Paper-based sensors prove an efficient and affordable way to monitor crop production and preservation

Measuring temperature and humidity in a variety of crop-growing circumstances has prompted the development of numerous sensors, but ensuring these devices are effective while remaining environmentally friendly and cost-effective is a challenge. Now, researchers at Auburn University in Alabama have developed paper-based temperature and humidity sensors that are accurate and reliable, as well as eco-friendly. The researchers created the sensors by printing silver lines on four types of commercially available paper through a process called dry additive nanomanufacturing. The sensors successfully detected changes in relative humidity levels from 20% to 90% and temperature variations from 25°C to 50°C.