US3896673A - Continuous automatic liquid sampler - Google Patents

Continuous automatic liquid sampler Download PDF

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Publication number
US3896673A
US3896673A US363176A US36317673A US3896673A US 3896673 A US3896673 A US 3896673A US 363176 A US363176 A US 363176A US 36317673 A US36317673 A US 36317673A US 3896673 A US3896673 A US 3896673A
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United States
Prior art keywords
fluid
bottle
container
sampled
sampling
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Expired - Lifetime
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US363176A
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English (en)
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Bernard Audouze
Guy Bonometti
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Individual
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Individual
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    • 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
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/18—Devices for withdrawing samples in the liquid or fluent state with provision for splitting samples into portions

Definitions

  • the sampler comprises a number of bottles initially filled with an auxiliary fluid of lower density than the fluid to be sampled, and inert in relation to it; each bottle is connected to a central suction pump with an adjustable uniform flow-rate by an electro-valve controlled by a programmed clock, and each bottle is also fitted with a tube conveying liquid to it from a container forming part of a branch circuit from the main flow of liquid; this tube siphons the liquid into each bottle, and it contains an aperture above the maximum level reached by the sample fluid.
  • the main applications of this invention are in the testing of factory effluents and canal and river pollution.
  • the present invention overcomes these drawbacks, ensuring an average sample representing all of the fluid flowing past a given point within a given period without agitating the sample in any way, and without any contact between the fluid and the sampling system, thus removing the possibility of any residual pollution resulting from previous sampling operations and allowing the volume of samples and duration of sampling to be modified considerably, the samples to be kept at a particular temperature, and preventing any alteration in the sample by the addition or removal of fluid by a siphoning effect.
  • This apparatus to take continuous average samples of a flowing fluid comprises, on the one hand a number of bottles, initially filled with an auxiliary fluid, the density of which is lower than the fluid to be sampled, which will not mix with it or affect it in any way, and which occupies the upper part of each bottle during the filling operation.
  • the upper part of each bottle is connected by a tube. ending above the maximum upper level to which the bottle is filled, to a suction pump with an adjustable uniform flow-rate, through an electro-valve controlled by a programmed clock.
  • Each bottle is also connected by a siphon tube, ending at a point near the bottom of the bottle, to a container holding the fluid to be sampled.
  • the container is fed by a pump with a uniform flow rate, which removes fluid from the channel through which it flows, and is continuously emptied back into this channel, downstream of the sampling point, through an overflow spout.
  • Means are provided for subordinating the motor driving the suction pump to the readings of a flowmeter in the channel.
  • the tube conveying the sample of fluid from the central container to each bottle contains an aperture located above the maximum upper level reached by the sample of fluid.
  • each bottle is connected to the suction pump. through a separate electrovalve, and by a siphon tube to the container holding the fluid to be sampled.
  • samples can be collected in several bottles at once, by programmed simultaneous operation of the electro-valves connected to each of them.
  • FIG. I is a schematic illustration of a sampling system in accordance with the invention.
  • FIG. 2 is a top view of a portion of a preferred embodiment of the invention.
  • An apparatus such as the one shown in FIG. I contains a series of bottles (e.g. l and 2). placed for convenience in one or more concentric circles on a base (not shown here).
  • a container 3 In the centre of the circle or circles is a container 3, which is fed at a uniform rate by a pump 4 with fluid drawn from a point 5 in the channel 6 containing the fluid to be sampled.
  • Container 3 has an overflow pipe 7, which discharges the fluid back into the channel, downstream of the sampling point.
  • Each of bottles is hermetically sealed with a stopper 8, through which p sses a filling tube 9, consisting of an upturned U-shaped tube, one arm of which goes into the container 3 while the other projects into the bottles 1 and 2 respectively to a point 10 one or two centimetres from the bottom.
  • An aperture 11 is provided in each tube 9 beneath the bottle stopper and above the maximum level reached by the sample of fluid.
  • the auxiliary fluid initially filling each bottle is sucked out, through a separate other pipe 12 passing through the bottom stopper, by a peristaltic pump 13, of the type in which flexible pipes are squeezed, for instance, with an adjustable uniform flow-rate.
  • Each bottle is connected to a three-way electro-valve 14, one outlet leading to the pump 13, the second to the respective sample bottle, and the third allowing the pressure inside the bottle to be regulated to match the pressure prevailing above the fluid to be sampled, namely atmospheric pressure in the case of open-air channels.
  • Each electro-valve 14 is connected to a central control device 15, comprising an electronic clock 16 and means for selecting the sampling program 17.
