Batteryless Wireless Temperature/Humidity Sensor for Item-level Smart Pharma Packaging

In the Industry 4.0 era, pharmaceutical industries demands for technologies to guarantee for drug safety by moni- toring the environmental conditions to which the drug is exposed throughout the production and supply chain. This work proposes an item-level smart packaging solution based on RFID technology to measure wirelessly and without embedded battery source the temperature and relative humidity inside a pharmaceutical pill packaging. The designed 30 mm×20 mm flexible rH-T RFID probe can be read up to 20 cm in fully passive mode. The achieved sensing accuracy as measured in a climate chamber (±5% and ±1 °C) complies with the typical requirements of quality control standards and cold chain regulations.