All the manufacturers are hereby informed that they are required to submit application form to CSIR-NPL for getting Air Pollution Monitoring Equipment Product Certification under CSIR - NPL lndia Certification Scheme (NPLI CS) for their Continuous Emission Monitoring Systems (CEMS) instrument/equipment on or before 15th September, 2025, failing which their CEMS may be derecognised for the purpose of CPCB's OCEMS portal. Please refer to the notice for more details.