सीएसआईआर-राष्ट्रीय भौतिक प्रयोगशाला

CSIR-National Physical Laboratory

Brief About New Facilities Created

  • Robotic Mass Comparator
    Advanced Robotic Mass Comparator of 5 g has been received at CSIR-NPL in 2020. Installation and commencing are under process.
  • Vacuum Mass Comparator
    Vacuum mass comparator is a unique and state-of-art facility that serves both the fundamental research and highly accurate measurement in mass. The computer operated electronic vacuum mass comparator features a vacuum chamber and a load alternator with eight positions for holding masses as well as spheres (used as primary standards of density) and is capable of comparing mass against each other with highest accuracy. 1 kg vacuum mass comparator will be used to experimentally determine the air density by comparison weighing of buoyancy artefacts in air and vacuum.
  • 50 kg Mass Comparator
    AX64004 is an automatic mass comparator which is based on computer operation, has four positions for weight alternator. It has a modern and fast weighing system. Independent draft shields protect from air current effect. The self-centric mechanism reduces the eccentric load errors.
  • A new stylus based surface texture parameters measuring instrument for surface roughness and contour measurements has been established in Length, Dimension and Nanometrology section. This instrument is capable of characterizing the surface of a workpiece for various surface texture parameters such as Ra, Rq, Rz, Rp, Rpmax, Rvmax, Rt, Sm, Sk etc. and contour features with resolution <1 nanometer, benefiting various manufacturing and automobile industries and helping us to increase the total number of our CMCs. This instrument has a working range of 200 mm in X axis with probe measurement range of 12 mm in Z axis. The resolution of measuring probe in Z axis is 0.8 nm and the motorized/ CNC column length in Z axis is 500 mm.
  • Temperature and Humidity Metrology Section indigenously designed and developed facility for the Testing of IR Clinical Thermometers at CSIR-NPL as per Standard – IS/ISO 80601-2-56: 2017 and is being used for the testing of various IR clinical thermometers in this pandemic situation of COVID-19.
  • We have designed and developed setup for calibration of clinical thermometers (mercury and digital) under a collaborative project with Legal metrology and the facility has been delivered at 2 RRSL labs.
  • Set-up for testing of thermal imagers is being developed at CSIR-NPL. Till now, there is no such testing facility available in India to test the imagers imported from outside. This unique facility will support industries and laboratories for apex calibration and testing of thermal imagers.
  • Calibration facility for hygrometers has been set-up by procuring new humidity generator of Thunder Scientific-2500 based on temperature-pressure parameters with significant stability of better than 0.1% and capable of providing calibration in the range 10% to 95% RH with an uncertainty of 0.3% RH.
    Temperature, Humidity and Moisture measurement services are given below:
  • Currently, Optical Radiation Metrology Section is working towards establishing a facility for calibration and LED based lighting. The project entitled “Creation of Testing and Calibration Facility for LED and LED based Lighting at NPL India as per National/International Standards” is jointly funded by BEE, Government of India and CSIR. The lab would house facility which would be instrumental to provide calibration, testing and consultancy services with respect to LED based lights. The laboratory would also be used to impart skill education in LED photometry through training. It would strengthen the measurement capability through international, bilateral and multilateral comparisons, Proficiency Testing and Inter-laboratory Comparisons.Under the BEE and CSIR funded project “Creation of Testing and Calibration Facility for LED and LED based Lighting at NPL India as per National/International Standards” two equipment have been installed very recently at CSIR-NPL.
    (i) C-type Goniophotometer System: Under this program very recently a C-type Goniophotometer System has been established at CSIR-NPL for providing calibration and testing facility related to luminous flux and other parameters to industries, testing and calibration labs, R&D organizations etc.

    C-type Goniophotometer System

    (ii) Optical Radiation Test System: With the advent of energy efficient LED lighting the concern for blue light hazard has also increased for which CSIR-NPL is establishing a facility for testing Photobiological safety of LED based luminaires.

