Introduction: Controlling and monitoring accurate and reliable temperature measurements are necessary in various fields such as industrial, environmental, agricultural, food, biotechnology and clinical etc. Furthermore, research laboratories, clean rooms and nuclear reactors are environments that require continuous temperature monitoring due to their high dependence on temperature levels. The role of sensors and errors that can affect temperature measurement are critical to temperature measurement devices. The choice of sensor can play an important role in the cost-effectiveness of the system. Each temperature measurement application conforms to different requirements and the effect of noise on resolution must be considered. Noise issues and the presence of errors are more critical from the point of view of sensor design and type selection. Different ways of measuring temperature are available such as resistance temperature detectors, integrated circuit sensors, infrared sensors, liquid and gas thermometers, gas thermometers, thermocouples, thermostats, thermostats etc. In this report, the integrated circuit using the temperature sensing method of LM35 temperature sensor is described because of the important advantages over other types of sensors such as low cost, high precision, linear output signal, small size, calibration, reliability and low energy consumption. Literature Review: Types of Temperature Sensors: The most commonly used type of temperature sensors detect heat or temperature. These types of temperature sensors range from simple thermostat devices, used to control the home water heating system, to highly sensitive semiconductor types used to monitor and control the compl...... medium of paper.... .genetic regions.Thermometers: These are liquid expansion devices for measuring temperature. The liquid can be mercury or alcohol. The expansion coefficient of alcohol is greater. Your Mercury device has some limitations for safe transportation and shipping. Mercury is considered an environmental contaminant, so breaking the thermometer is dangerous. Infrared Sensors: Infrared sensors are non-contact types. For example, if we hold a typical infrared sensor in front of our non-contact desk, the sensor will tell us the temperature of the desk due to its radiation... in the non-contact measurement of ice water, it will measure slightly lower than the expected temperature reading [2].Bibliography[1] [Online]. Available: http://www.electronics-tutorials.ws/io/io_3.html.[2] [Online]. Available: http://www.wwdmag.com/water/seven-basic-types-temperature-sensors.