Oil in water meter

Oil in water meter, Total:219 items.

The international standard classification for "Oil in water meter" includes: Chemical analysis , Geology. Meteorology. Hydrology , food products in general , Measurement of fluid flow , Analytical chemistry in general , Lubricants, industrial oils and related products , Equipment for petroleum and natural gas industries in general , Extraction and processing of petroleum and natural gas , Mining and quarrying , Exploratory and extraction equipment , Rubber , Cement. Gypsum. Lime. Mortar , Optical measuring instruments , Fruits and derived products , Temperature-measuring instruments .

The Chinese standard classification for "Oil in water meter" includes: Chemical Measurement , Ionizating Radiation Measurement , Basic standards and general methods for water treatment agent , Hydrology and water conservancy instrument , Food sanitation , Flow capacity and material level instrument , Electrochemical, thermochemistry and optical profile type analyzer , Insulating oil , Petroleum drilling & production equipment and instrument , Petroleum extraction , Petroleum products in general , Coal gas , Rubber products in general , Cement , Oceanographic instrumentation , Telescope, geodetic survey and aerial survey instrumentation , Industrial automation and control device in general .

National Metrological Verification Regulations of the People's Republic of China

JJG 852-1993 Neutron Ambient Dose Equivalent Meter
JJG 950-2012 Analyzers for Oil Content in Water
JJG 986-2004 Verification Regulation of Wood Moisture Content Measuring Meters
JJG(交通) 104-2015 Apparatus for Pavement Permeability Coefficient
JJG 950-2000 Verification Regulation of Oil Content in Water Analyzer
JJG 170-2020 Waterborne engineering attitude measuring instrument【
JJG(石油) 45-1997 Verification Regulation of Core Oil-water Saturation Meter
JJG(民航) 022-1995 Verification Regulation of Test Set,Fuel Quantity-Gage,Capaoitance Type GTF-2
JJG(民航) 0086-2006 PSD60-2R Fuel Quantity Test Set

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 27992.3-2016 Instruments for water-depth measurement—Part 3: Echo sounder
GB/T 7600-1987 Determination of water content in transformer oils in service by coulometric method
GB/T 12152-2007 Water for boiler and cooling system—Determination of mineral oil
GB/T 11828.5-2011 Instruments for stage measurement—Part 5:Electronic gauge
GB/T 11828.6-2008 Instruments for stage measurement—Part 6:Remote measuring stage gauge
GB/T 26793-2011 Coulometry micro water teller
GB/T 5009.143-2003 Determination of amitraz residues in vegetables,fruits,edible oil
GB/T 27992.1-2011 Water depth finding equipment - Part 1: Hydrologic sounding rod
GB/T 21978.5-2014 Instrument for precipitation observation―Part 5: Display and record for rainfall
GB/T 11828.3-2012 Instruments for stage measurement—Part 3:Groundwater stage gauge
GB/T 7600-2014 Determination of water content in transformer oils and turbine oils in service by coulometric method

Group Standards of the People's Republic of China

T/CEC 426.1-2020 General technical requirements for electric oil testing instruments Part 1: Trace moisture analyzer
T/CIMA 0040-2021 Rapid determination of total phosphorus in water
T/WHAEPI 004-2021 Infrared oil gauge
T/CSGPC 003-2022 Surveying Regulation of Opposite Observation Compound Level
T/SDAS 814-2024 General technical requirements for rapid monitoring instruments for petroleum in seawater using fluorescence method

Professional Standard - Petroleum

SY/T 6071-1994 Radio Frequency Analysers for Water-cut of Crude Oil
SY/T 0530-1993 Spectrophotometric method for the determination of oil content in oilfield sewage
SY/T 0601-1997 Determination of emulsified oil and oil-soluble in water
SY/T 6452-2000 Core oil/water relative permeameter
SY 0530-2011 Spectrophotometric method for determination of oil content in oilfield produced water
SY/T 6582.4-2003 The calibration for petroleum nuclear logging tool Part 4: The calibration for compensated neutron tool
SY/T 6369-1998 Core oil-water saturation measuring apparatus
SY/T 0601-2016 Determination of emulsified oil and soluble oil in produced water
SY/T 0601-2009 Determination of emulsified oil and soluble oil in water
SY 6452-2000 Rock oil-water relative permeability tester
SY/T 0530-2011 Determination of Oil Content in Oilfield Produced Water. Spectrophotometry Method
SY/T 6973-2013 Petroleum Core Induced Polarization Potential Measurement Instrument
SY 6973-2013 Petroleum Rock Induced Polarization Potential Measuring Instrument
SY/T 5429-2000 Small diameter flowrate and watercut logging tool

