Sign In |Help & Support
ALL SECTORS
  • ALL SECTORS
  • GB(National Standard)
  • CB(Shipping)
  • CECS(Engineering Construction)
  • CJ(Urban Construction)
  • CY(News and Publication)
  • DB(Provincial Standard)
  • DL(Electricity & Power)
  • DZ(Geology & Mineralogy)
  • FZ(Spinning & Textile)
  • GA(Public Security)
  • HB(Aviation)
  • HG(Chemical Industry)
  • HJ(Environmental Protection)
  • JB(Machinery)
  • JC(Building Materials)
  • JG(Building & Construction)
  • JJ(Metering)
  • JT(Highway & Transportation)
  • LY(Forestry)
  • MT(Coal)
  • NB(Energy)
  • NY(Agriculture)
  • QB(Light Industry)
  • QC(Automobile & Vehicle)
  • QJ(Aerospace)
  • SH(Petrochemical)
  • SJ(Electronics)
  • SL(Water Resources)
  • SN(Commodity Inspection)
  • SY(Oil & Gas)
  • TB(Railway & Train)
  • YB(Ferrous Metallurgy)
  • YC(Tobacco)
  • YD(Telecommunication)
  • YY(Medical Device)
Database: 365,228(8 Aug 2026)

Four-in-one gas detector detection

Four-in-one gas detector detection, Total:292 items.

The international standard classification for "Four-in-one gas detector detection" includes: Air quality , Acoustics and acoustic measurements , Protective equipment , Measuring instruments , Protection against dangerous goods , Electricity. Magnetism. Electrical and magnetic measurements , Geology. Meteorology. Hydrology , Laboratory ware and related apparatus , Non-destructive testing , Farming and forestry , Industrial process measurement and control , Occupational safety. Industrial hygiene , Anaesthetic, respiratory and reanimation equipment , Welded joints , Diagnostic, maintenance and test equipment , Other standards related to road engineering .

The Chinese standard classification for "Four-in-one gas detector detection" includes: Environmental monitoring instrument and its complete equipment , Chemical Measurement , Radio Measurement , Length Measurement , Acoustic Measurement , Safety requirements on protection equipment , Material composition analysis instrument and environment detection instrument in general , Production environment safety and health facilities , Hydrology and water conservancy instrument , Industrial dust and gas prevention technology , Ultrasonic wave and sound radiation defectoscope , X ray, magnetic powder, fluorescent light and other defectoscope , Drug testing instrument , Plant quarantine, pest control , Labor sanitation , Hygiene, safety and labor protection , Basic standards and general methods , Welding and cutting , Highway vehicle servicing installation , Operating equipment, instrument and meter .


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

Group Standards of the People's Republic of China

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

  • GB/T 21254-2007 Breath alcohol analyzers
  • GB 7230-1987 Gas detector tube units
  • GB/T 27669-2011 Non-destructive testing - Ultrasonic inspection - Evaluating electronic characteristics of ultrasonic test instruments
  • GB/T 21254-2017 Breath alcohol analyzer
  • GB/T 3412.1-2009 Instrument for dam monitoring—Readout unit—Part 1:Readout unit for vibrating wire type transducer
  • GB/T 14480.1-2015 Non-destructive testing instruments―Equipment for eddy current examination―Part 1:Instrument characteristics and verification
  • GB/T 7230-2008 Gas detector tube measurement system
  • GB 12358-2006 Gas monitors and alarms for workplace General technical requirements
  • GB/T 26832-2011 Non-destructive testing instruments - Specifications for the wire rope electromagnetic tester
  • GB/T 31473-2015 Halogen gas leak detector
  • GB 12358-1990 Gas monitors and alarms for workplace atmosphere general technical requirements

Henan Provincial Standard of the People's Republic of China

  • DB41/T 1276-2016 Portable combustible gas inspection instrument
  • DB41/T 1522-2018 Technical specification for inspection and detection of flammable and toxic gas alarms

