Wednesday, April 24, 2024

Pressure Metrology Division

What is Pressure Metrology?

  • Metrology is the science of measurement
  • Some important parameters of the measurement system are: precision, traceability, accuracy, error and uncertainty
  • Maintenance and calibration of the measurement system ensures the reliability and repeatability of the measurements


  • The laboratory reference standards and equipment used for the test / calibration are traceable to the National Reference Standards maintained at NPSL
  • The NPSL maintains International Traceability through the membership of the International Beauru of Weights and Measures (BIPM), France and Asia Pacific Metrology Program (APMP) and taking part in ILCs / PTs under the regional / international bodies mentioned above

Functions of Pressure Metrology Division

  • Realizing the primary standards and maintaining the national / reference standards in the field of pressure metrology
  • Maintaining the traceability of pressure standards through ILCs and bilateral arrangements with NMIs of other countries particularly in Asia Pacific region
  • To improve and develop measurement techniques for test / calibration in the field of pressure metrology, through conducting of specific R & D work
  • To provide test and calibration services to public / private industrial sector and other stake holder especially to the defense organizations of the country
  • To provide training, consultancy and advisory services to different public and private departments / organizations of the country in the field of pressure metrology
  • To carry out testing & standardization of pressure measuring equipment like, hydraulic, pneumatic and vacuum gauges, dead weight tester, calibrator, switches, modules, transmitters, transducers etc

Future Goals/ Targets/ Plans

  • To establish facilities of on-site calibration for the customers in the field of pressure metrology
  • To enhance the pressure measurement capabilities and facilities regarding range & accuracy for
    • Pressure Balance upto 60,000 psi and for low pressure upto 10-4 torr
  • Improvement in existing measurement techniques including uncertainty budget in the field of pressure measurements
  • Visit to concerned local industries to find out their problems related to test/calibration and extend expertise / services to them
  • In-house training of the metrologists on calibration techniques in pressure measurements under provision of BMR project
  • To enhance the range and accuracy of the parameters in the accredited scope related with pressure metrology
  • Participation in national / international ILCs and key comparisons in pressure parameters arranged by concerned metrology bodies and NMIs
  • Training of the metrologists on improved calibration techniques in pressure measurements from NMIs of the Asia Pacific Region and the developed countries
  • Interaction with other NMI’s and metrology institutes regarding expert visits and the latest calibration techniques
  • Realization and establishment of primary standards of pressure measurement and improvement in calibration techniques
  • Extension in accredited scope related with parameters of pressure measurement, especially for low pressure measurement
  • Strengthening of existing infrastructure & man power in the division
  • Improvement in the Calibration Measurement Capability (CMC) of parameters related with pressure measurement

Accredited Calibration Facilities

Hydraulic Pressure

Parameter Range Accuracy
(a) 10 to 18000 psi 0.015%
(b) 0.1 to 1100 bar 0.03%
(c) 10 to 10,000 psi 0.008%

Low Pressure (Pneumatic & Vacuum)

Parameter Range Accuracy
(a) -1 to 20 bar 0.015%
(b) 70----110 KPa, 10----16 psi 0.003%
(c) Upto 3000 psi 0.008%

Hydraulic Dead Weight Tester

Hydraulic Dead Weight Tester

Contact Personnel

Head Pressure Metrology Division
Phone: +92 51 9257462-7, Ext. 243
Fax: +92 519258162

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