Home    Key and supplementary comparisons    Calibration and Measurement Capabilities - CMCs
The BIPM key comparison database
Refine your search
CMC AREA
CMCs General Physics (449)
CMCs Chemistry (447)
CMCs Ionizing Radiation (180)
PHYSICS >
Materials
Properties of materials (65)
Temperature (56)
Properties of detectors and sources (55)
Radio frequency measurements (50)
Dimensional metrology (45)
AC voltage, current, and power (20)
Electric and magnetic fields (18)
Fluid flow (14)
Impedance up to the MHz range (13)
Photometry (11)
Sound in water (11)
DC voltage, current, and resistance (11)
IONIZING RADIATION >
Surface emission rate
Activity (76)
Activity per unit mass (31)
Absorbed dose to water (15)
Fluence rate (14)
Emission rate (10)
Air kerma (10)
Ambient dose equivalent rate (6)
Personal dose equivalent rate (6)
Emission anisotropy (6)
Activity per unit volume (2)
CHEMICAL MATERIAL >
nitrogen (179)
methane (44)
synthetic air (26)
monoelemental solution (14)
nitrogen or air (14)
CHEMICAL ANALYTE >
propane
methane (21)
carbon dioxide (13)
carbon monoxide (12)
ethane (9)
sulfur dioxide (8)
GEOGRAPHIC LOCATION
EURAMET (1076)
United Kingdom (1069)
Denmark (7)
Result of the search
Your query 'United Kingdom' produced more than 1000 results New search
1  2  3 [Next >>]

 
United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Acoustics, Ultrasound, Vibration for United Kingdom (.PDF file)
Free-field sensitivity level. Reference measuring hydrophones/ projectors. Measurand unit, V/µPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.7
Three-transducer spherical wave reciprocity in a laboratory tank, IEC 565:1977
Frequency: 1 kHz to 2 kHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/10/01
 
Free-field sensitivity level. Reference measuring hydrophones/ projectors. Measurand unit, V/µPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.5
Three-transducer spherical wave reciprocity in a laboratory tank; IEC 565:1977
Frequency: 2 kHz to 500 kHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/10/01
 
Free-field sensitivity level. Reference measuring hydrophones. Measurand unit, V/µPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.9
Comparison with reference hydrophone, IEC 565:1977
Frequency: 1 kHz to 2 kHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/10/02
 
Free-field sensitivity level. Reference measuring hydrophones. Measurand unit, V/µPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.7
Comparison with reference hydrophone, IEC 565:1977
Frequency: 2 kHz to 1 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/10/02
 
Pressure sensitivity level. Reference measuring hydrophones. Measurand unit, V/µPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.5
Comparison with a calibrated reference microphone
Frequency: 25 Hz to 400 Hz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/10/03
 
Free-field sensitivity. Hydrophone. Measurand unit, µV/Pa
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 6
Comparison with a secondary hydrophone in a non-linearly distorted sound field
Frequency: 1 MHz to 8 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/07/01
 
Free-field sensitivity. Hydrophone. Measurand unit, µV/Pa
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 7
Comparison with a secondary hydrophone in a non-linearly distorted sound field
Frequency: 9 MHz to 12 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/07/01
 
Free-field sensitivity. Hydrophone. Measurand unit, µV/Pa
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 8
Comparison with a secondary hydrophone in a non-linearly distorted sound field
Frequency: 13 MHz to 16 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/07/01
 
Free-field sensitivity. Hydrophone. Measurand unit, µV/Pa
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 11
Comparison with a secondary hydrophone in a non-linearly distorted sound field
Frequency: 17 MHz to 20 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/07/01
 
Ultrasonic power. Plane piston ultrasound transducer and generator, 0.0005 W to 1 W
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 2.5 to 6
Primary standard radiation force balance
Frequency: 0.8 MHz to 20 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/08/05
 
Ultrasonic power. Plane piston ultrasound transducer and generator, 0.50 W to 20 W
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 3.5 to 5
Calibrated radiation force balance
Frequency: 0.8 MHz to 3 MHz
Approved on 29 September 2004
Internal NMI service identifier: NPL/AW/08/05
 
Transmittance, regular, spectral. Spectrally-neutral material, 1E-03 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 2.7E-05 to 1.6E-03, varies as the logarithm of the measurand
Reference spectrophotometer
Wavelength: 200 nm to 209 nm
Bandwidth: < 3 nm
 
Transmittance, regular, spectral. Spectrally-neutral material, 1E-03 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 4E-05 to 6E-04, varies as the logarithm of the measurand
Reference spectrophotometer
Wavelength: 210 nm to 219 nm
Bandwidth: < 3 nm
 
Transmittance, regular, spectral. Spectrally-neutral material, 1E-03 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 3E-05 to 4E-04, varies as the logarithm of the measurand
Reference spectrophotometer
Wavelength: 220 nm to 249 nm
Bandwidth: < 3 nm
 
Emittance, spectral. General material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.003 to 0.001, varies with wavenumber
Spectrophotometer with reflectometer
Wavelength range: 4000 cm-1 to 180 cm-1
Bandwidth: 2 cm-1 to 10 cm-1
Specific measurement conditions: regular reflectometer
Regular reflectance measurements
Approved on 07 May 2007
 
Emittance, spectral. General material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.04 to 0.004, varies with wavenumber
Spectrophotometer with reflectometer
Wavelength range: 4000 cm-1 to 180 cm-1
Bandwidth: 2 cm-1 to 10 cm-1
Specific measurement conditions: hemispherical reflectometer
 
BRDF. General material, 0.0008 sr-1 to 1000 sr-1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.00003 + 0.0034R)
Reference reflectometer
Wavelength range: 350 nm to 400 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007
 
BRDF. General material, 0.0003 sr-1 to 1000 sr-1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.00003 + 0.0019R)
Reference reflectometer
Wavelength range: 400 nm to 1000 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007
 
Reflectance factor. General material, 0.25 % to 300000 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.01% + 0.0034R)
Reference reflectometer
Wavelength range: 350 nm to 400 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007
 
Reflectance factor. General material, 0.1 % to 300000 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.01% + 0.0019R)
Reference reflectometer
Wavelength range: 400 nm to 1000 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007