Nanoceramic Powder Based Thermometer for Basal Body Temperature Monitoring System to Estimate Ovulation

In this paper, Basal body temperature (BBT) monitoring IoT enabled system is designed and developed using a nanomaterial based thermistor. BBT is the lowest body temperature attained at rest and normally ranges from 96°F to 99.5°F. The NiMn 2 O 4 nanoceramic powder based thermistor is used as a temperature sensor which is fabricated by synthesizing NiMn 2 O 4 nanomaterial powder by the modified wet chemical method. This nanomaterial powder is pressed in an insulated cylindrical tube with aluminum electrodes. The average crystallite size of the NiMn 2 O 4 was found to be 26.8nm from the XRD characterization. The calibration of the sensor was performed by using thin film heater, combination of LM35 and fabricated thermistor with Atmega328 microcontroller. The system so developed effectively measures the BBT at axillary (armpit) with precision more than three digits. Further this system is IoT facilitated using ThingSpeak IoT platform in order to privilege real time monitoring. Analysis of the biphasic temperature pattern of the obtained BBT graph is more convenient to predict ovulation period in women accurately. This information is helpful in enhancing the effectiveness of Natural Family Planning (NFP) to achieve or avoid pregnancy naturally.