparatus
continuous liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15296279A
Other languages
Japanese (ja)
Inventor
Takehide Kawasaki
Koichi Takemaru
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15296279A priority Critical patent/JPS5676014A/en
Publication of JPS5676014A publication Critical patent/JPS5676014A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE: To reduce a heat generation from a continuous liquid level indicator as little as possible by a method wherein a switching apparatus is installed between a power source line for a measuring element and the power source for a measuring element and a current is supplied only to a continuous liquid level indicator which is in contact with the liquid level of the extremely low temperature liquid.
CONSTITUTION: A measurement signal line 3 and a power source line 4 of a continuous liquid level indicator 2 installed in a liquid He container are connected to each contact of a switching apparatus 5, respectively. There are two sets of output of the switching apparatus 5. Each of them is connected to a voltmeter 8 to measure a terminal voltage of the continuous liquid level indicator 2 and to a power source 6 for measuring elements to supply a constant current to the continuous liquid level indicator 2. Since the switching apparatus 5 can change-over two circuits at a same time, each one unit for each of the voltmeter 8 and the power source for measuring elements is enough for the use. However, the dial of the voltmeter is of 4 kinds. When an indication of a voltmeter becoms a full scale, the operation of the switching apparatus is performed manually. In this way, heat generation can be reduced extremely small from a continuous liquid level indicator.
COPYRIGHT: (C)1981,JPO&Japio
JP15296279A 1979-11-28 1979-11-28 Measuring device for liquid level at extreme low temperature Pending JPS5676014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15296279A JPS5676014A (en) 1979-11-28 1979-11-28 Measuring device for liquid level at extreme low temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15296279A JPS5676014A (en) 1979-11-28 1979-11-28 Measuring device for liquid level at extreme low temperature

Publications (1)

Publication Number Publication Date
JPS5676014A true JPS5676014A (en) 1981-06-23

Family

ID=15551955

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15296279A Pending JPS5676014A (en) 1979-11-28 1979-11-28 Measuring device for liquid level at extreme low temperature

Country Status (1)

Country Link
JP (1) JPS5676014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013156036A (en) * 2012-01-26 2013-08-15 Toshiba Corp Liquid level detecting device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013156036A (en) * 2012-01-26 2013-08-15 Toshiba Corp Liquid level detecting device and method

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