KR100464667B1 - Automatic Intermittent Flow Respirometer - Google Patents
Automatic Intermittent Flow Respirometer Download PDFInfo
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- KR100464667B1 KR100464667B1 KR10-2002-0015415A KR20020015415A KR100464667B1 KR 100464667 B1 KR100464667 B1 KR 100464667B1 KR 20020015415 A KR20020015415 A KR 20020015415A KR 100464667 B1 KR100464667 B1 KR 100464667B1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 17
- 230000000241 respiratory effect Effects 0.000 claims abstract description 11
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims 1
- 230000000153 supplemental effect Effects 0.000 abstract description 14
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 10
- 230000036284 oxygen consumption Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000009531 respiratory rate measurement Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00584—Control arrangements for automatic analysers
- G01N35/00594—Quality control, including calibration or testing of components of the analyser
- G01N35/00693—Calibration
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
본 발명은 자동 호흡측정장치에 관한 것으로, 물이 순환하는 폐루프로 된 메인순환루프(10)와, 상기 메인순환루프(10)상에 연통되게 설치되고 피실험생물을 담는 생물저장조(30)와, 상기 메인순환루프(10)에 병렬로 연결되어 상기 메인순환루프(10)로 산소가 포화용존된 보충수를 공급하는 보조순환루프(15) 및, 상기 메인순환루프(10)내의 용존산소량을 측정하여 상기 보조순환루프(15)를 메인순환루프(10)와 연통시키는 연산제어부(80)를 포함하여, 용존산소농도와 대기압을 자동으로 보정하여 생물의 호흡상태를 장시간 측정할 수 있도록 된 것이다.The present invention relates to an automatic breathing apparatus, the main circulation loop 10 is a closed loop through which water is circulated, and the biological storage tank 30 installed in communication with the main circulation loop 10 and containing the test subject. And an auxiliary circulation loop 15 connected in parallel to the main circulation loop 10 and supplying supplemental water in which oxygen is saturated and dissolved into the main circulation loop 10, and the amount of dissolved oxygen in the main circulation loop 10. Including the operation control unit 80 to communicate the auxiliary circulation loop 15 with the main circulation loop 10 by automatically measuring the dissolved oxygen concentration and atmospheric pressure to be able to measure the respiratory state of the organism for a long time will be.
Description
본 발명은 수서생물의 호흡시 산소소비량을 측정하는 호흡측정장치에 관한 것이다.The present invention relates to a respiratory measuring device for measuring the oxygen consumption in the respiration of aquatic organisms.
일반적으로, 호흡측정장치는 일정량의 산소가 용존된 물에서 생물의 호흡에 의해 감소하는 산소량을 측정함으로써 수중에서 서식하는 수서생물의 호흡상태를 간접적으로 측정할 수 있는 실험장치이다.In general, the respiratory measuring device is an experimental device that can indirectly measure the respiratory state of aquatic organisms in water by measuring the amount of oxygen reduced by the respiration of living organisms in the water in which a certain amount of oxygen is dissolved.
종래의 호흡측정장치는 용존산소를 측정할 수 있는 센서만 부착되어 자료를 단순히 수치화하거나 아날로그 방식으로 나타내고, 온도와 염분도 및 수시로 변화하는 대기압을 수작업으로 보정하여야 하므로, 장시간 측정하지 못하는 문제점이 있었다.Conventional respiratory measurement device has only a sensor that can measure the dissolved oxygen, the data is simply digitized or represented in an analog method, and the temperature and salinity and the atmospheric pressure that changes frequently, there is a problem that can not be measured for a long time.
또한, 종래의 호흡측정장치는 생물의 호흡에 의해 용존된 산소량이 일정치 이하로 감소하게 되면 생물의 생존을 위해 새로운 물로 교체해야 하는데, 이러한 교체작업이 수작업으로 이루어져 불편할 뿐만 아니라, 실험오차를 크게 하는 문제점이 있었다.In addition, the conventional respiratory measuring device should be replaced with new water for the survival of the organisms when the amount of dissolved oxygen is reduced to a certain level or less by the breathing of the organism, this replacement work is not only inconvenient because of manual work, but also greatly increases the experimental error There was a problem.
