1. Temperature and Humidity Metrology, CSIR-National Physical Laboratory, Dr K. S. Krishnan Marg, New Delhi 110012, India
2. Academy of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
3. Sensor Devices and Metrology, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India