Professional Standard - Petrochemical Industry

SH/T 0246-1992 Determination method for water content in light petroleum products (coulometric method )
SH/T 0078-1991 Determination of trace moisture in liquefied petroleum gas (electrolytic method)
SH/T 1718-2015 Oil-extended synthetic rubber. Determination of oil content
SH/T 1718-2002 Oil - extended synthetic rubber - Determination of oil content

National Metrological Technical Specifications of the People's Republic of China

JJF 1792-2020 Calibration Specification for Seawater pH Analyzers
JJF 1348-2012 Program of Pattern Evaluation of Analyzers for Oil Content in Water
JJF 1571-2016 Calibration Specification for Seawater Turbidity Analyzers
JJF 2105-2024 Calibration Specification for Seawater Temperature and Salinity Measuring Instruments
JJF(建材) 148-2018 Specification for calibration of distiller for determination of chloride ion content in cement
JJF(建材)148-2018 Calibration Specification for Distillation Instruments for Determination of Chloride Content in Cement
JJF(机械) 029-2008 Calibration specification for gravimetric fuel consumption measuring instrument

工业和信息化部/国家能源局

JB/T 13046-2017 Parameters measuring instrument for oil pipe screw thread

中国气象局

QX/T 320-2016 Weighing precipitation meter

Professional Standard - Building Materials

JC/T 2000-2009 Apparatus for determining physical performance of oil well cenment

Professional Standard - Chemical Industry

HG/T 3527-2008 Industrial circulating cooling water - Determination of mineral oil
HG 5-1596-1985 Determination method of oil content in industrial circulating cooling water
HG/T 3527-1985 Determination method of oil content in industrial circulating cooling water

国家质量监督检验检疫总局

SN/T 4435-2016 Determination of water content in crude petroleum - Hydrid reaction method

工业和信息化部

JC/T 2000-2019 Apparatus for determining physical performance of oil well cenment

Professional Standard - Ocean

HY/T 099-2007 Test method of seawater nutrients analyzer
HY/T 100-2007 Test method of seawater turbidity analyzer
HY/T 096-2007 Test method of seawater dissolved oxygen analyzer
HY/T 267-2018 Testing method of seawater conductivity measuring instrument
HY/T 098-2007 Test method of seawater pH analyzer

Professional Standard - Nuclear Industry

EJ/T 738-1992 Neutron moisture meter
EJ/T 1011-1996 Fixed neutron dose equivalent rate meter, alarm device and monitor

Shandong Provincial Standard of the People's Republic of China

DB37/T 1845-2011 Technical conditions of online infrared oil measuring instrument for water quality
DB37/T 3626-2019 Determination of Petroleum Hydrocarbons in Aquatic Products

Professional Standard - Hydroelectric Power

SD 313-1989 Method for measuring particle number and size distribution in oil (automatic particle counter method)

Professional Standard - Machinery

JB/T 9315-1999 Geodetic instuments-Levelling staffs

Professional Standard - Electricity

DL/T 2029-2019 Determination of total moisture in coal by automatic instrumental method

Professional Standard - Agriculture

NY/T 2013-2011 Determination of essential oil in citrus fruits and derived products

能源部

SY/T 5429-1991 Small diameter flow water content tester

Jilin Provincial Standard of the People's Republic of China

DB22/T 2001-2014 Bromate Rapid Detector in Drinking Water

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

GB/T 33907-2017 Electrolytic solid moisture meter

Taiwan Provincial Standard of the People's Republic of China

CNS 8999-1982 Methods of Test for Copper in Industrial Waste Water - Polarographic Method

Professional Standard - Commodity Inspection

SN/T 2382-2009 Determination of water in liquid petroleum gas—Karl Fischer method