이에 본 발명은 상기한 바의 제반 문제점들을 해소하기 위해 안출된 것으로, 순환수의 용존산소와 대기압을 자동으로 보정하여 생물의 호흡상태를 장시간 측정할 수 있는 자동 호흡측정장치를 제공함에 그 목적이 있다.Therefore, the present invention has been made to solve the above problems, the object of the present invention is to provide an automatic respiratory measuring device that can measure the respiratory state of the organism for a long time by automatically correcting the dissolved oxygen and atmospheric pressure of the circulating water have.
상기한 바의 목적을 달성하기 위한 본 발명은, 물이 순환하는 폐루프로 된메인순환루프와, 상기 메인순환루프상에 연통되게 설치되고 피실험생물을 담는 생물저장조와, 상기 메인순환루프에 병렬로 연결되어 상기 메인순환루프로 산소가 포화용존된 보충수를 공급하는 보조순환루프 및, 상기 메인순환루프 내의 용존산소량을 측정하여 상기 보조순환루프를 메인순환루프와 연통시키는 연산제어부를 포함한다.The present invention for achieving the above object is, the main circulation loop made of a closed loop in which water is circulated, a biological storage tank installed in communication on the main circulation loop and containing a test subject, and the main circulation loop. A secondary circulation loop connected in parallel to supply the supplementary water in which oxygen is saturated and dissolved in the main circulation loop, and an operation control unit configured to communicate the auxiliary circulation loop with the main circulation loop by measuring an amount of dissolved oxygen in the main circulation loop. .
따라서, 상기 메인순환루프 내의 산소용존량을 측정하여 그 데이타값에 따라 보조순환루프와 메인순환루프를 자동으로 연통시킴으로써 메인순환루프 내의 용존산소량를 자동으로 보정할 수 있어 장시간 실험을 할 수 있게 되는 것이다.Therefore, by measuring the dissolved oxygen amount in the main circulation loop and automatically communicating the auxiliary circulation loop and the main circulation loop according to the data value, it is possible to automatically correct the dissolved oxygen amount in the main circulation loop so that the experiment can be performed for a long time. .
도 1은 본 발명에 따른 자동 호흡측정장치를 나타낸 구성도,1 is a block diagram showing an automatic breathing apparatus according to the present invention,
도 2는 본 발명에 따른 자동 호흡측정장치의 산소측정시 물의 순환상태를 나타낸 구성도,Figure 2 is a block diagram showing the circulation state of the water at the time of oxygen measurement of the automatic breathing apparatus according to the present invention,
도 3은 본 발명에 따른 자동 호흡측정장치의 보충수 공급시 물의 순환상태를 나타낸 구성도이다.Figure 3 is a block diagram showing the circulation state of the water when supplying supplemental water of the automatic breathing apparatus according to the present invention.
* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10 : 메인순환루프 15 : 보조순환루프10: main circulation loop 15: auxiliary circulation loop
20 : 순환펌프 21 : 펌프제어부20: circulation pump 21: pump control unit
30 : 생물저장조 31 : 순환수 출입구30: biological storage tank 31: circulating water entrance
32 : 순환수 배출구 40 : 산소센서32: circulating water outlet 40: oxygen sensor
41 : 피코암페어메타 42 : 온도센서41: picoamp meter 42: temperature sensor
43 : 기압센서 50 : 3방향밸브43: barometric pressure sensor 50: 3-way valve
51 : 압축기 52 : 액츄에이터51: Compressor 52: Actuator
60 : 보충수 개폐밸브 70 : 보충수저장조60: make-up water closing valve 70: make-up water storage tank
80 : 연산제어부 81 : 밸브제어부80: operation control unit 81: valve control unit
이하 본 발명을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 자동 호흡측정장치를 나타낸 구성도이고, 도 2는 본 발명에 따른 자동 호흡측정장치의 산소측정시 물의 순환상태를 나타낸 구성도이며, 도 3은 본 발명에 따른 자동 호흡측정장치의 보충수 공급시 물의 순환상태를 나타낸 구성도이다.1 is a block diagram showing an automatic breathing apparatus according to the present invention, Figure 2 is a block diagram showing the circulation state of the water at the time of oxygen measurement of the automatic breathing apparatus according to the present invention, Figure 3 is an automatic breathing according to the present invention This is a block diagram showing the circulation of water when supplying supplemental water to the measuring device.
