National Physical Laboratory of India
E31793
The National Physical Laboratory of India is the country’s premier national metrology institute, responsible for maintaining national measurement standards and providing high-precision time and frequency services.
All labels observed (4)
| Label | Occurrences |
|---|---|
| CSIR-NPL | 1 |
| CSIR-National Physical Laboratory | 1 |
| National Physical Laboratory of India canonical | 1 |
| national metrology institute of India | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T247376 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: National Physical Laboratory of India Context triple: [Indian Standard Time, coordinatedBy, National Physical Laboratory of India]
-
A.
Indian Space Research Organisation
The Indian Space Research Organisation (ISRO) is India’s national space agency, known for its cost-effective satellite launches, lunar and Mars missions, and growing role in global space collaboration.
-
B.
Cavendish Laboratory
Cavendish Laboratory is the University of Cambridge’s historic physics research center, renowned for groundbreaking discoveries such as the structure of DNA and the electron.
-
C.
Jantar Mantar, New Delhi
Jantar Mantar, New Delhi is an 18th-century astronomical observatory built by Maharaja Jai Singh II, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
-
D.
National Institute of Standards and Technology
The National Institute of Standards and Technology is a U.S. federal agency that develops and promotes measurement standards, technology, and innovation to enhance economic security and improve quality of life.
-
E.
Indian Museum
The Indian Museum in Kolkata is the oldest and largest multipurpose museum in India, renowned for its extensive collections of art, archaeology, anthropology, and natural history.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: National Physical Laboratory of India Target entity description: The National Physical Laboratory of India is the country’s premier national metrology institute, responsible for maintaining national measurement standards and providing high-precision time and frequency services.
-
A.
Indian Space Research Organisation
The Indian Space Research Organisation (ISRO) is India’s national space agency, known for its cost-effective satellite launches, lunar and Mars missions, and growing role in global space collaboration.
-
B.
Cavendish Laboratory
Cavendish Laboratory is the University of Cambridge’s historic physics research center, renowned for groundbreaking discoveries such as the structure of DNA and the electron.
-
C.
Jantar Mantar, New Delhi
Jantar Mantar, New Delhi is an 18th-century astronomical observatory built by Maharaja Jai Singh II, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
-
D.
National Institute of Standards and Technology
The National Institute of Standards and Technology is a U.S. federal agency that develops and promotes measurement standards, technology, and innovation to enhance economic security and improve quality of life.
-
E.
Indian Museum
The Indian Museum in Kolkata is the oldest and largest multipurpose museum in India, renowned for its extensive collections of art, archaeology, anthropology, and natural history.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
national metrology institute
ⓘ
research institute ⓘ |
| abbreviation | NPL ⓘ |
| affiliatedTo | Council of Scientific and Industrial Research ⓘ |
| alsoKnownAs |
National Physical Laboratory of India
ⓘ
surface form:
CSIR-NPL
|
| collaboratesWith |
International Bureau of Weights and Measures
ⓘ
surface form:
Bureau International des Poids et Mesures
other national metrology institutes ⓘ |
| contributesTo |
international system of units
ⓘ
mutual recognition of national measurement standards ⓘ |
| country | India ⓘ |
| establishedIn |
1947
ⓘ
20th century ⓘ |
| field |
materials science
ⓘ
metrology ⓘ physics ⓘ time and frequency standards ⓘ |
| foundedBy | Government of India ⓘ |
| governingBody | Council of Scientific and Industrial Research ⓘ |
| hasHeadquarters |
New Delhi, India
ⓘ
surface form:
New Delhi
|
| hasLaboratoryType | national standards laboratory ⓘ |
| hasMission |
to establish, maintain and improve national standards of measurements in India
ⓘ
to support Indian industry and strategic sectors through accurate measurements ⓘ |
| hasStandard |
Indian Standard Time
ⓘ
surface form:
Indian national time scale
national standard of amount of substance in India ⓘ national standard of electrical units in India ⓘ national standard of length in India ⓘ national standard of luminous intensity in India ⓘ national standard of mass in India ⓘ national standard of temperature in India ⓘ |
| jurisdiction | Government of India ⓘ |
| locatedIn |
Delhi
ⓘ
New Delhi, India ⓘ
surface form:
New Delhi
|
| operatedBy | Council of Scientific and Industrial Research ⓘ |
| parentOrganization | Council of Scientific and Industrial Research ⓘ |
| providesService |
calibration services
ⓘ
certification of standards ⓘ environmental monitoring measurements ⓘ testing services ⓘ time and frequency dissemination ⓘ |
| regionServed | India ⓘ |
| responsibility |
calibration and testing of measurement instruments
ⓘ
maintaining national measurement standards of India ⓘ providing high-precision time and frequency services in India ⓘ realization and dissemination of SI units in India ⓘ traceability of measurements to SI units ⓘ |
| sector | public research ⓘ |
| typeOfOrganization | government research laboratory ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: National Physical Laboratory of India Description of subject: The National Physical Laboratory of India is the country’s premier national metrology institute, responsible for maintaining national measurement standards and providing high-precision time and frequency services.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
CSIR-NPL
this entity surface form:
CSIR-National Physical Laboratory