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General physics
Ionizing radiation
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Bulgaria, BIM (Bulgarian Institute of Metrology)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9 to 9.4 4.0E-3 9 to 9.4 5.0E-3
  • Mechanism for measurement service delivery : Primary measurement of Borate buffer
  • Measurement temperature 15 °C to 37 °C, data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates - Guggenheim convention (approximately 0.010, k=2)
  • Approved on 01 October 2022
  • Institute service identifier : 1.6.c-1
  • CMC ID : EURAMET-QM-BG-0000005P-2
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9.8 to 10.2 8.0E-3 9.8 to 10.02 1.0E-2
  • Mechanism for measurement service delivery : Primary measurement of carbonate buffer
  • Measurement temperature 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates - Guggenheim convention (approximately 0.010, k=2)
  • Approved on 01 October 2022
  • Institute service identifier : 1.6.c-2
  • CMC ID : EURAMET-QM-BG-0000005Q-2
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 6.7 to 7.6 4.0E-3
  • Mechanism for measurement service delivery : Calibration services, value assignment for proficiency testing scheme samples
  • Approved on 25 August 2020
  • Institute service identifier : 1.6.b-1
  • CMC ID : EURAMET-QM-BG-00000LAM-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 1.5 to 1.9 1.0E-2 1.5 to 1.9 1.0E-2
  • Mechanism for measurement service delivery : Primary measurement of tetroxalate buffer
  • Measurement temperature 25 °C to 37 °C, data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates - Guggenheim convention (approximately 0.010, k = 2)
  • Approved on 12 October 2022
  • Institute service identifier : 1.6.a-1
  • CMC ID : EURAMET-QM-BG-0000005M-3
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 6.7 to 7.6 4.0E-3 6.7 to 7.6 4.0E-3
  • Mechanism for measurement service delivery : Primary measurement of phosphate buffer
  • Measurement temperature 15 °C to 37 °C, data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates - Guggenheim convention (approximately 0.010, k=2)
  • Approved on 01 October 2022
  • Institute service identifier : 1.6.b-1
  • CMC ID : EURAMET-QM-BG-0000005O-2
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 1.5 to 1.9 1.0E-2
  • Mechanism for measurement service delivery : Calibration services, value assignment for proficiency testing scheme samples
  • Approved on 25 August 2020
  • Institute service identifier : 1.6.a-1
  • CMC ID : EURAMET-QM-BG-00000LAK-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9.8 to 10.2 8.0E-3
  • Mechanism for measurement service delivery : Calibration services, value assignment for proficiency testing scheme samples
  • Approved on 25 August 2020
  • Institute service identifier : 1.6.c-2
  • CMC ID : EURAMET-QM-BG-00000LAO-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 3.6 to 4.2 5.0E-3
  • Mechanism for measurement service delivery : Calibration services, value assignment for proficiency testing scheme samples
  • Approved on 25 August 2020
  • Institute service identifier : 1.6.a-2
  • CMC ID : EURAMET-QM-BG-00000LAL-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 9 to 9.4 4.0E-3
  • Mechanism for measurement service delivery : Calibration services, value assignment for proficiency testing scheme samples
  • Approved on 25 August 2020
  • Institute service identifier : 1.6.c-1
  • CMC ID : EURAMET-QM-BG-00000LAN-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous pH buffer solution 3.6 to 4.2 5.0E-3 3.6 to 4.2 5.0E-3
  • Mechanism for measurement service delivery : Primary measurement of Phthalate buffer
  • Measurement temperature 15 °C to 37 °C, data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates - Guggenheim convention (approximately 0.010, k=2)
  • Approved on 01 October 2022
  • Institute service identifier : 1.6.a-2
  • CMC ID : EURAMET-QM-BG-0000005N-2
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Relative expanded uncertainty in % Mass fraction in
blood serum copper 1 to 50 4.2 to 5
  • Mechanism for measurement service delivery : Reference measurement service and reference value assignment for PT
  • Approved on 15 October 2019
  • Institute service identifier : CHM 10
  • CMC ID : EURAMET-QM-BG-00000JX7-1
     
Pressure , Negative gauge pressure : 1.00E4 Pa to 1.00E5 Pa
Pressure balance
Absolute expanded uncertainty
5E-04p

p pressure in Pa

The uncertainty is expressed in Pa
Gas medium
Uncertainty values range from 5 Pa to 50 Pa
Approved on 11 October 2005
Institute service identifier : EUR-BIM-M-043
CMC ID : EURAMET-M-BG-000005MY-1
 