RU-GOST R

GOST 1594-1969 Apparatus for quantitative determination of water content in petroleum, food and other products. Specifications
GOST R 50193.1-1992 Measurement of water flow in closed conduits. Meters for cold potable water. Specifications
GOST R 50193.2-1992 Measurement of water flow in closed conduits. Meters for cold potable water. Installation requirements
GOST R 50193.3-1992 Measurement of water flow in closed conduits. Meters for cold potable water. Test methods and equipment
GOST 8.530-1985 State system for ensuring the uniformity of measurements. Blast-furnace coke humidity. Techniques of measurements by neutron moisture meters
GOST 8.614-2013 State system for ensuring the uniformity of measurements. State verification schedule for instruments measuring the volumetric water cut of oil and oil products
GOST R 8.666-2009 State system for ensuring the uniformity of measurements. Moisture meters neutron. The method of verification
GOST 14618.6-1978 Essential oils, aromatics and their intermediates. Determination of water content
GOST R 54284-2010 Crude oil. Determination of water by coulometric Karl Fischer titation

PT-IPQ

NP 3275-1986 Edible fats and oils. Measuring water content by moisture meter method

AT-ON

ONORM DIN 10317-1993 Determination of water content of butter

SE-SIS

SIS SS 02 81 44-1979 Determi'nation of oil and grease in water — Gravimetric method
SIS SS 02 81 45-1991 Determination ofoilin water — Infrared spectrophotometric method
SIS SS IEC 568:1981 Nuclear instrumentation - In-core instrumentation for neutron fluence r?te (flux) measurements in power reactors

RO-ASRO

STAS SR ISO 7858-1:1996 Measurement of water flow in closed conduite Meters for cold potable water - Combination meters Part 1: Specifications
SR ISO 4064-2:1996 Measurement of water flow in closed conduits - Meters for cold potable water - Part 2: Installation requirements
STAS 11071/21-1990 Hierarchy of measuring instruments. Block diagram of hierarchy of measuring instrument for thermal neutrons flux density

Danish Standards Foundation

DS/R 208:1980 Determination of oil and gresse in water. Gravimetric

German Institute for Standardization

DIN 877:1986 Inclination measuring instruments (levels)
DIN 877:1986-06 Inclination measuring instruments (levels)
DIN 25456-1:1999 Neutron fluence measurement - Part 1: Fast-neutron fluence determination with activation and fission detectors
DIN EN 61005:2005 Radiation protection instrumentation - Neutron ambient dose equivalent (rate) meters (IEC 61005:2003, modified); German version EN 61005:2004
DIN 18722:1983 Tubular level for surveying instruments; terms and requirements
DIN EN 17277:2020-02 Hydrometry - Measurement requirements and classification of rainfall intensity measuring instruments; German version EN 17277:2019

PL-PKN

PN C04288-12-1987 Technical fats Methods of testing Determination of water content
PN N99321-1960 Instrument of geodesy. Levels for surveyor's poles
PN M53421-1961 Measuring Instruments Bench Testing Centres
PN C04087-1989 Crude petroleum and petroleum products Determination contens of water and sediment by the centrifuge method
PN R66163-1962 Determination of the water contents in the oil-seeds, cakes and schats
PN G04542-1987 Hard coal Continous measurment of moisture by microwave meter
PN C04105-1990 Crude petroleum Determination of paraffin content
PN G02317-1991 Measuring meters for hydrogeology. Mechanical water level meters with boosters. Types, principal parameters and technical requirements
PN G02316-1991 Measuring meters for hydrogeology. Electrical water level meters with recorders. Types, principal parameters and technical requirements

HU-MSZT

MNOSZ 15596-1953 water level measuring instrument
MNOSZ 22306-1955 water level measuring instrument
MSZ 8588-1980 mercury blood pressure measuring instrument
MNOSZ 13958-1954 Laboratory calorimetry. Freezing point measuring instrument for mineral oil products
MSZ KGST 1733-1979 Determination of water content of butter

Association Francaise de Normalisation

NF E11-302:1984 Measuring instruments. Electronic levels.
NF C27-229:1985 Determination of water in insulating oils, and in oil-impregnated paper and pressboard.
NF E11-301:1984 Measuring instruments. Precision spirit levels.
NF M07-104:2000 Water-in-diesel emulsions - Determination of water content - Karl Fischer method
NF X10-301:1970 MEASUREMENT OF WATER FLOW IN OPEN CHANNELS BY VELOCITY AREA METHODSUSING PROPELLER CURRENT METERS.
NF ISO 3734:2000 Petroleum products - Determination of water and sediment content in residual fuel oils - Centrifugation method