  • the suction pump 13 is controlled by a mechanism 18, which subordinates it to the readings of a flowmeter l9, placed in the channel close to the sampling point 5. In this way, the rate of sampling is kept proportional to the flow-rate in the channel.
  • FIG. 2 represents part of the same apparatus seen from above, showing one half of a base containing twelve positions for bottles (e.g. 1), the central container 3, pipe 12 to suck out the auxiliary fluid, and three-way eIectro-valve 14.
  • Each of the bottles are enclosed in a casing (not shown) containing a heat-insulating material such as glass wool, so that if a refrigerating device is added, the temperature of the samples can be kept at 2 or 4C, which is essential for the biological protection and analysis of the samples.
  • a heat-insulating material such as glass wool
  • Another type of apparatus comprising groups of bottles, each group containing the number of bottles required for a sample.
  • Each bottle in these groups has its own siphon tube and suction pipe connected to an electro-valve, and the electro-valves for each group are operated simultaneously, in accordance with a program selected at the central control point.
  • the apparatus operates as follows.
  • Bottles and pipes are placed in position, and the three-way electro-valves are adjusted to place the inside of each bottle in communication with the space above the channel of fluid to be sampled; in other words, if sampling takes place in the open air, and air is used as the auxiliary fluid in the bottles, the bottles and pipes will be at atmospheric pressure.
  • auxiliary fluid may be selected such as an inert gas or liquid of lower density than the fluid to be sampled. and which will not mix with it.
  • the sampling operation begins.
  • the electro-valve for bottle n 1 connects it to the suction pump.
  • a depression of a few millimetres of mercury draws fluid from the central container, after a few seconds delay.
  • the rate of sampling remains proportional to the flow-rate of fluid in the channel so that the contents of the bottle are a representative average sample of the fluid flowing past during the period of sampling.
  • the control system disconnects bottle n 1 from the suction pump, and regulates the pressure in the bottle to match the pressure above the central container. The same operation begins immediately thereafter for bottle n 2.
  • control system comprises two programs, for hourly or two-hourly sampling. Other programs can be added.
  • the flow-rate of the suction pump can be adjusted in various ways, either intermittently, by changing the diameter or number of the flexible pipes, or continuously, by regulating the speed of movement of the rollers. If the apparatus has been suitably assembled, the flow-rate can be adjusted by altering the diameter or number of pipes during sampling, while the other method is normally used when sampling is subordinated to readings from a flowmeter operating continu ously in the channel.
  • the samples When stored, the samples are protected against any risk of further liquid entering or being siphoned off during storage, by the aperture on the sampling tube, be-
  • the number of identical samples obtained during one sampling operation is the same as the number of electro-valves in each group
  • An apparatus for continuously taking average samples of a fluid flowing in a channel comprising a container for holding fluid to be sampled, pump means connected to feed fluid to be sampled at a uniform flow rate from a sampling point of said channel to said container, overflow spout means connected to empty fluid from said container back to said channel at a point below said sampling point in the direction of flow of fluid in said channel, a plurality of sampling bottles, an auxiliary fluid in said bottles, said auxiliary fluid having a density lower than the density of said fluid to be sampled and which will not mix with nor effect the fluid to be sampled in any manner, a suction pump having an adjustable uniform flow rate, tube means connected between said suction pump and the upper portion of each bottle, said tube means terminating above the maximum upper level to which the respective bottle is to be filled during a sampling operation.
  • electro-valve means connectedto control flow of fluid in said tube means, programmed clock means connected to control said electro-valve ,means, and separate siphon tubes connecting each of said bottles. at a point near the bottom thereof. to said container, whereby suction applied to each bottle during a filling operation draws fluid to be sampled from said container to the respective bottle. and the auxiliary fluid in the respective bottle consequently occupies the upper portion of the respective bottle.
  • each said bottle is connected to said suction pump by a separate electro-valve in the respective tube means, and each said bottle is connected to said container by a separate siphon tube.
  • An apparatus for continuously sampling a fluid flowing in a channel comprising a container for holding the fluid to be sampled, pump means for continuously directing fluid from a sampling point of said channel to said container at a uniform rate, overflow means for feeding back fluid from said container to said channel at a point below said sampling point in the direction of flow of fluid therein for maintaining the level of fluid in said container, a plurality of sealed bottles, suction pump means, a separate electro-valve for each said bottle, tube means connecting the upper portion of each said bottle by way of the respective clectro-valve to said suction pump means, separate siphon means coupled between the bottom portion of each said bottle to said container, such siphon means having apertures above the maximum level within each bottle to which the respective bottle is to be filled during'a sampling operation, and an auxiliary fluid in each bottle, said auxiliary fluid having a density less than the density of said fluid to be sampled and being immiscible with and chemically inert with respect to said fluid to be sampled.