Pressure , Absolute pressure : 2.00E4 Pa to 7.00E6 Pa
Pressure balance
Absolute expanded uncertainty
1E-04p

p pressure in Pa

The uncertainty is expressed in Pa
Gas medium
Uncertainty values range from 2 Pa to 7E+02 Pa
Approved on 11 October 2005
Institute service identifier : EUR-BIM-M-041
CMC ID : EURAMET-M-BG-000005MV-1
 
Hygrometers , Humidity : 50 %rh to 90 %rh
Relative humidity sensors
Absolute expanded uncertainty : 2 %rh
Comparison in a climatic chamber
Air temperature : 20 °C to 50 °C
Approved on 17 August 2017
Institute service identifier : BIM/3.3.1
CMC ID : EURAMET-T-BG-00000B9X-1
 
Hygrometers , Humidity : 10 %rh to 30 %rh
Other hygrometer
Absolute expanded uncertainty : 1.4 %rh
Comparison in a climatic chamber
Air temperature : 20 °C to 50 °C
Approved on 17 August 2017
Institute service identifier : BIM/3.3.1
CMC ID : EURAMET-T-BG-00000BA1-1
 
Hygrometers , Humidity : 50 %rh to 90 %rh
Other hygrometer
Absolute expanded uncertainty : 2.2 %rh
Comparison in a climatic chamber
Air temperature : 1 °C to 20 °C
Approved on 17 August 2017
Institute service identifier : BIM/3.3.1
CMC ID : EURAMET-T-BG-00000BA0-1
 
Hygrometers , Humidity : 30 %rh to 50 %rh
Other hygrometer
Absolute expanded uncertainty : 1.8 %rh
Comparison in a climatic chamber
Air temperature : 1 °C to 20 °C
Approved on 17 August 2017
Institute service identifier : BIM/3.3.1
CMC ID : EURAMET-T-BG-00000B9Z-1
 
DC resistance , DC resistance standards and sources: high values : 1.00E7 Ω to 1.00E9 Ω
Fixed resistor: R
Relative expanded uncertainty : 3.2 µΩ/Ω to 1.1E2 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 Mohm","col_2":"3.2"},"row_3":{"col_1":"100 Mohm","col_2":"50"},"row_4":{"col_1":"1 Gohm","col_2":"110"}}
The expanded uncertainties given in this table are expressed in µΩ/Ω
Comparison by means of automated high resistance bridge
R : decade values
Measurements only at 23 °C in air bath
Approved on 06 August 2013
Institute service identifier : 75
CMC ID : EURAMET-EM-BG-00000DV6-1
 
Impedance (up to the MHz range) , Capacitance for dielectric capacitors : 0.01 µF to 1 µF
Fixed capacitor
Relative expanded uncertainty : 2.0E1 µF/F to 5.0E1 µF/F
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty in µF/F"},"row_2":{"col_1":"10 nF to 100 nF","col_2":"20 to 30"},"row_3":{"col_1":"200 nF to 1 µF","col_2":"50"}}
Comparison with capacitance bridge
Frequency : 1 kHz
Uncertainty is not varying linearly within the range.
Approved on 07 February 2019
Institute service identifier : 25
CMC ID : EURAMET-EM-BG-00000DU3-1
 
Impedance (up to the MHz range) , Inductance: self inductance, low values : 0.01 mH to 1 mH
Fixed inductor
Relative expanded uncertainty : 2.0E-2 H/H to 3.0E-4 H/H
Comparison with inductance bridge
Frequency : 1 kHz
Uncertainty is not varying linearly within the range
Approved on 06 August 2013
Institute service identifier : 26
CMC ID : EURAMET-EM-BG-00000DUU-1
 

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Acoustics, Ultrasound, Vibration

This metrology area covers the fields of acoustics, ultrasound and vibration.

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This metrology area covers the fields of DC and AC measurements, impedance, electric and magnetic fields, radiofrequencies and measurements on materials.

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This metrology area covers the fields of laser frequencies and dimensional metrology.

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This metrology area covers the fields of mass standards, force, pressure, density, hardness, torque, gravity and viscosity.

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Ionizing Radiation

This metrology area covers the fields of dosimetry, radioactivity and neutron measurements.