Developing highly reliable, sensitive and room temperature operation hydrogen (H₂) sensors is essential to adapt successfully to the H₂ economy. Despite the development of various H₂ sensors, detecting leaks and pinpointing their precise location remains challenging because of the highly diffusive nature of H₂ and environmental factors such as the wind direction. This study reports the development of room temperature, wireless, dual-signal, wrappable, chemiresistive, and eye-readable gasochromic H₂ sensors using solution-based and low temperature annealed SnO₂/WO₃ films on polyimide substrate. These sensors can be wrapped around any point source, such as flanges, rendering the early detection and pinpointing of H₂ leaks. An optimized spray-coated gasochromic WO₃ film achieves a color change value (ΔE) of 11 with a 6 s response time at 4% H₂ and low eye detectable limit of 0.2%. Simultaneously, because a patterned spray-coated gasochromic layer does not interfere with the active area of a SnO₂-based chemiresistive sensor, the resistance value of the sensor changes by more than 11,000 times at 1% H₂ with a wide concentration range from 0.005% to 2% of H₂ at room temperature. Such a sensor can be easily applied to various nonplanar surfaces, while the Bluetooth system integration enables wireless monitoring via smartphones. Our study provides a simple strategy to develop wrappable dual-signal wireless sensors for reliable detection and monitoring of H₂ leaks at room temperature.

开发高度可靠、灵敏和室温操作的氢 (H _{2 ) 传感器对于成功适应 H 2}经济至关重要。尽管开发了各种 H ₂传感器，但由于 H ₂的高度扩散性和风向等环境因素，检测泄漏并精确定位其精确位置仍然具有挑战性。本研究报告了使用基于溶液和低温退火的 SnO ₂ /WO ₃的室温、无线、双信号、可包装、耐化学性和肉眼可读的气致变色 H _{2传感器的开发}聚酰亚胺基板上的薄膜。这些传感器可以缠绕在任何点源周围，例如法兰，从而实现 H ₂泄漏的早期检测和精确定位。优化的喷涂气致变色 WO _{3薄膜在 4% H 2}下的颜色变化值 (ΔE) 为 11，响应时间为 6 秒，眼睛可检测下限为 0.2%。同时，由于图案化喷涂气致变色层不会干扰基于 SnO _{2的化学电阻传感器的活性区域，因此传感器的电阻值在 1% H 2}和从 0.005 到 0.005 的宽浓度范围内变化超过 11,000 次% 至 2% 的 H ₂在室温下。这种传感器可以很容易地应用于各种非平面表面，而蓝牙系统集成可以通过智能手机进行无线监控。我们的研究提供了一种简单的策略来开发可包装的双信号无线传感器，以便在室温下可靠地检测和监测 H _2泄漏。