본 발명에 따른 자동 호흡측정장치는, 물이 순환하는 폐루프로 된 메인순환루프(10)와, 상기 메인순환루프(10)상에 연통되게 설치되고, 측정하고자 하는 생물을 담는 생물저장조(30)와, 상기 메인순환루프(10)에 병렬로 연결되어 상기 메인순환루프(10)로 보충수를 공급하는 보조순환루프(15) 및, 상기 메인순환루프(10)내의 용존산소량을 토대로 생물의 호흡상태를 측정하는 연산제어부(80)를 포함한다.The automatic respiration measuring apparatus according to the present invention is installed in communication with the main circulation loop 10 of the closed loop in which water is circulated, and the main circulation loop 10, and the biological storage tank 30 containing the organisms to be measured. ) And an auxiliary circulation loop 15 connected in parallel to the main circulation loop 10 to supply replenishment water to the main circulation loop 10, and based on the dissolved oxygen in the main circulation loop 10. It includes a calculation control unit 80 for measuring the respiratory state.
상기 메인순환루프(10)는 순환수가 채워진 폐루프를 형성하고,펌프제어부(21)에 의해 작동하는 순환펌프(20)로 순환시키게 되며, 상기 생물저장조(30)의 물을 순환시키게 된다.The main circulation loop 10 forms a closed loop filled with circulating water, circulates into a circulating pump 20 operated by the pump control unit 21, and circulates water in the biological storage tank 30.
상기 생물저장조(30)는 물이 채워지고 호흡을 측정하고자 하는 생물을 담아 활동할 수 있게 하는 수조로, 순환수 출입구(31)와 순환수 배출구(32)가 구비되어 상기 메인순환루프(10)와 연통되고, 유입되는 물과 배출되는 물의 양을 동일하게 하여 메인순환루프(10)와 일체로 물이 순환하게 된다.The biological storage tank 30 is a tank that is filled with water to enable the activity to contain the organism to measure breathing, the circulation water inlet 31 and the circulation water outlet 32 is provided with the main circulation loop 10 and In communication, the water is circulated integrally with the main circulation loop 10 by equalizing the amount of incoming water and discharged water.
상기 메인순환루프(10) 상에는 메인순환루프(10)내의 물에 용존된 산소량을 감지하는 산소센서(40)와, 순환수의 온도를 감지하는 온도센서(42)가 연결되어 있다.On the main circulation loop 10, an oxygen sensor 40 for detecting the amount of oxygen dissolved in water in the main circulation loop 10 and a temperature sensor 42 for sensing the temperature of the circulating water are connected.
상기 산소센서(40)는 상기 메인순환루프(10) 내의 순환수에 용존된 미세한 산소량을 감지하고, 산소센서(40)에서 송출되는 전기신호를 증폭하여 상기 연산제어부(80)로 송출하는 피코암페어메타(41)가 연결되어 있다.The oxygen sensor 40 detects a small amount of oxygen dissolved in the circulation water in the main circulation loop 10, amplifies an electric signal transmitted from the oxygen sensor 40, and sends the picoamp to the operation control unit 80. The meta 41 is connected.
