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Dissolved oxygen do meter

Dissolved oxygen do meter, Total:185 items.

In the international standard classification, Dissolved oxygen do meter involves: Water quality, Inorganic chemicals, Analytical chemistry, Geology. Meteorology. Hydrology, Linear and angular measurements, Metrology and measurement in general, Photography, Cereals, pulses and derived products, Power stations in general, Vocabularies, Nuclear energy engineering, Installations in buildings, Pharmaceutics, Wood, sawlogs and sawn timber, Burners. Boilers, Products of the chemical industry, Pulps, Organic chemicals, Fishing and fish breeding, Wastes, Materials and articles in contact with foodstuffs.


Professional Standard - Environmental Protection, Dissolved oxygen do meter

  • HJ/T 99-2003 The technical requirement for water quality automatic analyzer of dissolved oxygen(DO)
  • HJ 925-2017 Technical requirements and testing methods of portable dissolved oxygen meter
  • HJ 506-2009 Water quality.Determination of dissolved oxygen.Electrochemical probe method
  • HJ/T 46-1999 Technical conditions of detector of sulphur dioxide concentration for constant potential electrolysis method

ANSI - American National Standards Institute, Dissolved oxygen do meter

  • IT4.40-1996 Photography (Processing) - Effluents - Determination of Biochemical Oxygen Demand (BOD) and Dissolved Oxygen (DO)

National Metrological Verification Regulations of the People's Republic of China, Dissolved oxygen do meter

  • JJG 291-2018 Dissolved Oxygen Meters
  • JJG 1060-2010 Verification Regulation of Low-level Dissolved Oxygen Meters
  • JJG 291-1999 Verification Regulation of Film Electrode Dissolved Oxygen Meter
  • JJG 291-2008 Verification Regulation of Dissolved Oxygen Meter with Covered-Membrane-Electrode

Professional Standard - Aquaculture, Dissolved oxygen do meter

Japanese Industrial Standards Committee (JISC), Dissolved oxygen do meter

工业和信息化部, Dissolved oxygen do meter

Professional Standard - Ocean, Dissolved oxygen do meter

American National Standards Institute (ANSI), Dissolved oxygen do meter

  • ANSI IT4.40-1996 Photography (Processing) - Effluents - Determination of Biochemical Oxygen Demand (BOD) and Dissolved Oxygen (DO) Revision and Redesignation of ANSI PH4.40-1984
  • ANSI/NAPM IT4.40-1996 Photography (Processing) - Effluents - Determination of Biochemical Oxygen Demand (BOD) and Dissolved Oxygen (DO) (revision and redesignation of ANSI PH4.40-1984 (R1992))
  • ANSI/TAPPI T212 om-2012 One percent sodium hydroxide solubility of wood and pulp

National Metrological Technical Specifications of the People's Republic of China, Dissolved oxygen do meter

  • JJF 1714-2018 Program of Pattern Evaluation of Low-level Dissolved Oxygen Meters
  • JJF 1441-2013 Program of Pattern Evaluation of Dissolved Oxygen Meter With Covered-Membrane-Electrode

Group Standards of the People's Republic of China, Dissolved oxygen do meter

  • T/CMA HG109-2023 Calibration Method for On-line Dissolved Oxygen Analyzer
  • T/QAS 066-2021 Determination of Dissolved Oxygen in Brine by Iodometric Method
  • T/CQEEMA 2-2021 Determination of Dissolved oxygen in water by Chemical fluorescence method
  • T/QGCML 1215-2023 Technical specifications for the production of functional (high dissolved oxygen) packaged drinking water

