GB1200974A - Improvements in sensing devices - Google Patents

Improvements in sensing devices

Info

Publication number
GB1200974A
GB1200974A GB348168A GB348168A GB1200974A GB 1200974 A GB1200974 A GB 1200974A GB 348168 A GB348168 A GB 348168A GB 348168 A GB348168 A GB 348168A GB 1200974 A GB1200974 A GB 1200974A
Authority
GB
United Kingdom
Prior art keywords
conducting
fluid
substance
jan
electrodes
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.)
Expired
Application number
GB348168A
Inventor
John Mervynings
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.)
English Electric Co Ltd
Original Assignee
English Electric 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB348168A priority Critical patent/GB1200974A/en
Publication of GB1200974A publication Critical patent/GB1200974A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1,200,974. Electric fluid detectors. ENGLISH ELECTRIC CO. Ltd. Jan.22, 1969 [Jan.23, 1968], No.3481/68. Heading G1N. Non-conducting fluid, e.g. water leaks in a cooling system, is detected by a sensing device including a body of porous insulating material 12, e.g. glass sandwiched between two electrodes 10, 11, and a body 8 e.g. a felt pad, containing a conducting substance, e.g. sodium chloride. The device also includes an apertured plastics housing 3, 4. When non-conducting fluid enters the housing it saturates the felt pad 8 and the resultant boine solution is absorbed by the glass body 12 so that the resistance between the electrodes is decreased. An alarm or control function may then be operated. Several of these sensing devices may be connected on parallel across a D.C. source, and the particular device affected may be indicated by including a colouring substance, e.g. potassium permanganate, in the conducting substance. Further, such devices may be used in bridge networks for detecting changes in the conductivity of a fluid at various depths.
GB348168A 1968-01-23 1968-01-23 Improvements in sensing devices Expired GB1200974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB348168A GB1200974A (en) 1968-01-23 1968-01-23 Improvements in sensing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB348168A GB1200974A (en) 1968-01-23 1968-01-23 Improvements in sensing devices

Publications (1)

Publication Number Publication Date
GB1200974A true GB1200974A (en) 1970-08-05

Family

ID=9759135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB348168A Expired GB1200974A (en) 1968-01-23 1968-01-23 Improvements in sensing devices

Country Status (1)

Country Link
GB (1) GB1200974A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182181A (en) * 1985-02-23 1987-05-07 Arthur Leonard Lewis Wet blanket loft sensor
FR2716261A1 (en) * 1994-02-17 1995-08-18 Jpc Ets Detector for humidity measuring device
WO2001006975A1 (en) * 1999-07-22 2001-02-01 Bed-Check Corporation Apparatus for detecting enuresis in a patient

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182181A (en) * 1985-02-23 1987-05-07 Arthur Leonard Lewis Wet blanket loft sensor
FR2716261A1 (en) * 1994-02-17 1995-08-18 Jpc Ets Detector for humidity measuring device
WO2001006975A1 (en) * 1999-07-22 2001-02-01 Bed-Check Corporation Apparatus for detecting enuresis in a patient
US6292102B1 (en) 1999-07-22 2001-09-18 Bed-Check Corporation Apparatus for detecting enuresis in a patient

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees