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Abstract—In aviation sector safety is a prime concern. Temperature sensitive items such as aircraft rubber equip-ment, aircraft Propellant Actuating Device (PAD) items (such as Fire Extinguishing Cartridges, Ejection Seat Car-tridges, Signal Cartridges etc.) are to be stored in controlled temperature in store houses. Storing of such valuable air-craft items in inappropriate temperature may affect their service life and the resultant serviceability of the aircraft. In this project, a system has been developed which will monitor the temperature in the storehouses and send a message to the concerned person when temperature crosses the maxi-mum storage temperature level. This circuit can be used to build a temperature based alarm system where an SMS will be sent or a buzzer will be turned ‘ON’, when temperature goes above a particular level. For implementing this project, GSM Module – SIM900, Atmega328p-pu microcontroller based Arduino Uno, LM35 temperature sensor, DHT22 humidity sensor have been used. The data from the sensors is processed and displayed on a LCD display. Code and al-gorithms are developed which enables combining all of the required sensors and innovations to provide data in a con-trolled manner in order to build the real time package. This device is portable and can be shifted easily by changing maximum setting temperature manually using push button switch. Thus, this system can be installed in different store-houses even in industries to monitor the temperature rising and give signal to the user to activate the temperature con-trolling system if required.