Indonesia Standards, Dissolved oxygen do meter

PL-PKN, Dissolved oxygen do meter

  • PN C04545 ArkusZ08-1972 Wo?er and was?e wa?er Test* for dissolved oxygen Determination o? dissolyed oxygen with membranie oxygenic gauge
  • PN C04545 ArkusZ02-1972 Water and waste water Tes?s for dissolved oxygen Determination ot dissolved oxygen by Winkler me?hod
  • PN C80254 REAGENTS MELTED CALCIUM CHLORIDE
  • PN C04545 ArkusZ03-1972 Wo?er and was?e water Tes?s for dissolved oxygen Determination of dissoked oxygen by Winkler method, azide modifikation
  • PN C04545 ArkusZ04-1972 Wa?er and waste wa?er Tests for dis$olved oxygenDetermination of dissolved oxygen by Winkler me?hod, perman ganate modifikalion
  • PN C04545 ArkusZ05-1972 Water and was?e wa?er Tes?s for dissoived oxygen De?ermina?ion o? dissolyed oxygen by Winkler me?hod, hypochlorite modifikation
  • PN C04545 ArkusZ06-1972 Water and was?e wa?er Tes?s for dissolved oxygen Determination of dissolved oxygen by Winkler me?hod-di?ference modification Rang?: 0,02*0,5 mg/l
  • PN C04545 ArkusZ07-1972 Water and waste water Testt for dissolved oxygen Determination of dissolyed oxygen by Winkler method-difterence modification Rang?: 0,5 mg/l or mor?
  • PN-EN ISO 18256-1-2021-07 E Nuclear fuel technology -- Dissolution of plutonium dioxide-containing materials -- Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • PN C04545 ArkusZ01-1972 Wa?er and waste wa?er Tests for dissolved oxygen Introduc?ion and rang? of standard
  • PN-EN ISO 18256-2-2021-07 E Nuclear fuel technology -- Dissolution of plutonium dioxide-containing materials -- Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

ZA-SANS, Dissolved oxygen do meter

Professional Standard - Nuclear Industry, Dissolved oxygen do meter

Professional Standard - Electricity, Dissolved oxygen do meter

HU-MSZT, Dissolved oxygen do meter

British Standards Institution (BSI), Dissolved oxygen do meter

  • BS EN ISO 18256-1:2021 Nuclear fuel technology. Dissolution of plutonium dioxide-containing materials - Dissolution of plutonium dioxide powders
  • BS EN IEC 60746-4:2019 Expression of performance of electrochemical analyzers - Dissolved oxygen in water measured by membrane-covered amperometric sensors
  • BS EN 25813:1984 Water quality - Determination of dissolved oxygen - Iodometric method
  • BS EN ISO 18256-2:2021 Nuclear fuel technology. Dissolution of plutonium dioxide-containing materials - Dissolution of MOX pellets and powders
  • BS ISO 17289:2014 Water quality. Determination of dissolved oxygen. Optical sensor method
  • BS EN ISO 5814:2012 Water quality. Determination of dissolved oxygen. Electrochemical probe method
  • BS EN 25814:1992 Method for determination of dissolved oxygen in water: electrochemical probe method

Professional Standard - Urban Construction, Dissolved oxygen do meter

American Society for Testing and Materials (ASTM), Dissolved oxygen do meter

  • ASTM UOP364-85 Trace Dissolved Oxygen in Liquids
  • ASTM D888-03 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-05 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-92(1996) Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-18 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-09 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-12 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM D888-12e1 Standard Test Methods for Dissolved Oxygen in Water
  • ASTM E2503-07 Standard Practice for Qualification of Basket and Paddle Dissolution Apparatus
  • ASTM E2503-13(2020) Standard Practice for Qualification of Basket and Paddle Dissolution Apparatus
  • ASTM E2503-13e1 Standard Practice for Qualification of Basket and Paddle Dissolution Apparatus
  • ASTM D5543-94(1999)e1 Standard Test Methods for Low-Level Dissolved Oxygen in Water
  • ASTM D5543-21 Standard Test Method for Low-Level Dissolved Oxygen in Water
  • ASTM D5543-15 Standard Test Method for Low-Level Dissolved Oxygen in Water
  • ASTM D5543-94(2005) Standard Test Methods for Low-Level Dissolved Oxygen in Water
  • ASTM D5543-09 Standard Test Methods for Low-Level Dissolved Oxygen in Water
  • ASTM UOP678-04 Dissolved Molecular Oxygen in Liquid Hydrocarbons by Electrochemical Detection
  • ASTM D513-16 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
  • ASTM D513-92(1996) Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
  • ASTM D513-02 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
  • ASTM UOP678-88 Dissolved Molecular Oxygen in Liquid Hydrocarbons by Electrochemical Detection
  • ASTM D513-11e1 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
  • ASTM D5511-94 Standard Test Method for Determining Anaerobic Biodegradation of Plastic Materials Under High-Solids Anaerobic-Digestion Conditions
  • ASTM D5511-11 Standard Test Method for Determining Anaerobic Biodegradation of Plastic Materials Under High-Solids Anaerobic-Digestion Conditions
  • ASTM D5511-12 Standard Test Method for Determining Anaerobic Biodegradation of Plastic Materials Under High-Solids Anaerobic-Digestion Conditions
  • ASTM D1109-21 Standard Test Method for 1 % Sodium Hydroxide Solubility of Wood