Korean Agency for Technology and Standards (KATS)

KS V 0924-2013 Oil-water interface detectors for marine use
KS B ISO 7858-3-2015 Measurement of water flow in closed conduits — Meters for cold potable water — Combination meters — Part 3: Test methods
KS B ISO 7858-1-2015 Measurement of water flow in closed conduits — Combination meters for cold potable water — Part 1: Specifications
KS B ISO 4366:2004 Echo sounders for water depth measurements
KS B ISO 4366:2015 Echo sounders for water depth measurements
KS B ISO 4366:2014 Echo sounders for water depth measurements
KS M ISO 11223-1:2003 Petroleum and liquid products-Direct static measurements-Contents of vertical storage tanks-Part 1:Mass measurement by hydrostatic tank gauging
KS B ISO TR 11974:2005 Measurement of liquid flow in open channels－Electromagnetic current meters
KS B ISO 4064-2-2022 Measurement of water flow in closed conduits－Meters for cold potable water－Part 2：Installation requirements and selection
KS B ISO 4366:2020 Hydrometry — Echo sounders for water depth measurements
KS M ISO 3734:2011 Petroleum products－Determination of water and sediment in residual fuel oils－Centrifuge method
KS B ISO 12857-1:2002 Optics and optical instruments－Geodetic instruments－Field procedures for determining accuracy－Part 1：Levels
KS M 5431-1984 Test methods for moisture in paints

SCC

BS ISO 7858-1:1998 Measurement of water flow in closed conduits. Combination meters for cold potable water-Specifications
DANSK DS/ISO/TS 21397:2021 FTIR analysis of fire effluents in cone calorimeter tests
BS ISO 4064-2:2001 Measurement of water flow in closed conduits. Meters for cold potable water-Installation requirements and selection
05/30077097 DC ISO 4366. Hydrometry. Echo sounders for water depth measurements
BS 5728-4:1986 Measurement of flow of cold potable water in closed conduits-Specification for combination meters
ISO 4046-2:1978 Measurement of Water Flow in Closed Conduits - Meters for Cold Potable Water - Part 2: Installation Requirements
MIL MIL-L-52918-1977 LEVELS, SURVEYING, SELF LEVELING & TILTING (S/S BY A-A-52036)
AWPA A57-17(R2023) Standard Method for the Determination of Water in Oil-Type Preservatives
AWPA A57-11 Standard Method for the Determination of Water in Oil-Type Preservatives
BS 3680-8F:1986 Measurement of liquid flow in open channels. Measuring instruments and equipment-Hydrometric data transmission systems: general
BS 4385:1969 Method for determination of water content of petroleum products (Dean and Stark method)
BS 3680-8G:1992 Measurement of liquid flow in open channels. Measuring instruments and equipment-Specification for system requirements for hydrometric telemetry systems
AENOR UNE 7109:1957 DETERMINATION OF WATER IN CREOSOTE IMPREGNANT OILS
AENOR UNE 77080:2002 Water quality. Technical specifications for instruments for continuous measurement of dissolved oxygen in industrial discharges.
VDI 3870 BLATT 10-1994 Measuring rain components — Measuring the pH value in rainwater

British Standards Institution (BSI)

PD ISO/TS 21397:2021 FTIR analysis of fire effluents in cone calorimeter tests
BS ISO 7858-1:1998(1999) Measurement of water flow in closed conduits — Combination meters for cold potable water — Part 1 : Specifications
20/30376400 DC BS ISO 23350. Hydrometry. catching-type liquid precipitation measuring gauges
BS 3680-8H:1996 Measurement of liquid flow in open channels. Measuring instruments and equipment. Method of specifying the performance of hydrometric equipment
BS ISO 7858-2:2000 Measurement of water flow in closed conduits - Combination meters for cold potable water - Part 2: Installation requirements
BS ISO 23350:2021 Hydrometry. Catching-type liquid precipitation measuring gauges

CZ-CSN

CSN 83 0521 Cast.5-1976 Determination of tars in phenol waste waters
CSN 83 0571-1963 Determination of tars in phenol waste waters