Professional Standard - Machinery

  • JB/T 11611-2013 Non-destructive testing instrument — Eddy current and magnetic memory integrated testing instrument
  • JB/T 11605-2013 Non-destructive testing instruments — Metal magnetic memory instrument - technical requirments
  • JB/T 11259-2011 Non-destructive testing instrument —Multifrequency eddy current testing equipment
  • JB/T 5754-2011 Non-destructive testing instruments —Specifications for one-channel acoustic emission testing instrument
  • JB/T 11609-2013 Non-destructive testing instrument - Acoustic impact testing instrument
  • JB/T 12389-2015 Integrated flame detector
  • JB/T 11780-2014 Non-destructive Testing Instrument - Characterization and Verification of Array Eddy Current Testing Instrument
  • JB/T 20156-2013 Particle counter
  • JB/T 12456-2015 Non-destructive testintg instruments-Technical requirements of X-ray delector for circuit board detection
  • JB/T 12454-2015 Nondestructive testing instruments-Swept frequency acoustical testing instrument
  • JB/T 12457-2015 Non-destructive testing instruments-Testing method of X-ray delector for circuit board detection
  • JB/T 11260-2011 Non-destructive testing instruments — Acoustic pulse reflectometry instrument
  • JB/T 11779-2014 Non-Destructive Testing Instrument - Specifications for Phased Array Ultrasonic Testing Instruments
  • JB/T 11612-2013 Non-destructive testing instrument — Eddy current and magnetic flux leakage integrated testing instrument
  • JB/T 12455-2015 Nondestructive testing instruments―Swept frequency eddy current testing instrument
  • JB/T 12458-2015 Non-destructive testing instruments - - Multi-channel digital ultrasonic testing instrument
  • JB/T 5525-2011 Non-destructive testing instruments —characteristics measured method for one-channel eddy current testing instrument
  • JB/T 11277-2012 Non-destructive testing instruments — Single channel acoustic impedance instrument
  • JB/T 11610-2013 Non-destructive testing instrument — Specifications for digital ultrasonic testing instruments
  • JB/T 11601-2013 Non-destructive testing instrument - Visual testing Equipment

Professional Standard - Agriculture

  • NY/T 2418-2013 Detection and identification of Callosobruchus maculatus (Fabricius)
  • JAP-136 Tetrazolinone detection method
  • JJF 2113-2024 Calibration specifications for acrylonitrile gas detectors
  • JAP-135 Tetramethazine detection method

Professional Standard - Chemical Industry

工业和信息化部

  • JB/T 13941-2020 Nondestructive testing instrument - Remote-field eddy current testing equipment
  • JB/T 13937-2020 Nondetructive testing instrument -Laser ultrasonic visualizing inspector
  • JB/T 13940-2020 Nondestructive instruments - Eddy current electrical conductivity gauge
  • JB/T 13935-2020 Nondestructive testing instrument - UltrasonicUltrasonic time-of-flight diffraction testing instrument
  • HG/T 5722-2020 Tester on gas impermeability of rubber
  • HG/T 3987-2016 Electrochemical hydrogen sulfide gas detecting instrument
  • JB/T 13939-2020 Nondestructive testing instruments - Eddy current thickness gauge

化学工业部

  • HG/T 2359-1992 Electrochemical harmful gas detection alarm instrument

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 33887-2017 Non-destructive testing instruments--Industrial optical fiber endoscope detector
  • GB/T 33886-2017 Non-destructive testing instruments--Industrial electronic endoscopic detector
  • GB/T 33889-2017 Non-destructive testing instrument--Specification for eddy current-magnetic flux leakage integrated instrument

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

  • JJF 1363-2019 Program of Pattern Evaluation of Sulfur Hydrogen Gas Detectors
  • JJF 1785-2019 Program of Pattern Evaluation of Breath Alcohol Analyzers
  • JJF 1948-2021 Calibration Specification for Gasoline Vapor Recovery Detectors
  • JJF 1364-2012 Program of Pattern Evaluation of Sulfur Dioxide Gas Detectors
  • JJF 1764-2019 Program of Pattern Evaluation of Hydrogen Sulfide Gas Detectors for Mining
  • JJF 1822-2020 Calibration Specification for Urea Analyzers of Water Sample Detection
  • JJF 1433-2013 Calibration Specification for Chlorine Alarm Detectors