AT-ON, Dissolved oxygen do meter

  • ONORM M 6267-1984 Water quality; determination ofdissolved oxygen; iodometric method
  • OENORM EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • ONORM EN 25813-1993 Water quality — Determination of dissolved oxygen -lodometric method (ISO 5813:1983)
  • ONORM M 6266-1984 Water quality; determination of dissolved oxygen; electro- chemical probe method
  • ONORM EN 25814-1993 Water quality - Determination of dissolved oxygen -Electrochemical probe method (ISO 5814:1990)
  • OENORM EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

Professional Standard - Coal, Dissolved oxygen do meter

  • MT/T 370-2007 Determination of dissolved oxygen in coal mine water
  • MT/T 370-1994 Determination method of dissolved oxygen in coal mine water

Korean Agency for Technology and Standards (KATS), Dissolved oxygen do meter

  • KS I ISO 5813-2014(2019) Water quality — Determination of dissolved oxygen — Iodometric method
  • KS I ISO 5813:2007 Water quality-Determination of dissolved oxygen-Iodometric method
  • KS I ISO 5813:2014 Water quality — Determination of dissolved oxygen — Iodometric method
  • KS I ISO 5814:2007 Water quality-Determination of dissolved oxygen-Electrochemical probe method
  • KS I ISO 5814:2017 Water quality-Determination of dissolved oxygen-Electrochemical probe method
  • KS M 7058-2002(2007) Testing method for 1% sodium hydroxide solubility in raw materials of pulp
  • KS M 7058-1982 Testing method for 1% sodium hydroxide solubility in raw materials of pulp

RO-ASRO, Dissolved oxygen do meter

  • STAS 7947 Pt.6-1967
  • STAS 6536-1987 DRINKING WATER Determination of dissolved oxygen content in water
  • STAS 7688-1984 WATER AND STEAMS FROM BOILER PLANTS Disoived oxygen determination
  • SR CEI 746-4-1996 Expression of performance of electrochemical analyzers Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors

European Committee for Standardization (CEN), Dissolved oxygen do meter

  • EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)
  • EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • EN 25813:1992 Water Quality - Determination of Dissolved Oxygen - Iodometric Method
  • EN 25814:1992 Water Quality - Determination of Dissolved Oxygen - Electrochemical Probe Method

International Organization for Standardization (ISO), Dissolved oxygen do meter

  • ISO 18256-2:2019 Nuclear fuel technology — Dissolution of plutonium dioxide-containing materials — Part 2: Dissolution of MOX pellets and powders
  • ISO 18256-1:2019 Nuclear fuel technology — Dissolution of plutonium dioxide-containing materials — Part 1: Dissolution of plutonium dioxide powders
  • ISO 5813:1983 Water quality; Determination of dissolved oxygen; Iodometric method
  • ISO 5814:1984 Water quality — Determination of dissolved oxygen — Electrochemical probe method
  • ISO 17289:2014 Water quality - Determination of dissolved oxygen - Optical sensor method
  • ISO 5814:2012 Water quality - Determination of dissolved oxygen - Electrochemical probe method
  • ISO 5814:1990 Water quality; determination of dissolved oxygen; electrochemical probe method