API - American Petroleum Institute

API MPMS TR 2570-2010 Continuous On-line Measurement of Water Content in Petroleum (Crude Oil and Condensate) (First Edition)
API H00005-2000 Manual of Petroleum Measurement Standards - Draft Standard - Sediment and Water - Continuous On-Line Measurement of Water Content in Petroleum and Petroleum Products (First Edition)

International Electrotechnical Commission (IEC)

IEC 60733:1982 Determination of water in insulating oils, and in oil-impregnated paper and pressboard

SAE - SAE International

SAE AS405B-1958 Fuel and Oil Quantity Instruments

Society of Automotive Engineers (SAE)

SAE AS405C-2008 Fuel and Oil Quantity Instruments
SAE AS405B-1991 FUEL AND OIL QUANTITY INSTRUMENTS
SAE AS405A-1956 FUEL AND OIL QUANTITY INSTRUMENTS

GSO

OS GSO ISO 4366:2009 Hydrometry - Echo sounders for water depth measurements
NB/SH/T 6067-2022 Determination of carbon content in petroleum refining catalysts - Elemental analyzer method
GSO ISO 20495:2021 Traditional Chinese medicine — Skin electrical resistance measurement devices
BH GSO ISO 20495:2022 Traditional Chinese medicine — Skin electrical resistance measurement devices
GSO OIML R108:2007 REFRACTOMETERS FOR THE MEASUREMENT OF THE SUGAR CONTENT OF FRUIT JUICES

Japanese Industrial Standards Committee (JISC)

JIS B 7995:1994 Automatic analysers for sulphur in crude oil and petroleum products
JIS B 8572-3:2011 Fuel oil flow meters -- Measuring instruments used in transaction or certification -- Part 3: Small amount fuel oil flow meters
JIS B 8572-4:2011 Fuel oil flow meters -- Measuring instruments used in transaction or certification -- Part 4: Stationary fuel oil flow meters
JIS B 8572-2:2011 Fuel oil flow meters -- Measuring instruments used in transaction or certification -- Part 2: Small size fuel oil flow meters on road tankers
JIS B 8572-4:2014 Fuel oil flow meters.Measuring instruments used in transaction or certification.Part 4: Stationary fuel oil flow meters, fuel oil flow meters on road tankers, mobile type fuel oil flow meters
JIS B 7901:1998 Geodetic instruments -- Levels -- Field procedures for determining accuracy

KR-KS

KS B ISO 7858-1-2014 Measurement of water flow in closed conduits — Combination meters for cold potable water — Part 1: Specifications
KS B ISO 7858-3-2014 Measurement of water flow in closed conduits — Meters for cold potable water — Combination meters — Part 3: Test methods
KS B ISO 4366-2020 Hydrometry — Echo sounders for water depth measurements

Defense Logistics Agency

DLA A-A-52025 VALID NOTICE 1-2001 LEVELS, SURVEYING: ABNEY TYPE
DLA A-A-52025-1991 LEVELS, SURVEYING: ABNEY TYPE
DLA A-A-52025 VALID NOTICE 2-2007 Levels, Surveying: Abney Type

International Organization for Standardization (ISO)

ISO 8322-3:1989 Building construction; measuring instruments; procedures for determining accuracy in use; part 3: optical levelling instruments
ISO 4366:1979 Echo sounders for water depth measurements
ISO 3455:1976 Liquid flow measurement in open channels; Calibration of rotating-element current-meters in straight open tanks
ISO/TR 11974:1997 Measurement of liquid flow in open channels - Electromagnetic current meters
ISO 12857-1:1997 Optics and optical instruments - Geodetic instruments - Field procedures for determining accuracy - Part 1: Levels

AGMA - American Gear Manufacturers Association

2113-A97-1997 Measuring Instrument Calibration@ Gear Tooth Alignment Measurement

Spanish Association for Standardization (UNE)

UNE 7235:1971 DETERMINATION OF GREASE AND OIL CONTENTIN CONCRETE AND MORTAR PUGGING WATER
UNE 77080:2002 Water quality. Technical specifications for continuous dissolved oxygen measurements instruments in industrial wastes.