未注明发布机构

  • ASTM RR-D03-2001 2022 D7493-Test Method for Online Measurement of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatograph and Electrochemical Detection
  • DIN EN 14624 E:2003-04 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • DIN 51350-3 E:2013-12 Testing of lubricants; testing in the Shell four-ball tester, determination of wearing caracteristics of liquid
  • DIN EN ISO 20485 E:2016-10 Non-destructive testing leak detection tracer gas method (draft)
  • DIN EN 13185 Berichtigung:2004 Non-destructive testing – leak testing – test gas method; German version EN 13185:2001
  • DIN 51350-3:2008 Testing of lubricants; testing in the Shell four-ball tester, determination of wearing caracteristics of liquid
  • DIN EN 14624 E:2018-09 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • ANSI/ISA TR92.06.03-2008(2013) Feasibility of Chlorine Detection Instrument Testing
  • DIN 51350-2 E:2013-12 Testing of lubricants; testing in the Shell-four-ball tester, determination of welding load of fluid lubricants
  • DIN 51350-2:2008 Testing of lubricants; testing in the Shell-four-ball tester, determination of welding load of fluid lubricants

Occupational Health Standard of the People's Republic of China

  • GBZ/T 222-2009 Guideline for selection of direct-reading gas detector in the confined space
  • GBZ/T 206-2007 Specification for gas detection in confined space by direct-reading detectors

Jilin Provincial Standard of the People's Republic of China

国家发展和改革委员会

  • MT/T 980-2006 Carbon monoxide components for coal mine gas detection

Professional Standard - Coal

  • MT 980-2006 Coal mine gas detection using a carbon monoxide pieces

Hebei Provincial Standard of the People's Republic of China

  • DB13/T 2518-2017 Specifications for inspection and testing of combustible gas and toxic gas detection and alarm systems in industrial enterprises

国家市场监督管理总局、中国国家标准化管理委员会

  • GB/T 40732-2021 Non-destructive testing of welds—Ultrasonic testing—Testing of welds in austenitic steels and nickel-based alloys
  • GB/T 40023-2021 Non-destructive testing instruments - Ultrasonic time-of-flight diffraction instrument - Technical requirements
  • GB/T 40336-2021 Non-destructive testing—Leak testing—Calibration of reference leaks for gases
  • GB/T 40335-2021 Non-destructive testing—Leak testing—Tracer gas method
  • GB/T 39849-2021 Non-destructive testing instruments—Ultrasonic time-of-flight diffraction instrument—Methods of performance tests

Professional Standard - Traffic

交通运输部

Liaoning Provincial Standard of the People's Republic of China

  • DB21/T 2612-2016 Specifications for performance testing of meteorological wind speed observation instruments

Professional Standard-Safe Production

  • AQ/T 3044-2013 Technical specification for ammonia detection instruments

工业和信息化部/国家能源局

  • JB/T 13150-2017 Nondestructive testing instrument. Variable array probe for eddy current testing instrument
  • JB/T 20185-2017 Pyrogen tester
  • JB/T 12725-2016 Non-destructive testing instruments. Ultrasonic automatic detection system

Professional Standard - Electron

  • SJ/T 31122-1994 Requirements of readiness and methods of inspection and assessment for four-point probes

Professional Standard - Electricity

  • DL/T 1985-2019 Determination of mining ratio of SF6 gas mixture
  • DL/T 1876.1-2018 Technical specifications for SF6 measuring device- Decomposition products measuring device

Korean Agency for Technology and Standards (KATS)