Association Francaise de Normalisation, Dissolved oxygen do meter

  • NF M60-478-1*NF EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials -Part 1 : dissolution of plutonium dioxide powders
  • NF T90-141*NF EN 25813:1993 Water quality - Determination of dissolved oxygen - Iodometric method.
  • NF EN 25813:1993 Qualité de l'eau - Dosage de l'oxygène dissous - Méthode iodométrique
  • NF T90-011:2001 Water quality - Determination of dissolved carbon dioxide.
  • NF EN ISO 18256-1:2021 Technologie du combustible nucléaire - Dissolution des matériaux contenant du dioxyde de plutonium - Partie 1 : dissolution des poudres de dioxyde de plutonium
  • NF T90-106*NF EN ISO 5814:2012 Water quality - Determination of dissolved oxygen - Electrotechnical probe method
  • NF ISO 17289:2014 Qualité de l'eau - Dosage de l'oxygène dissous - Méthode optique à la sonde
  • NF T90-289*NF ISO 17289:2014 Water quality - Determination of dissolved oxygen - Optical sensor method
  • NF T90-106:1993 Water quality - Determination of dissolved oxygen - Electrochemical probe method.
  • NF EN ISO 5814:2012 Qualité de l'eau - Dosage de l'oxygène dissous - Méthode électrochimique à la sonde
  • NF EN ISO 18256-2:2021 Technologie du combustible nucléaire - Dissolution des matériaux contenant du dioxyde de plutonium - Partie 2 : dissolution de pastilles et poudres de MOX (ou mélanges d'oxydes)
  • NF M60-478-2*NF EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials -Part 2 : dissolution of MOX pellets and powders
  • NF C46-270-4*NF EN IEC 60746-4:2019 Expression of performance of electrochemical analyzers - Part 4 : dissolved oxygen in water measured by membrane covered amperometric sensors

IT-UNI, Dissolved oxygen do meter

  • UNI EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders
  • UNI EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders

German Institute for Standardization, Dissolved oxygen do meter

  • DIN EN ISO 18256-1:2021-04 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019); English version EN ISO 18256-1:2021
  • DIN EN 25813:1993 Water quality; determination of dissolved oxygen; iodometric method (ISO 5813:1983); german version EN 25813:1992
  • DIN EN 25813:1993-01 Water quality; determination of dissolved oxygen; iodometric method (ISO 5813:1983); german version EN 25813:1992
  • DIN ISO 17289:2014-12 Water quality - Determination of dissolved oxygen - Optical sensor method (ISO 17289:2014)
  • DIN EN ISO 5814:2013-02 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012); German version EN ISO 5814:2012
  • DIN EN ISO 18256-2:2021-04 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019); English version EN ISO 18256-2:2021
  • DIN ISO 17289:2014 Water quality - Determination of dissolved oxygen - Optical sensor method (ISO 17289:2014)
  • DIN EN IEC 60746-4:2019-10 Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors (IEC 60746-4:2018); German version EN IEC 60746-4:2019 / Note: DIN IEC 60746-4 (1996-07) remains valid alongsid...
  • DIN EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019); English version EN ISO 18256-1:2021

ES-UNE, Dissolved oxygen do meter

  • UNE-EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019) (Endorsed by Asociación Española de Normalización in March of 2021.)
  • UNE-EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019) (Endorsed by Asociación Española de Normalización in March of 2021.)
  • UNE-EN IEC 60746-4:2019 Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors (Endorsed by Asociación Española de Normalización in April of 2019.)

VN-TCVN, Dissolved oxygen do meter

  • TCVN 7324-2004 Water quality.Determination of dissolved oxygen.Lodometric method
  • TCVN 7325-2004 Water quality.Determination of dissolved oxygen.Electrochemical probe method
  • TCVN 7325-2016 Water quality - Determination of dissolved oxygen - Electrochemical probe method
  • TCVN 6624-1-2000 Water quality.Determination of nitrogen.Part 1: Method using oxidative digestion with peroxodisunfate

中华人民共和国环境保护部, Dissolved oxygen do meter

  • GB 7489-1987 Water guality-Determination of dissolved oxyqen-Iodometric method

Danish Standards Foundation, Dissolved oxygen do meter

  • DS/EN 25813:2003 Water quality - Determination of dissolved oxygen - Iodometric method
  • DS/EN ISO 18256-1:2021 Nuclear fuel technology – Dissolution of plutonium dioxide-containing materials – Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • DS/EN 25813:1993 Water quality. Determination of dissolved oxygen. Iodometric method
  • DS/EN 25814:1993 Water quality. Determination of dissolved oxygen. Electrochemical probe method
  • DS/EN ISO 5814:2013 Water quality - Determination of dissolved oxygen - Electrochemical probe method
  • DS/EN ISO 18256-2:2021 Nuclear fuel technology – Dissolution of plutonium dioxide-containing materials – Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Dissolved oxygen do meter

