Abstract: Vital signs are measurements of the bodys most basic functions. The four main vital signs routinely monitored by medical professionals and healthcare providers include the following body temperature, pulse rate, respiration rate (rate of breathing), blood pressure (Blood pressure is not considered a vital sign, but is often measured along with the vital signs.) Vital signs are useful in detecting or monitoring medical problems. Vital signs can be measured in a medical setting, at home, at the site of a medical emergency, or elsewhere. This paper aims at measurement of respiration rate using digital sensor extending the methods of measuring it with help of thermistor, chest expansion etc. The respiration rate is measured with the help of TMP100 a Digital temperature sensor which monitor the slightest change in temperature during inhale & exhale. Wireless GSM MODEM, which is serially interfaced with microcontroller, sends the collected data to the physician. The theory, design procedures, experimental results and discussions of these systems are presented.