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (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)
US363176A 1972-05-29 1973-05-22 Continuous automatic liquid sampler Expired - Lifetime US3896673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7219128A FR2187115A5 (de) 1972-05-29 1972-05-29

Publications (1)

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US3896673A true US3896673A (en) 1975-07-29

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US363176A Expired - Lifetime US3896673A (en) 1972-05-29 1973-05-22 Continuous automatic liquid sampler

Country Status (12)

Country Link
US (1) US3896673A (de)
JP (1) JPS5627819B2 (de)
BE (1) BE800114A (de)
CA (1) CA994127A (de)
CH (1) CH580276A5 (de)
DE (1) DE2327427A1 (de)
ES (1) ES415318A1 (de)
FR (1) FR2187115A5 (de)
GB (1) GB1380544A (de)
IT (1) IT987892B (de)
LU (1) LU67680A1 (de)
NL (1) NL7307505A (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986401A (en) * 1975-10-14 1976-10-19 The United States Of America As Represented By The Secretary Of The Interior Composite sampling method and system
US4022059A (en) * 1974-03-28 1977-05-10 Manning Environmental Corporation Flow and time proportional sampling system
US4450730A (en) * 1981-04-08 1984-05-29 Commissariat A L'energie Atomique Liquid sampler wherein solution to be sampled is used as retrievable sampler wash
US4596156A (en) * 1983-06-04 1986-06-24 Horiba, Ltd. Sample gas extracting apparatus
US4649967A (en) * 1983-09-08 1987-03-17 University Of Cincinnati Multiple efflux apparatuses for transferring fluid
US4655094A (en) * 1983-06-30 1987-04-07 Erweka Apparatebau Gmbh Device for taking and measuring samples
WO1988007667A1 (en) * 1987-03-26 1988-10-06 Ryan Rosenberg A method of and an apparatus for taking a sample from a fluid flowing through a conduit
DE3739772A1 (de) * 1987-11-24 1989-06-08 Metallgesellschaft Ag Vorrichtung zum entnehmen von fluessigkeitsproben
US5029485A (en) * 1989-10-10 1991-07-09 Southern California Edison Apparatus and method for remotely sampling fluid
US5167802A (en) * 1990-07-26 1992-12-01 The United States Of America As Represented By The Secretary Of The Interior Apparatus for sampling pesticide residues in run-off with control of sample pump and distributor valve
US5256117A (en) * 1990-10-10 1993-10-26 Stairmaster Sports Medical Products, Inc. Stairclimbing and upper body, exercise apparatus
US5279167A (en) * 1992-06-09 1994-01-18 Roger Peterson Method and apparatus for providing a sample for testing for volatile emissions