  • GB/T 7489-1987 Water quality--Determination of dissolved oxygen--Iodometric method
  • GB/T 11913-1989 Water quality--Determination of dissolved oxygen--Electrochemical probe method
  • GB 11913-1989 Determination of dissolved oxygen in water by electrochemical probe method
  • GB/T 12157-1989 Analysis of water used in boiler and cooling system--Determination for dissolved oxygen--Internal electrolysis
  • GB/T 15455-1995 Industrial circulating cooling water Determination of dissolved oxygen

RU-GOST R, Dissolved oxygen do meter

  • GOST R 8.754-2011 State system for ensuring the uniformity of measurements. Analyzers of oxygen dissolved in water. Verification procedure
  • GOST R 50332.1-1992 Alumina. Methods for the decomposition of test sample and the preparation of test solution

SE-SIS, Dissolved oxygen do meter

ES-AENOR, Dissolved oxygen do meter

CH-SNV, Dissolved oxygen do meter

  • SN EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • SN EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

Lithuanian Standards Office , Dissolved oxygen do meter

  • LST EN ISO 18256-1:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 1: Dissolution of plutonium dioxide powders (ISO 18256-1:2019)
  • LST EN 25813-1999 Water quality - Determination of dissolved oxygen - Iodometric method (ISO 5813:1983)
  • LST EN ISO 5814:2012 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012)
  • LST EN ISO 18256-2:2021 Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

CZ-CSN, Dissolved oxygen do meter

Professional Standard - Aviation, Dissolved oxygen do meter

  • HB 5328-1993 Test method for solubility of anaerobic adhesives used in aviation

NL-NEN, Dissolved oxygen do meter

  • NEN-ISO 5813:1993 Water quality. Determination of dissolved oxygen. Iodometric method (ISO 5813:1983)
  • NEN-ISO 5814:1993 Water quality. Determination of dissolved oxygen. Electrochemical probe method (ISO 5814:1990)

Taiwan Provincial Standard of the People's Republic of China, Dissolved oxygen do meter

  • CNS 4715-2005 Method of test for 1% sodium hydroxide solubles in wood

AENOR, Dissolved oxygen do meter

  • UNE-EN 25813:1994 WATER QUALITY. DETERMINATION OF DISSOLVED OXYGEN. IODOMETRIC METHOD. (ISO 5813:1983).
  • UNE-EN ISO 5814:2013 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012)

KR-KS, Dissolved oxygen do meter

  • KS I ISO 5814-2017 Water quality-Determination of dissolved oxygen-Electrochemical probe method
  • KS I ISO 5814-2023 Water quality — Determination of dissolved oxygen — Electrochemical probe method

CENELEC - European Committee for Electrotechnical Standardization, Dissolved oxygen do meter

  • EN IEC 60746-4:2019 Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors

未注明发布机构, Dissolved oxygen do meter

  • DIN IEC 746-4:1996 Expression of Performance of electrochemical analyzers — Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors
  • BS 2690-101:1984(2000) Methods oftesting Water used in industry — Part 101 : Dissolved oxygen

United States Navy, Dissolved oxygen do meter

Universal Oil Products Company (UOP), Dissolved oxygen do meter

  • UOP 678-2004 DISSOLVED MOLECULAR OXYGEN IN LIQUID HYDROCARBONS BY ELECTROCHEMICAL DETECTION

YU-JUS, Dissolved oxygen do meter

  • JUS H.Z1.135-1985 Testing of industrial vvaters. Determination ofdissolved oxygen. Volumetric method

International Electrotechnical Commission (IEC), Dissolved oxygen do meter

  • IEC 60746-4:2018 Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors

BE-NBN, Dissolved oxygen do meter

IN-BIS, Dissolved oxygen do meter

Tianjin Provincial Standard of the People's Republic of China, Dissolved oxygen do meter

  • DB12/T 784-2018 Technical specifications for aquaculture dissolved oxygen wireless measurement and control system




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