IT947365B - Circuito di misura ad auto regola zione a guadagno variabile per un monitore di nuclei di condensazione - Google Patents

Circuito di misura ad auto regola zione a guadagno variabile per un monitore di nuclei di condensazione

Info

Publication number
IT947365B
IT947365B IT20304/72A IT2030472A IT947365B IT 947365 B IT947365 B IT 947365B IT 20304/72 A IT20304/72 A IT 20304/72A IT 2030472 A IT2030472 A IT 2030472A IT 947365 B IT947365 B IT 947365B
Authority
IT
Italy
Prior art keywords
monitor
self
variable gain
measuring circuit
adjustable measuring
Prior art date
Application number
IT20304/72A
Other languages
English (en)
Original Assignee
Environment One Corp
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 Environment One Corp filed Critical Environment One Corp
Application granted granted Critical
Publication of IT947365B publication Critical patent/IT947365B/it

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/065—Investigating concentration of particle suspensions using condensation nuclei counters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Amplifiers (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
IT20304/72A 1971-02-08 1972-02-07 Circuito di misura ad auto regola zione a guadagno variabile per un monitore di nuclei di condensazione IT947365B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11356171A 1971-02-08 1971-02-08

Publications (1)

Publication Number Publication Date
IT947365B true IT947365B (it) 1973-05-21

Family

ID=22350143

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20304/72A IT947365B (it) 1971-02-08 1972-02-07 Circuito di misura ad auto regola zione a guadagno variabile per un monitore di nuclei di condensazione

Country Status (7)

Country Link
US (1) US3678488A (it)
CA (1) CA1003524A (it)
CH (1) CH549250A (it)
DE (1) DE2205690A1 (it)
FR (1) FR2128315B1 (it)
GB (2) GB1379921A (it)
IT (1) IT947365B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2327497C3 (de) * 1973-05-30 1981-12-24 Benno 5430 Wettingen Aargau Perren Melder für Widerstandsänderungen mit nachgeschalteter Alarmeinrichtung
GB8913773D0 (en) * 1989-06-15 1989-08-02 Fire Fighting Enterprises Uk L Particle detectors
JP3231886B2 (ja) * 1993-03-31 2001-11-26 能美防災株式会社 光電式火災感知器
JP4396079B2 (ja) † 2000-03-28 2010-01-13 パナソニック電工株式会社 粒子センサー
US9239025B2 (en) * 2009-06-29 2016-01-19 GM Global Technology Operations LLC Condensation detection systems and methods
CN113327395A (zh) * 2021-05-13 2021-08-31 蚌埠依爱消防电子有限责任公司 一种扩大光电式烟雾探测器响应量程的方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618061A (en) * 1969-04-30 1971-11-02 Eaton Yale & Towne Monitoring apparatus for monitoring the density of a material carried by a fluid and the flow of the fluid

Also Published As

Publication number Publication date
US3678488A (en) 1972-07-18
GB1379922A (en) 1975-01-08
GB1379921A (en) 1975-01-08
DE2205690A1 (de) 1972-08-10
CH549250A (de) 1974-05-15
CA1003524A (en) 1977-01-11
FR2128315A1 (it) 1972-09-22
FR2128315B1 (it) 1976-08-20

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