CH558006A - DEVICE FOR THE AUTOMATIC CHECK OF CONDUCTIVITY LIMIT SWITCHES. - Google Patents

DEVICE FOR THE AUTOMATIC CHECK OF CONDUCTIVITY LIMIT SWITCHES.

Info

Publication number
CH558006A
CH558006A CH1606073A CH1606073A CH558006A CH 558006 A CH558006 A CH 558006A CH 1606073 A CH1606073 A CH 1606073A CH 1606073 A CH1606073 A CH 1606073A CH 558006 A CH558006 A CH 558006A
Authority
CH
Switzerland
Prior art keywords
limit switches
automatic check
conductivity limit
conductivity
check
Prior art date
Application number
CH1606073A
Other languages
German (de)
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH558006A publication Critical patent/CH558006A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
CH1606073A 1972-12-07 1973-11-15 DEVICE FOR THE AUTOMATIC CHECK OF CONDUCTIVITY LIMIT SWITCHES. CH558006A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2259848A DE2259848C3 (en) 1972-12-07 1972-12-07 Arrangement for the automatic checking of the functionality of a conductivity limit indicator

Publications (1)

Publication Number Publication Date
CH558006A true CH558006A (en) 1975-01-15

Family

ID=5863753

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1606073A CH558006A (en) 1972-12-07 1973-11-15 DEVICE FOR THE AUTOMATIC CHECK OF CONDUCTIVITY LIMIT SWITCHES.

Country Status (3)

Country Link
CH (1) CH558006A (en)
DE (1) DE2259848C3 (en)
NL (1) NL7316353A (en)

Also Published As

Publication number Publication date
DE2259848B2 (en) 1974-09-26
NL7316353A (en) 1974-06-11
DE2259848C3 (en) 1975-05-07
DE2259848A1 (en) 1974-07-04

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Legal Events

Date Code Title Description
PL Patent ceased