상기 메인순환루프(10)에 그 메인순환루프(10) 내로 산소가 포화용존된 보충수를 공급하는 보조순환루프(15)가 병렬로 연결되어 있고, 메인순환루프(10)와 보조순환루프(15)의 연결지점에는 3방향밸브(50)와 보충수 개폐밸브(60)가 각각 설치되어 있으며, 상기 보조순환루프(15) 상에는 보충수저장조(70)가 구비되어 있다.An auxiliary circulation loop 15 for supplying supplemental water in which oxygen is saturated and dissolved into the main circulation loop 10 is connected in parallel to the main circulation loop 10, and the main circulation loop 10 and the auxiliary circulation loop ( 15, a three-way valve 50 and a supplemental water open / close valve 60 are provided, respectively, and a supplemental water storage tank 70 is provided on the auxiliary circulation loop 15.
상기 3방향밸브(50)는 상기 메인순환루프(10)를 폐루프로 만들거나 메인순환루프(10)와 보조순환루프(15)를 선택적으로 연통시키게 되고, 압축기(51)를 통해 작동하는 액츄에이터(52)에 의해 작동된다.The three-way valve 50 makes the main circulation loop 10 as a closed loop or selectively communicates the main circulation loop 10 with the auxiliary circulation loop 15 and operates through the compressor 51. It is operated by 52.
상기 보충수 개폐밸브(60)는 상기 메인순환루프(10)와 보조순환루프(15)를연통시켜 상기 보충수저장조(70)의 보충수를 메인순환루프(10)로 공급하게 된다.The make-up water opening and closing valve 60 communicates the main circulation loop 10 and the auxiliary circulation loop 15 to supply the supplementary water of the supplemental water storage tank 70 to the main circulation loop 10.
상기 보충수저장조(70)는 상기 보조순환루프(15)상에 설치되고, 용존산소가 포화된 보충수를 저장하며, 메인순환루프(10)에서 3방향밸브(50)를 통해 투입되는 순환수의 양과 보충수 개폐밸브(60)를 통해 메인순환루프(10)로 배출하는 보충수의 양을 동일하게 유지하여 메인순환루프(10)로 공기가 유입되지 않게 된다.The replenishment water storage tank 70 is installed on the auxiliary circulation loop 15, stores replenishment water saturated with dissolved oxygen, and is circulated water introduced through the three-way valve 50 from the main circulation loop 10. By maintaining the amount of and the amount of supplemental water discharged to the main circulation loop 10 through the make-up water opening and closing valve 60, the air is not introduced into the main circulation loop (10).
상기 연산제어부(80)는 상기 피코암페어메타(41)에서 증폭된 용존산소량에 대한 데이타를 전기신호로 입력받고, 상기 온도센서(42)에서 송출되는 전기신호를 입력받으며, 기압센서(43)에서 대기압에 대한 데이타를 전기신호로 입력받아, 산소소비율을 연산하여 생물의 호흡상태를 디스플레이하고, 상기 메인순환루프(10) 내의 산소포화도가 일정치 이하가 되면 밸브제어부(81)를 통해 상기 3방향밸브(50)와 보충수 개폐밸브(60)를 작동시켜 측정을 멈추고 상기 메인순환루프(10)내로 보충수를 공급하게 된다.The operation control unit 80 receives data on the amount of dissolved oxygen amplified by the picoamperometer 41 as an electrical signal, receives an electrical signal transmitted from the temperature sensor 42, and at a barometric pressure sensor 43. Receives data on atmospheric pressure as an electrical signal, calculates the oxygen consumption rate, displays the respiratory state of the organism, and when the oxygen saturation in the main circulation loop 10 is less than or equal to a predetermined value, the valve control unit 81 controls the three directions. The valve 50 and the supplemental water open / close valve 60 are operated to stop the measurement and supply the supplemental water into the main circulation loop 10.
