The corona virus is spreading faster than ever before in India, so you should know the usefulness of the things that are significant to protect you against this epidemic, one of them is pulse oximeter. Now, what is pulse oximeter explains Khan sir. He says that Pulse oximeter has three things - saturated pulse oxygen which should be higher than 94, pulse rate should be between 60-90 and perfusion rate should be between 2-20. The pulse oximeter contains infrared rays that measures your oxygen level. Also, with the help of pulse oximeter, you can know whether the patients need to be hospitalized or not.