JPS5748634A - Isokinetic sampling device - Google Patents

Isokinetic sampling device

Info

Publication number
JPS5748634A
JPS5748634A JP12357680A JP12357680A JPS5748634A JP S5748634 A JPS5748634 A JP S5748634A JP 12357680 A JP12357680 A JP 12357680A JP 12357680 A JP12357680 A JP 12357680A JP S5748634 A JPS5748634 A JP S5748634A
Authority
JP
Japan
Prior art keywords
flow rate
measuring systems
isokinetic
valve
controlled
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
JP12357680A
Other languages
Japanese (ja)
Inventor
Kazuo Watabiki
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 JP12357680A priority Critical patent/JPS5748634A/en
Publication of JPS5748634A publication Critical patent/JPS5748634A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G01N2001/225—Sampling from a flowing stream of gas isokinetic, same flow rate for sample and bulk gas

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

PURPOSE:To make isokinetic suction possible in spite of the case when one of parallel measuring systems stops by providing by-pass lines to the respective measuring systems. CONSTITUTION:The gas sampled by an isokinetic suction probe 2 from an exhaust cylinder 1 is conducted via a piping 3 to parallel measuring systems. Granular radioactive materials and iodine are captured with a capturing device 5, and gaseous radioactive materials are measured with a gas sampler 8. The flow rate is controlled to a constant rate with a flow rate controller 9 to make the velocity of flow at the inlet of the isokinetic suction probe constant. In ordinary measurement, the device is used by holding valves 4, 6 open and a valve 7 close. At the time of calibrating the measuring systems or measuring the level of background radiations, the valve 6 is closed and the valves 7, 11 are opened. Since the flow rate is controlled by a flow rate controller 12 constituted by a needle valve and a flow rate indicator as to be remained unchanged as a total, isokinetic sampling is made possible irrespectively of the operating conditions.
JP12357680A 1980-09-08 1980-09-08 Isokinetic sampling device Pending JPS5748634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12357680A JPS5748634A (en) 1980-09-08 1980-09-08 Isokinetic sampling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12357680A JPS5748634A (en) 1980-09-08 1980-09-08 Isokinetic sampling device

Publications (1)

Publication Number Publication Date
JPS5748634A true JPS5748634A (en) 1982-03-20

Family

ID=14863995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12357680A Pending JPS5748634A (en) 1980-09-08 1980-09-08 Isokinetic sampling device

Country Status (1)

Country Link
JP (1) JPS5748634A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555931A (en) * 1982-04-21 1985-12-03 Horiba, Ltd. Apparatus for measuring or controlling the separation ratio of gas
JPS62140434U (en) * 1986-02-26 1987-09-04
JP2011196838A (en) * 2010-03-19 2011-10-06 Chugoku Electric Power Co Inc:The Radiation measuring device
JP2014137251A (en) * 2013-01-16 2014-07-28 Mitsubishi Electric Corp Dust iodine monitor
JP2014145644A (en) * 2013-01-29 2014-08-14 Toshiba Corp Dust radiation monitoring apparatus and dust radiation monitoring method
CN112683604A (en) * 2020-12-07 2021-04-20 南京波瑞自动化科技有限公司 Constant-speed sampling device for pressure measurement method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5188255A (en) * 1975-01-16 1976-08-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5188255A (en) * 1975-01-16 1976-08-02

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555931A (en) * 1982-04-21 1985-12-03 Horiba, Ltd. Apparatus for measuring or controlling the separation ratio of gas
JPS62140434U (en) * 1986-02-26 1987-09-04
JP2011196838A (en) * 2010-03-19 2011-10-06 Chugoku Electric Power Co Inc:The Radiation measuring device
JP2014137251A (en) * 2013-01-16 2014-07-28 Mitsubishi Electric Corp Dust iodine monitor
JP2014145644A (en) * 2013-01-29 2014-08-14 Toshiba Corp Dust radiation monitoring apparatus and dust radiation monitoring method
CN112683604A (en) * 2020-12-07 2021-04-20 南京波瑞自动化科技有限公司 Constant-speed sampling device for pressure measurement method
CN112683604B (en) * 2020-12-07 2021-11-09 南京波瑞自动化科技有限公司 Constant-speed sampling device for pressure measurement method

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