SCC

  • CSA C22.2 No.152-M1984-1984(R2016) Combustible Gas Detection Instruments
  • CSA C22.2 No.152-1976 Combustible Gas Detection Instruments
  • CEI EN IEC 62990-1:2023 Workplace Atmospheres Part 1: Gas detectors - Performance requirements of detectors for toxic gases
  • DIN EN IEC 62990-1/AA E:2022 Draft Document - Workplace Atmospheres - Part 1: Gas detectors - Performance requirements of detectors for toxic gases; German and English version prEN IEC 62990-1:2021/prAA:2022
  • BS 5343-1:1986 Gas detector tubes-Specification for short term gas detector tubes
  • CEI EN IEC 62990-2:2022 Workplace atmospheres Part 2: Gas detectors - Selection, installation, use and maintenance of detectors for toxic gases and vapors
  • DIN EN IEC 62990-1 E:2022 Draft Document - Workplace Atmospheres - Part 1: Gas detectors - Performance requirements of detectors for toxic gases (IEC 62990-1:2019 + COR1:2019); German version prEN IEC 62990-1:2021
  • NS-EN 1518:1998 Non-destructive testing — Leak testing — Characterization of mass spectrometer leak detectors
  • NS-EN 13625:2001 Non-destructive testing — Leak test — Guide to the selection of instrumentation for the measurement of gas leakage
  • DANSK DS/EN 13625:2002 Non-destructive testing - Leak test - Guide to the selection of instrumentation for the measurement of gas leakage
  • NS-EN 13185:2001 Non-destructive testing — Leak testing — Tracer gas method
  • BS 5343:1976 Specification. Gas detector tubes
  • NS-EN 14624:2020 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • DANSK DS/EN 14624:2020 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • DANSK DS/EN 1518:1998 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors
  • AENOR UNE-EN ISO 20485:2018 Non-destructive testing - Leak testing - Tracer gas method (ISO 20485:2017)
  • AENOR UNE-EN 1518:1999 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors
  • AS 2275.2:1979 Combustible gas detection instruments for use in explosive atmospheres - Performance requirements
  • NS-EN ISO 20485:2018 Non-destructive testing — Leak testing — Tracer gas method (ISO 20485:2017)
  • NS-EN 13192:2001 Non destructive testing — Leak testing — Calibration of reference leaks for gases

British Standards Institution (BSI)

  • BS 6020-1:1981 Instruments for the detection of combustible gases - Specification for general requirements and test methods
  • BS EN 50241-2:1999 Specification for open path apparatus for the detection of combustible or toxic gases and vapours - Performance requirements for apparatus for the detection of combustible gases
  • BS EN 45544-3:2015 Workplace atmospheres. Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours. Performance requirements for apparatus used for general gas detection
  • BS 5343-2:1991 Gas detector tubes - Specification for long term gas detector tubes
  • BS 6020-5:1982 Instruments for the detection of combustible gases - Specification for performance requirements for Group II instruments reading up to 100% gas
  • BS EN 14624:2020 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • BS EN 62382:2007 Electrical and instrumentation loop check

German Institute for Standardization

  • DIN 51350-2:2010 Testing of lubricants - Testing in the four-ball tester - Part 2: Determination of welding load of liquid lubricants
  • DIN 51350-2:2015 Testing of lubricants - Testing in the four-ball tester - Part 2: Determination of welding load of liquid lubricants
  • DIN 51350-1:2015 Testing of lubricants - Testing in the four-ball tester - Part 1: General working principles
  • DIN 51350-1:2010 Testing of lubricants - Testing in the four-ball tester - Part 1: General working principles
  • DIN 51350-3:2010 Testing of lubricants - Testing in the four-ball tester - Part 3: Determination of wearing characteristics of liquid lubricants
  • DIN 51350-3:2015 Testing of lubricants - Testing in the four-ball tester - Part 3: Determination of wearing characteristics of liquid lubricants
  • DIN EN 13625:2002-03 Non-destructive testing - Leak test - Guide to the selection of instrumentation for the measurement of gas leakage; German version EN 13625:2001
  • DIN 51350-2:1977 Testing of lubricants; testing in the Shell-four-ball tester, determination of welding load of fluid lubricants
  • DIN 51350-3:1977 Testing of lubricants; testing in the Shell four-ball tester, determination of wearing caracteristics of liquid
  • DIN EN 50270:2007 Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen; German version EN 50270:2006
  • DIN EN ISO 20485:2018-05 Non-destructive testing - Leak testing - Tracer gas method (ISO 20485:2017); German version EN ISO 20485:2018
  • DIN 51350-4:2015 Testing of lubricants - Testing in the four-ball tester - Part 4: Determination of welding load of consistent lubricants
  • DIN EN 14624:2020 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • DIN EN 14624:2020-08 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants; German version EN 14624:2020
  • DIN EN 1518:2019-06 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors; German version EN 1518:1998
  • DIN EN 1518:2019 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors
  • DIN EN ISO 20485:2018 Non-destructive testing - Leak testing - Tracer gas method (ISO 20485:2017)
  • DIN EN ISO 20486:2018-05 Non-destructive testing - Leak testing - Calibration of reference leaks for gases (ISO 20486:2017); German version EN ISO 20486:2018
  • DIN 51853:2011 Testing of fuel gases - Sampling