IN-BIS

IS 3032-1965 General requirements for testing the accuracy of commercial measuring instruments used in the petroleum trade

BE-NBN

NBN V 21-011-1978 Determination of the sait content of butter
NBN I-968-1969 Edible fats and oils. Margarine. Measurement of water content
NBN V 21-006-1976 Gravimetrie determination of the water content of butter
NBN V 21-010-1978 Gravimetrie determination of the solids non fat content of butter

American Society for Testing and Materials (ASTM)

ASTM D6531-24 Standard Practice for Relative Tinting Strength of Aqueous Ink Systems by Instrumental Measurement
ASTM F1779-08(2014) Standard Practice for Reporting Visual Observations of Oil on Water
ASTM F1779-97(2003) Standard Practice for Reporting Visual Observations of Oil on Water
ASTM F1779-08 Standard Practice for Reporting Visual Observations of Oil on Water
ASTM F1779-97 Standard Practice for Reporting Visual Observations of Oil on Water
ASTM D5349-95 Standard Test Method for Determination of the Moisture and Volatile Content of Sulfonated and Sulfated Oils by Hot-Plate Method
ASTM D5349-95(2006) Standard Test Method for Determination of the Moisture and Volatile Content of Sulfonated and Sulfated Oils by Hot-Plate Method
ASTM D5349-95(2001) Standard Test Method for Determination of the Moisture and Volatile Content of Sulfonated and Sulfated Oils by Hot-Plate Method
ASTM D8094-21 Standard Test Method for Determination of Water Content of Liquefied Petroleum Gases (LPG) Using an Online Electronic Moisture Analyzer
ASTM D8094-20 Standard Test Method for Determination of Water Content of Liquefied Petroleum Gases (LPG) Using an Online Electronic Moisture Analyzer
ASTM D5291-01 Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Petroleum Products and Lubricants
ASTM D8274-20a Standard Test Method for Determination of Biodiesel (Fatty Acid Methyl Esters) Content in Diesel Fuel Oil by Portable Rapid Mid-Infrared Analyzer
ASTM D8274-20 Standard Test Method for Determination of Biodiesel (Fatty Acid Methyl Esters) Content in Diesel Fuel Oil by Portable Rapid Mid-Infrared Analyzer
ASTM D8274-19 Standard Test Method for Determination of Biodiesel (Fatty Acid Methyl Esters) Content in Diesel Fuel Oil by Portable Rapid Mid-Infrared Analyzer
ASTM D5348-95 Standard Test Method for Determination of the Moisture Content of Sulfonated and Sulfated Oils by Distillation with Xylene

Indonesia Standards

SNI 7969-2014 Determination of bioethanol content in ethanol-gasoline-water extraction method

Standard Association of Australia （SAA）

AS 3778.6.4:2022 Measurement of water flow in open channels, Part 6.4: Measuring devices, instruments and equipment — Echo sounders for water depth measurements (ISO 4366:2007, IDT)
AS 3778.6.8:1992(R2009) Open channel water flow measurement Measuring devices, instruments and equipment Water measurement marine positioning equipment
AS 3778.6.5:1992 Measurement of water flow in open channels, Part 6.5: Measuring devices, instruments and equipment - Water level measuring devices

AR-IRAM

IRAM 5562-1956 How to measure the oil content in oil seeds

YU-JUS

JUS B.H8.006-1988 Petroleum and Iiquidpetroieum product Measurement od free water and sediment Manual methods

NL-NEN

NEN 3168-1969 Butyrometric determination of fat content of dried milk

ASHRAE - American Society of Heating@ Refrigerating and Air-Conditioning Engineers@ Inc.

ASHRAE GUIDELINE 22-2012 Instrumentation for Monitoring Central Chilled-Water Plant Efficiency

CEN - European Committee for Standardization

PREN 17277-2018 Hydrometry - Measurement requirements and classification of rainfall intensity measuring instruments

DIN

DIN EN 17277:2020 Hydrometry - Measurement requirements and classification of rainfall intensity measuring instruments; German version EN 17277:2019

GOST

GOST R 8.1010-2022 State system for ensuring the uniformity of measurements. Mass fraction of water in oil-gas-water mixture. Requirements to procedures (methods) of measurements

Others: Trace Water Meter,Oil in water meter,water meter,Portable Oil in Water Meter,oil in water