Portable detector prototype for monitoring temperature, humidity, and ammonia gas in broiler chicken coops based on Arduino Nano

Environmental monitoring in broiler chicken houses is crucial for maintaining animal health, productivity, and welfare. Temperature, humidity, and ammonia gas are key parameters affecting poultry performance, with excessive ammonia levels posing serious risks to both chickens and farm workers. This study presents the design and implementation of an Arduino Nano-based portable detector to monitor these parameters in real-time. The device uses DHT22 sensors for temperature and humidity, and an MQ-137 sensor for ammonia gas detection. Data is processed by the Arduino Nano and displayed on an OLED display. Test results show that the temperature sensor achieved satisfactory accuracy with an average absolute error of 1.4°C, the humidity sensor exhibited variability with an average error of 3.7%, and the ammonia gas sensor showed the greatest limitations with an average absolute error of 3.9 ppm. This portable detector has proven to be effective, economical, and easy to use for monitoring environmental conditions in broiler houses. With real-time monitoring, farmers can maintain air quality, improve chicken welfare, and support productivity.