WO1995002176A1 (en) * 1993-07-08 1995-01-19 Isco, Inc. Method and apparatus for sampling fluids
US5396812A (en) * 1992-06-09 1995-03-14 Peterson; Roger Sample system
DE29608615U1 (de) * 1996-05-11 1996-08-08 SBF Wasser und Umwelt Zweigniederlassung der Preussag Anlagenbau GmbH, 31228 Peine Druckausgleichs- und Probeentnahmegefäß
ES2116825A1 (es) * 1994-02-10 1998-07-16 Almarcha Morell Manuel Procedimiento y su correspondiente aparato para la captacion controlada de muestras de masas liquidas que contienen contaminantes .
US6152189A (en) * 1993-03-30 2000-11-28 Isco, Inc. Sampler
US20020025255A1 (en) * 1993-03-30 2002-02-28 Isco, Inc. Sampler
US20030051565A1 (en) * 2001-09-17 2003-03-20 Nimberger Spencer M. Heated enclosure purge system
US6925895B2 (en) * 2001-07-02 2005-08-09 Hampton Roads Sanitation District Sample collection system
CN102539198A (zh) * 2012-01-19 2012-07-04 中国科学院广州地球化学研究所 河流断面有机污染物等比例在线富集采样器
CN104020017A (zh) * 2014-06-23 2014-09-03 南通永康检测技术有限公司 一种污水采样装置
US20220276215A1 (en) * 2019-10-08 2022-09-01 Kurita Water Industries Ltd. Water sampling device for water quality measurement
US12130273B2 (en) * 2019-10-08 2024-10-29 Kurita Water Industries Ltd. Water sampling device for water quality measurement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475223A1 (fr) * 1980-02-05 1981-08-07 Kronenbourg Brasseries Appareil autonome de prelevement isobarometrique pour prise d'echantillons sur boissons gazeuses
WO2019058486A1 (ja) 2017-09-21 2019-03-28 三菱電機株式会社 固定子、電動機および換気扇
CN112255048B (zh) * 2020-11-17 2023-12-01 佳木斯大学 一种基础医学用检验取样装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284560A (en) * 1940-08-10 1942-05-26 Standard Oil Dev Co Sampling-proportioning device
US3362222A (en) * 1965-07-14 1968-01-09 Walter K. Johnson Fluid sampling apparatus and flowmeter
US3478596A (en) * 1967-09-11 1969-11-18 Gen Electric Wastewater sampling apparatus
US3681995A (en) * 1969-06-09 1972-08-08 Peter Paatzsch Devices for the transfer of sample liquid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284560A (en) * 1940-08-10 1942-05-26 Standard Oil Dev Co Sampling-proportioning device
US3362222A (en) * 1965-07-14 1968-01-09 Walter K. Johnson Fluid sampling apparatus and flowmeter
US3478596A (en) * 1967-09-11 1969-11-18 Gen Electric Wastewater sampling apparatus
US3681995A (en) * 1969-06-09 1972-08-08 Peter Paatzsch Devices for the transfer of sample liquid

