**Policy Summary: Mandatory Certification for Continuous Emission Monitoring Systems (CEMS) in Delhi-NCR**
Effective immediately, manufacturers of Continuous Emission Monitoring Systems (CEMS), both Indian and foreign, who have installed or plan to install CEMS for air emission monitoring in industrial stacks within the Delhi-NCR region, are required to obtain certification under the CSIR-NPL India Certification Scheme (NPLI-CS). This scheme is operative under the National Physical Laboratory (NPL). Details regarding the certification process are available on the NPL website: https://www.nplindia.in/wp-content/uploads/2025/08/Notification.pdf.
Manufacturers must submit a completed application form for Air Pollution Monitoring Equipment Product Certification under the NPLI-CS. Manufacturers possessing existing international certifications must include copies of these certificates, along with supporting documentation and test reports, with their application.
Fee details can be obtained by contacting the Centre for Calibration and Testing (CFCT) at cfct.nplindiacsir.res.in. Fees will vary depending on specific parameters and the certification status of the instruments.
All CEMS manufacturers are required to apply within one week of this notice, as previously communicated in a meeting held on August 20, 2025. Failure to comply may result in the prohibition of CEMS installation, operation, and connection to the Central Pollution Control Board (CPCB) central server.
Key Entities Referenced
Continuous Emission Monitoring Systems (CEMS): Equipment used for monitoring air emissions from industrial stacks.
NPL: An organization (likely National Physical Laboratory, based on the website domain) that has implemented a certification scheme for air emissions.
DelhiNCR: The National Capital Region of Delhi, India; a specific geographic area of concern for air emission monitoring.
Air Pollution Monitoring Equipment Product Certification: A certification program under CSIR NPL India Certification Scheme (NPLI CS) for CEMS equipment.
CSIR NPL India Certification Scheme (NPLI CS): The certification scheme operated by NPL for air pollution monitoring equipment.
Centre for calibration testing (cfct.nplindiacsir.res.in): A department within NPL responsible for calibration and testing, providing fee details for certification.
CPCB: Central Pollution Control Board. The CEMS must be compatible with the CPCB's central server.
Important Information for
Manufacturers of Continuous Emission (air) Monitoring Systems
Date: 03-September-2025
1. Certification scheme has been made operative by NPL for air emission. Details are available in
ANNOUNCEMENTS section of NPL website at URL:https://www.nplindia.in/wp-
content/uploads/2025/08/Notification.pdf
2. All the manufacturers of Continuous Emission Monitoring Systems
(CEMS), instrument/equipment (Indian/Foreign make), who have installed the same or planning to
install the same for monitoring of air emissions in stacks of industries in Delhi-NCR are required to
submit:
i. Duly filled-in application form for getting Air Pollution Monitoring Equipment Product
Certification under CSIR - NPL India Certification Scheme (NPLI CS) for their Continuous Emission
Monitoring Systems (CEMS) instrument/equipment.
ii. Manufacturers having Certifications from other International agencies for the product, details
submitted in the application form, have to submit copy of such certificates to NPL along with relevant
documents and reports on the basis of which the certificate has been issued such as Product conformity
certificate along-with Test report.
iii. Manufacturers are required to obtain fee details from Centre for calibration & testing
(cfct.nplindia@csir.res.in) through email. The fee will vary on case to case basis and depending on
parameters & certification status of instruments.
iv. All the CEMS manufacturers must apply within a week (as also informed in the earlier meeting
held with manufacturers on 20.08.2025) to NPL India failing which their CEMS may not be allowed
installation/operation and permission to get connected with Central Server of CPCB.