The concept of park chairs equipped to detect fermium—a synthetic, radioactive element—sounds like science fiction, but it touches on real technological possibilities. Fermium (atomic number 100) is an element not found in nature; it is produced in nuclear reactors or during nuclear explosions and is highly radioactive. Its detection requires specialized radiation sensors, typically used in laboratories, security checkpoints, or hazardous environments.

Currently, there are no commercially available park chairs designed to detect fermium or any specific radioactive elements. Public infrastructure like benches focuses on practicality, sustainability, or smart features such as solar charging, Wi-Fi, or environmental monitoring (e.g., air quality). However, the idea isn't entirely far-fetched. With advancements in IoT and sensor technology, future "smart" benches could integrate radiation detection for public safety, especially in areas near nuclear facilities or in cities concerned with radiological threats.

Such chairs would need sophisticated sensors—perhaps miniaturized Geiger counters or spectrometers—capable of identifying specific isotopes like fermium-257, which has a half-life of about 100 days. They would also require connectivity to alert authorities to abnormal radiation levels. While this application is niche and poses challenges like cost, maintenance, and privacy, it highlights how public furniture could evolve beyond traditional uses.

In summary, while no park chairs today detect fermium, the convergence of safety technology and urban design might make this a reality in specialized contexts, blending innovation with public protection.