AT-ON

VDE - VDE Verlag GmbH@ Berlin@ Germany

  • VDE 0400-990-1-2017 Workplace Atmospheres - Part 1: Gas detectors - Performance requirements of detectors for toxic gases (IEC 31/1322/CDV:2017)

European Committee for Standardization (CEN)

  • EN 13625:2001 Non-destructive testing - Leak test - Guide to the selection of instrumentation for the measurement of gas leakage

Danish Standards Foundation

  • DS/EN 50291-1:2021 Gas detectors – Electrical apparatus for the detection of carbon monoxide in domestic premises – Part 1: Test methods and performance requirements
  • DS/EN 13185/A1:2004 Non-destructive testing - Leak testing - Tracer gas method
  • DS/EN 13625:2002 Non-destructive testing - Leak test - Guide to the selection of instrumentation for the measurement of gas leakage
  • DS/EN 1518:1999 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors

SE-SIS

  • SIS SS IEC 759:1986 Nuclear instrumentation —Test procedures for semiconductor X-ray energy spectrometers
  • SIS SS-EN 50 055-1992 Electrical apparatusfor the detection and measurement ofcombustible gases - Performance requirements for Group I apparatus indicating upto5% (v/v) methane in air
  • SIS SS IEC 692:1984 Nuclear instrumentation — Density meters utilizing ionizing radiation — Definitions and test methods
  • SIS SS IEC 476:1989 Nudear instrumentation — Electrical measuring instruments utilizing radioactive sources
  • SIS SS IEC 412:1983 Nuclear instrumentation - Standard dimensions of scintillators
  • SIS SS IEC 231:1983 Nuclear instrumentation - General principles of nuclear reactor instrumentation

Indonesia Standards

  • SNI 13-3621-1994 Air quantity measurement travers method in underground mining by vane anemometer instruments

Society of Automotive Engineers (SAE)

Association Francaise de Normalisation

  • NF EN 13625:2002 Non-destructive testing - Leak testing - Guide for the selection of instruments used for measuring gas leaks
  • NF C23-541-2:2005 Specification for open path apparatus for the detection of combustible or toxic gases and vapours - Part 2 : performance requirements for apparatus for the detection of combustible gases.
  • NF EN ISO 20485:2018 Essais non destructifs - Contrôle d'étanchéité - Méthode par gaz traceur
  • NF A09-492*NF EN ISO 20485:2018 Non-destructive testing - Leak testing - Tracer gas method
  • NF EN 14624:2020 Performance of portable leak detectors and fixed gas detectors for all refrigerants
  • NF C23-570:2007 Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen.
  • NF C23-570*NF EN 50270:2015 Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen
  • NF E35-422*NF EN 14624:2020 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants
  • NF EN ISO 20486:2018 Non-destructive testing - Leak testing - Calibration of reference gas leaks
  • NF A09-320-1:2010 Non-destructive testing - Characterization and verification of ultrasonic testing equipment - Part 1 : instruments.
  • NF A09-461*NF EN ISO 20486:2018 Non-destructive testing - Leak testing - Calibration of reference leaks for gases