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022059A (en) * 1974-03-28 1977-05-10 Manning Environmental Corporation Flow and time proportional sampling system
US3986401A (en) * 1975-10-14 1976-10-19 The United States Of America As Represented By The Secretary Of The Interior Composite sampling method and system
US4450730A (en) * 1981-04-08 1984-05-29 Commissariat A L'energie Atomique Liquid sampler wherein solution to be sampled is used as retrievable sampler wash
US4596156A (en) * 1983-06-04 1986-06-24 Horiba, Ltd. Sample gas extracting apparatus
US4655094A (en) * 1983-06-30 1987-04-07 Erweka Apparatebau Gmbh Device for taking and measuring samples
US4649967A (en) * 1983-09-08 1987-03-17 University Of Cincinnati Multiple efflux apparatuses for transferring fluid
WO1988007667A1 (en) * 1987-03-26 1988-10-06 Ryan Rosenberg A method of and an apparatus for taking a sample from a fluid flowing through a conduit
DE3739772A1 (de) * 1987-11-24 1989-06-08 Metallgesellschaft Ag Vorrichtung zum entnehmen von fluessigkeitsproben
US5029485A (en) * 1989-10-10 1991-07-09 Southern California Edison Apparatus and method for remotely sampling fluid
US5167802A (en) * 1990-07-26 1992-12-01 The United States Of America As Represented By The Secretary Of The Interior Apparatus for sampling pesticide residues in run-off with control of sample pump and distributor valve
US5256117A (en) * 1990-10-10 1993-10-26 Stairmaster Sports Medical Products, Inc. Stairclimbing and upper body, exercise apparatus
US5279167A (en) * 1992-06-09 1994-01-18 Roger Peterson Method and apparatus for providing a sample for testing for volatile emissions
US5396812A (en) * 1992-06-09 1995-03-14 Peterson; Roger Sample system
US6790674B2 (en) * 1993-03-30 2004-09-14 Isco, Inc. Sampler
US6152189A (en) * 1993-03-30 2000-11-28 Isco, Inc. Sampler
US20020025255A1 (en) * 1993-03-30 2002-02-28 Isco, Inc. Sampler
WO1995002176A1 (en) * 1993-07-08 1995-01-19 Isco, Inc. Method and apparatus for sampling fluids
US5546818A (en) * 1993-07-08 1996-08-20 Isco, Inc. Fluid sampling apparatus having a universal base
US5726360A (en) * 1993-07-08 1998-03-10 Isco, Inc. Fluid sampling apparatus having a universal base
ES2116825A1 (es) * 1994-02-10 1998-07-16 Almarcha Morell Manuel Procedimiento y su correspondiente aparato para la captacion controlada de muestras de masas liquidas que contienen contaminantes .
DE29608615U1 (de) * 1996-05-11 1996-08-08 SBF Wasser und Umwelt Zweigniederlassung der Preussag Anlagenbau GmbH, 31228 Peine Druckausgleichs- und Probeentnahmegefäß
US6925895B2 (en) * 2001-07-02 2005-08-09 Hampton Roads Sanitation District Sample collection system
US6854346B2 (en) * 2001-09-17 2005-02-15 Pgi International, Ltd. Purging system for use with a gas sampling system
US20030051565A1 (en) * 2001-09-17 2003-03-20 Nimberger Spencer M. Heated enclosure purge system
CN102539198A (zh) * 2012-01-19 2012-07-04 中国科学院广州地球化学研究所 河流断面有机污染物等比例在线富集采样器
CN104020017A (zh) * 2014-06-23 2014-09-03 南通永康检测技术有限公司 一种污水采样装置
US20220276215A1 (en) * 2019-10-08 2022-09-01 Kurita Water Industries Ltd. Water sampling device for water quality measurement
US12130273B2 (en) * 2019-10-08 2024-10-29 Kurita Water Industries Ltd. Water sampling device for water quality measurement

Also Published As

Publication number Publication date
NL7307505A (de) 1973-12-03
CH580276A5 (de) 1976-09-30
JPS4951997A (de) 1974-05-20
BE800114A (fr) 1973-09-17
FR2187115A5 (de) 1974-01-11
JPS5627819B2 (de) 1981-06-27
CA994127A (fr) 1976-08-03
IT987892B (it) 1975-03-20
DE2327427A1 (de) 1973-12-13
GB1380544A (en) 1975-01-15
ES415318A1 (es) 1976-02-01
LU67680A1 (de) 1973-08-02

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