    Optical Radiation Test System

    Further, temperature dependent luminous flux maintenance testing is also envisaged to be established.
    In very near future CSIR-NPL will establish a full-fledged laboratory for calibration and testing of LED lamps and luminaires. After installation the equipment will be prepared for disseminating calibration and measurement services as per national and international standards and international key comparisons.

  • CSIR-National Physical Laboratory has established several force machines including dead weight machines as the primary standard for the realization of forces and dissemination of the same to the user organizations in the range of up to 3000 kN having the uncertainty varying from 0.±002% to ±0.05% depending upon the method employed for the realization of the forces Since there is a great demand for the calibration of force transducer of higher capacity in the market, it has established a force calibration machine of 3000 kN capacity using a build-up system by comparison method in order to carter to the need of such industries and to provide the necessary traceability in measurement in such ranges as shown in the figure.

    Build up System

  • Ultrasonic Energy Meter Calibration Facility: Ultrasonic cleaning is being used widely in hospitals, industries and electronics manufacturing etc. The amount of ultrasonic energy radiated from the transducers ultimately causes the effective cleaning. Based the demand from industry we started working on the establishment of ultrasonic energy calibration facility with traceability to national standard.

    Snap showing the experimental setup of ultrasonic energy calibration facility

  • Calibration/testing system for non-invasive blood pressure monitoring system: In 2019, Government of India amended the medical device rule of 2017 and added a list of 36 medical devices for which the type approval and related certification became mandatory. In this list, blood pressure (BP) monitoring devices (including digital type) is also present. At that time, the lack of proper infrastructure for testing facility of BP monitoring devices in India created an obstruction for the implementation of the amendment.

    Calibration/testing system for non-invasive blood pressure monitoring system

  • Acoustics and Vibration Standards, CSIR-NPL has revived the testing of DG sets (Upto 1000KVA) for Type Approval (TA) and Conformity of Production (CoP) w.r.t noise parameter. In the revised Gazette notification (Regd. No. D. L. – 33004/99, part 2, section 3, Sub-Section (i), No. 52) of MoEF issued in January 2018, CSIR-NPL is designated as certification agency for DG sets testing TA and CoP for Noise Level Compliance of different types of DG sets run on Diesel, Petrol and natural Gas (NG) or Petrol and Liquid Petroleum gas (LPG), etc.
  • The Fluid Flow Metrology Section of NPLI has three facilities, namely, Primary Water Flow Calibration Facility, Primary Water Meter Testing Facility and Gas Flow Calibration Facility. The Section provides testing and calibration services of various types of water and gas flowmeters.
  • The Gas Flow Calibration Facility has been established in the flow range 1 mL/min to 1200 L/min with expanded uncertainty of 0.2% at k=2. The Gas Flow Calibration Facility is essentially consisted of laminar flow elements, sonic flow elements, high precision flow display device named as mass flow terminal, molstic for mounting laminar, sonic and device under calibrations along with associated instrumentation such as barometric pressure monitor and digital thermometer (PT-100 sensor with indicator). The air compressor system having 1000 L capacity air receiver and 1250 L/min flow range is used to supply dry air to the flow elements. There are five numbers of laminar flow elements (i.e. 10 sccm, 100 sccm, 1 slm, 10 slm and 30 slm) which cover the flow range of 0.8 sccm to 50 slm with operating pressure of 100 kPa absolute to 525 kPa absolute. There are three numbers of sonic nozzles (i.e. 2E2-S, 5E2-S and 2E3-S) which cover the flow range of 10 slm to 1200 slm with operating pressure of 50 kPa absolute to 600 kPa absolute which uses vacuum pump for realizing the flow below 30% of full scale (FS) rating of sonic nozzle. The laminar and sonic nozzle are known as molblocs in Fluke terminology. Each molbloc has 2 nos. of built-in PT-100 sensors. The molbloc has one EEPROM chip which stores information like flow range, calibration coefficients, different types of calibration, etc. The output of laminar and sonic nozzle is read by mass flow terminal. The mass flow terminal is a high precision display device which consists of two nos. of high precision absolute pressure sensors (reference pressure transducers) for reading the upstream and downst