JPS55112527A - Liquid surface detection unit - Google Patents

Liquid surface detection unit

Info

Publication number
JPS55112527A
JPS55112527A JP2051479A JP2051479A JPS55112527A JP S55112527 A JPS55112527 A JP S55112527A JP 2051479 A JP2051479 A JP 2051479A JP 2051479 A JP2051479 A JP 2051479A JP S55112527 A JPS55112527 A JP S55112527A
Authority
JP
Japan
Prior art keywords
electrodes
electrolyte
transistor
exposed
insulating transformer
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.)
Granted
Application number
JP2051479A
Other languages
Japanese (ja)
Other versions
JPS596368B2 (en
Inventor
Toshio Sakai
Toshiji Umetsu
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.)
Sansha Electric Manufacturing Co Ltd
Original Assignee
Sansha Electric Manufacturing Co 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 Sansha Electric Manufacturing Co Ltd filed Critical Sansha Electric Manufacturing Co Ltd
Priority to JP2051479A priority Critical patent/JPS596368B2/en
Publication of JPS55112527A publication Critical patent/JPS55112527A/en
Publication of JPS596368B2 publication Critical patent/JPS596368B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To make detection level difference sure to stabilize operations in liquid surface detection, by providing a hysteresis generation part which changes the operation level of an oscillator between the case where the electrode is soaked in electrolyte and the case where the electrode is exposed.
CONSTITUTION: An astable multivibrator is constituted by transistors Q1 and Q2, resistances R3WR6, capacitors C1 and C2, and insulating transformer PT, and electrodes 3 and 4 are inputted to the secondary side of the insulating transformer. Divided voltages of insulating transformer PT and resistances R5 and R6 are inputted to alarm display instruction AS, and further, the hysteresis generation part which has transistor Q4 to short-circuit resistance R9 when electrodes 3 and 4 are exposed from electrolyte is provided. When electrodes 3 and 4 are exposed from electrolyte, the primary-side voltage of transformer PT becomes high, and transistor Q3 is conductive, and alarm is issued. At this time, transistor Q3 makes transistor Q4 conductive to stabilize the operation of the astable multivibrator, so that a stable alarm output can be obtained even if electrodes are brought into contact with electrolyte due to surface tension.
COPYRIGHT: (C)1980,JPO&Japio
JP2051479A 1979-02-22 1979-02-22 Liquid level detection device Expired JPS596368B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2051479A JPS596368B2 (en) 1979-02-22 1979-02-22 Liquid level detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2051479A JPS596368B2 (en) 1979-02-22 1979-02-22 Liquid level detection device

Publications (2)

Publication Number Publication Date
JPS55112527A true JPS55112527A (en) 1980-08-30
JPS596368B2 JPS596368B2 (en) 1984-02-10

Family

ID=12029257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2051479A Expired JPS596368B2 (en) 1979-02-22 1979-02-22 Liquid level detection device

Country Status (1)

Country Link
JP (1) JPS596368B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57122537U (en) * 1981-01-23 1982-07-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57122537U (en) * 1981-01-23 1982-07-30

Also Published As

Publication number Publication date
JPS596368B2 (en) 1984-02-10

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