IISER Bhopal team develops affordable oxygen concentrator to meet demand during virus surge The device, which is estimated to cost less than Rs 20,000, can provide 93-95 percent pure oxygen with a flow rate of up to 3 litre/minute, they said. 0 claps Researchers at the Indian Institute of Science Education and Research (IISER) in Bhopal have developed an affordable oxygen concentrator to meet the high demand for medical oxygen amid a second wave of the coronavirus pandemic. The device, which is estimated to cost less than Rs 20,000, can provide 93-95 percent pure oxygen with a flow rate of up to 3 litre/minute, they said.