NTH is India's largest multi-location multidisciplinary industrial central government’s testing laboratory dealing with almost all sorts of testing, calibration and quality evaluation related to industry, commerce, trade etc. as per international and nations standards. At present National Test House is providing facilities like testing, evaluation and calibration of raw materials as well as finished products to the end users through its branches established at Kolkata, Mumbai, Chennai, Ghaziabad, Jaipur, Guwahati and Varanasi.