상기 연산제어부(80)는 압력(대기압 Patm = 1기압 = 1013 mbar = 1013 hPa)하에서 수온과 염분에 따른 산소포화농도(ml/l)를 다음과 같은 수식을 이용하여 연산한다.The operation control unit 80 is the oxygen saturation concentration according to the water temperature and salinity under pressure (atmospheric pressure Patm = 1 atmosphere = 1013 mbar = 1013 hPa) (ml / l) is calculated using the following formula.
ln= A1 + A2(100/T) + A3ln(T/100) + A4(T/100) + S‰((B1 + B2 (T/100) + B3 (T/100)2))ln = A1 + A2 (100 / T) + A3ln (T / 100) + A4 (T / 100) + S ‰ ((B1 + B2 (T / 100) + B3 (T / 100) 2))
여기서, T는 측정시 온도, S는 염분이며, A와 B는 상수로서 다음과 같다.Where T is the temperature at the time of measurement, S is the salinity, and A and B are constants as follows.
A1 = -173.4292, A2 = 249.6339, A3 = 143.3483, A4 = -21.8492,A1 = -173.4292, A2 = 249.6339, A3 = 143.3483, A4 = -21.8492,
B1 = -0.033096, B2 = 0.0142959, B3 = -0.0017000.B1 = -0.033096, B2 = 0.0142959, B3 = -0.0017000.
측정상태()의 산소농도(mg/l)는 아래와 같이 표준상태()와의 관계로 추정하였다.Measurement status ) The oxygen concentration (mg / l) is in the standard state ( ) Is estimated.
=(1013 hPa/Patm) × (T/273.15K) = (1013 hPa / Patm) × (T / 273.15K)
여기서, T는 측정시 온도, Patm [hPa]은 측정시 대기압력을 나타낸다.Where T is the temperature at measurement and Patm [hPa] is the atmospheric pressure at the time of measurement.
(mg/l)와(ml/l) 관계는(mg/l) =(ml/l) × 1.429 로 산출하였다. (mg / l) and (ml / l) relationship (mg / l) = (ml / l) × 1.429.
도 2에 도시된 바와 같이, 산소소비율 측정은 상기 순환펌프(20) 의해서 화살표 방향으로 물이 순환되면서 산소센서(40)에 의해 감지된 순환수의 미세한 용존산소량의 전기적 변화를 피코암페어메타(pico amperemeter)(41)로 증폭하고, 이것을 연산제어부(80)의 컴퓨터가 기압센서(43)의 보정에 의해서 자동으로 측정하여 기록한다.As shown in FIG. 2, the oxygen consumption rate is measured by the circulating pump 20 while the water is circulated in the direction of the arrow, and the electrical change of the minute dissolved oxygen amount of the circulated water detected by the oxygen sensor 40 is picoamperometer (pico Amplified by an ampere meter (41), the computer of the arithmetic and control unit 80 automatically measures and records the correction by the barometric pressure sensor 43.
도 3에 도시된 바와 같이, 시스템 내부의 산소농도를 일정한 수준으로 유지하도록 조작하면 생물이 호흡함으로써 시스템 내부의 산소포화도가 일정 수준 이하로 내려갔을 때 보충수 개폐밸브(60)가 자동으로 작동하면서 점선 화살표 방향으로 물이 순환되고, 이때 보충수저장조(70)에 포화시켜둔 새로운 물이 상기 메인순환루프(10) 내로 유입되게 된다.As shown in FIG. 3, when the oxygen concentration inside the system is operated to maintain a constant level, when the oxygen saturation in the system falls below a certain level by breathing a living body, the refill water opening and closing valve 60 automatically operates. Water is circulated in the direction of the dotted arrow, and new water saturated in the supplemental water storage tank 70 is introduced into the main circulation loop 10.
여기서, 상기 생물저장조(30) 속에 들어 있는 피실험생물은 순환펌프(20)의 작동에 의해 항상 일정한 속도의 물이 유입되는 것을 느끼는 셈이며, 또한 새로운물이 보충수저장조(70)로부터 유입되는 동안에는 측정이 일시적으로 중단된다.Here, the test subject in the biological storage tank 30 feels that water at a constant speed is always introduced by the operation of the circulation pump 20, and new water is introduced from the supplemental water storage tank 70. The measurement is temporarily interrupted during this time.
