Design and Implementation of Non-Contact Infrared Thermometer based MLX90614 and Ultrasonic Sensors

Inayatul Inayah, Heri Kiswanto, Achmad Dimyati, Muhammad Ghofinda Prasetia


Masurement of body temperature is essential to know the condition of the individual’s body. Temperature measurements need to be carried out without contact between individuals and devices or individuals with other individuals to prevent the transmission of Covid-19. In this study, a non-contact thermometer has been designed using an MLX90614 sensor to measure body temperature, and an HC-SR04 ultrasonic sensor to detect objects at 5-30 cm. The sensor reading results will be displayed via the TFT LCD in real-time. If the detected object temperature exceeds 37.5 oC, the buzzer will sound, and the LED will light up. The constructed thermometer is supplied by 12 V DC adapter to provide 5 V output to the microcontroller. Proximity sensor, temperature sensor, and TFT LCD work on 5 V DC voltage. A Resistor and a transistor were needed to turn on the LED and 12 V high decibel buzzer. This instrument has been tested and compared with a commercial thermometer AD801 model for measuring palms and forehead. Based on our study, the difference in palm and forehead temperature readings between the two thermometers in two individuals ranges from 0 to 0.2 oC. This reading error was still within the tolerance of the reading error listed on the MLX90614 sensor datasheet, which is ± 0.3 oC.


Non-contact thermometer; Infrared sensor; Ultrasonic sensor; Arduino mega

Full Text:



A. Abayomi-Alli, E. J. Etuk, P. I. Ezomo, F. A. Izilein, A. Y. Akingboye, and K. B. Erameh, ”A Microcontroller Based Digital Thermometer With Timer (Digithermo),” Int. J. Comput. Sci. Issue, vol. 10, no. 2, pp. 229238, 2013.

J. Zhang, ”Development of a Non-contact Infrared Thermometer,” in Proceedings of the 2017 International Conference Advanced Engineering and Technology Research (AETR 2017), Shenyang, China: Atlantis Press; 2018.

J. Chen, J. Wang, T. Shen, D. Xiong, and L. Guo, ”High Precision Infrared Temperature Measurement System Based on Distance Compensation,” ITM Web Conf., vol. 12, pp. 03021, 2017.

T. U. Urbach and Wildian, ”Rancang Bangun Sistem Monitoring dan Kontrol Temperatur Pemanasan Zat Cair Menggunakan Sensor Inframerah MLX90614,” Fis. Unand, vol. 8, no. 3, pp. 273280, 2019.

G. Jin, X. Zhang, W. Fan, Y. Liu, and P. He, ”Design of Non-Contact Infra-Red Thermometer Based on the Sensor of MLX90614,” Open Autom. Control Syst. J., vol. 7, pp. 8, 2015.

R. Sandra, V. Simbar, and A. Syahrin, ”Prototype Sistem Monitoring Temperatur Menggunakan Arduino Uno R3 Dengan Komunikasi Wireless,” J. Tek. Mesin, vol. 05, no. 4, pp. 48-53, 2016.

B. M. Jose, A. C. Treesa, M. Anand, S. Arjun, and A. Ramachandran, ”Design and Implementation of Digital Alarm,” Int. J. Adv. Res. Electr. Electron. Instrum. Eng., vol. 3, no. 2, pp. 76517653, 2014.

E. Toolbox, ”Emissivity Coefficients of some common Material,” 2015.

B.O. Akinloye, A.O. Onyan, and D.E. Oweibor, ”Design and Implementation of A Digital Thermometer With Clock,” Glob. J. Eng. Res., vol. 15, pp. 110, 2016.

M. Corporation, "MLX90614 DataSheet," 2019.

B. Arasada, ”Aplikasi Sensor Ultrasonik Untuk Deteksi Posisi Jarak Pada Ruang Menggunakan Arduino Uno,” J. Tek. Elektro, vol. 06, no. 02, pp. 137145, 2017.

F. Puspasari, I. Fahrurrozi, T. P. Satya, G. Setyawan, M. R. A. Fauzan, E. M. D. Admoko, ”Sensor Ultrasonik HCSR04 Berbasis Arduino Due untuk Sistem Monitoring Ketinggian,” J. Fis. dan Apl., vol. 15, no. 2, pp. 25, 2019.

A. Soni, A. Aman, ”Distance Measurement of an Object by using Ultrasonic Sensors with Arduino and GSM Module,” Int. J. Sci. Technol. Eng., vol. 4, no. 11, pp. 2328, 2018.

E. J. Morgan, "HC-SR04 DataSheet," 2014.

Robotshop, "Arduino Mega 2560 Datasheet," 2019.

I. Inayah, ”Analisis Akurasi Sistem Sensor IR MLX90614 dan Sensor Ultrasonik berbasis Arduino terhadap Termometer Standar,” J. Fis. Unand, vol. 10, no. 4, pp. 428434, 2021.



  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.