Description: A heat stress sensor is a device designed to monitor and measure thermal stress in environments, which involves assessing temperature and humidity conditions that can affect the health and well-being of living beings, as well as the performance of machinery and equipment. These sensors are fundamental in Internet of Things (IoT) applications, as they enable real-time data collection and transmission of information to centralized management systems. Heat stress sensors are typically equipped with advanced technology that allows them to detect subtle changes in environmental conditions, facilitating informed decision-making to mitigate risks. Their relevance lies in their ability to prevent damage, optimize processes, and improve quality of life in work and residential environments. Additionally, their integration into automated systems enables the creation of smart solutions that respond to variations in temperature and humidity, thus ensuring a safer and more efficient environment. These devices are increasingly common in sectors such as agriculture, construction, food industry, and healthcare, where controlling heat stress is crucial for the success of operations and the protection of human and material resources.