상기 보충수저장조(70)로부터 새로 유입된 포화상태의 물이 기존의 생물저장조(30) 안에 남아 있던 물과 혼합된 후 연산제어부(80)의 컴퓨터에 의해 정해진 산소농도를 산소센서(40)가 감지하게 된다.After the newly introduced saturated water introduced from the supplemental water storage tank 70 is mixed with the water remaining in the existing biological storage tank 30, the oxygen sensor 40 determines the oxygen concentration determined by the computer of the operation control unit 80. Will be detected.
또한, 상기 3방향밸브(50)와 보충수 개폐밸브(60)를 닫아 메인순환루프(10)를 폐루프로 형성한 후 산소소비율 측정이 다시 시작되고, 산소소비율은 매초마다 산소센서에 의해서 감지되어지며, 측정간격은 90초로 하였다.In addition, after closing the three-way valve 50 and the supplemental water opening and closing valve 60 to form the main circulation loop 10 as a closed loop, the oxygen consumption rate is restarted, the oxygen consumption rate is detected by the oxygen sensor every second The measurement interval was set to 90 seconds.
즉, 90초 동안 90번 감지된 자료는 컴퓨터의 계산에 의해서 산술평균 되어 시간당 평균 산소소비율()로 모니터 상에는 한 개의 점으로서 표시되고, 측정중 현재의 실험시간(local time)과, 산소농도, 산소소비율, 온도, 대기압력 자료 등은 ASCII file로 컴퓨터에 자동으로 저장된다.That is, the data sensed 90 times in 90 seconds are arithmetic averaged by computer calculation and the average oxygen consumption rate per hour ( This is displayed as a dot on the monitor, and the current local time, oxygen concentration, oxygen consumption rate, temperature and atmospheric pressure data during the measurement are automatically stored in the computer as an ASCII file.
이상에서 설명한 바와 같이 본 발명에 따른 자동 호흡측정장치에 의하면, 실험에 사용중인 물의 산소포화도가 일정치 이하일 때 산소가 포화용존된 물을 자동으로 공급할 수 있고 대기압을 자동으로 보정하여 생물의 호흡상태를 장시간 측정할 수 있을 뿐만 아니라 실험오차도 줄일 수 있는 효과가 있다.As described above, according to the automatic respiration measuring apparatus according to the present invention, when the oxygen saturation degree of the water being used in the experiment is below a certain value, the oxygen-saturated dissolved water can be automatically supplied, and the atmospheric pressure is automatically corrected to the respiratory state of the organism. Not only can be measured for a long time, but also has the effect of reducing the experimental error.
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| KR102237856B1 (en) | 2020-11-27 | 2021-04-08 | 브레싱스 주식회사 | Rotating type breathing measuring device with sterilization and disinfection function |
| KR102237857B1 (en) | 2020-11-27 | 2021-04-08 | 브레싱스 주식회사 | Sliding type breathing measuring device with sterilization and disinfection function |
| KR20220073986A (en) | 2020-11-27 | 2022-06-03 | 브레싱스 주식회사 | Breathing measuring device with sterilization and disinfection function |
| KR20220074007A (en) | 2020-11-27 | 2022-06-03 | 브레싱스 주식회사 | Breathing measuring device with sterilization and disinfection function |
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| KR20030076803A (en) * | 2002-03-21 | 2003-09-29 | 한국해양연구원 | Micro oxygen detector |
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| KR102237856B1 (en) | 2020-11-27 | 2021-04-08 | 브레싱스 주식회사 | Rotating type breathing measuring device with sterilization and disinfection function |
| KR102237857B1 (en) | 2020-11-27 | 2021-04-08 | 브레싱스 주식회사 | Sliding type breathing measuring device with sterilization and disinfection function |
| KR20220073986A (en) | 2020-11-27 | 2022-06-03 | 브레싱스 주식회사 | Breathing measuring device with sterilization and disinfection function |
| KR20220074007A (en) | 2020-11-27 | 2022-06-03 | 브레싱스 주식회사 | Breathing measuring device with sterilization and disinfection function |
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