SAE - SAE International

KR-KS

  • KS C IEC 61779-5-2003(2023) Electrical devices for detecting and measuring combustible gases - Part 5 Performance requirements for Group II devices for detecting combustible gas volume fraction
  • KS C IEC 61779-3-2003(2023) Electrical devices for detecting and measuring combustible gases - Part 3 Performance requirements for Group I devices for detecting methane volume fraction
  • KS C 6591-2007(2023) Installation, operation and maintenance of combustible gas detection instruments
  • KS C 6592-2007(2023) Performance requirements for toxic gas-Detection instruments:Hydrogen sulfide
  • KS C IEC 61779-4-2003(2023) Electrical devices for detecting and measuring combustible gases - Part 4 Performance requirements for Group II devices for detecting lower explosion limit volume fraction
  • KS C IEC 61779-2-2003(2023) Electrical devices for detecting and measuring combustible gases - Part 2 Performance requirements for Group I devices for detecting methane volume fraction below 5%
  • KS B ISO 20486-2023 Non-destructive testing — Leak testing — Calibration of reference leaks for gases
  • KS C 6593-2007(2023) Installation, operation and maintenance of toxic gas-Detection instruments:Hydrogen sulfide

HU-MSZT

Underwriters Laboratories (UL)

AENOR

CEN - European Committee for Standardization

  • EN ISO 20485:2018 Non-destructive testing - Leak testing - Tracer gas method
  • EN ISO 20486:2018 Non-destructive testing - Leak testing - Calibration of reference leaks for gases

International Organization for Standardization (ISO)

  • ISO 20485:2017 Non-destructive testing - Leak testing - Tracer gas method
  • ISO 20486:2017 Non-destructive testing - Leak testing - Calibration of reference leaks for gases

Lithuanian Standards Office

  • LST EN 13185-2002/A1-2004 Non-destructive testing - Leak testing - Tracer gas method
  • LST EN 13185-2002 Non-destructive testing - Leak testing - Tracer gas method
  • LST EN 13625-2002 Non-destructive testing - Leak test - Guide to the selection of instrumentation for the measurement of gas leakage
  • LST EN 1518-2001 Non-destructive testing - Leak testing - Characterization of mass spectrometer leak detectors

ES-UNE

  • UNE-EN ISO 20485:2018 Non-destructive testing - Leak testing - Tracer gas method (ISO 20485:2017)
  • UNE-EN 14624:2021 Performance of portable locating leak detectors and of fixed gas detectors for all refrigerants

ISA - International Society of Automation

RU-GOST R

  • GOST 29074-1991 Equipment for monitoring of radiation situation. General requirements
  • GOST R 8.663-2009 State system for ensuring the uniformity of measurements. State verification schedule for force measuring instruments
  • GOST 13005-1967 Interferometers for determination of liqnid and gas concentration. Methods and means for verification
  • GOST R 8.766-2011 State system for ensuring the uniformity of measurements. State verification schedule for instruments measuring mass concentration dissolving in water gasses (oxygen, hydrogen)

GSO

  • BH GSO ISO 18249:2022 Non-destructive testing — Acoustic emission testing — Specific methodology and general evaluation criteria for testing of fibre-reinforced polymers
  • GSO ISO 18249:2021 Non-destructive testing — Acoustic emission testing — Specific methodology and general evaluation criteria for testing of fibre-reinforced polymers
  • OS GSO ISO 22825:2013 Non-destructive testing of welds -- Ultrasonic testing -- Testing of welds in austenitic steels and nickel-based alloys

Japanese Industrial Standards Committee (JISC)

ZA-SANS

  • SANS 61779-6:1999 Electrical apparatus for the detection and measurement of flammable gases Part 6: Guide for the selection, installation, use and maintenance of apparatus for the detection and measurement of flammable gases
  • SANS 12710:2003 Non-destructive testing - Ultrasonic inspection - Evaluating electronic characteristics of ultrasonic test instruments

International Electrotechnical Commission (IEC)