In order to reduce safety risks related to the field personnel and address the difficulties for deploying in-situ sensors, a novel ultralight wet chemical sensor was developed for the in-situ simultaneous determination of both phosphate and nitrite. The sensor only weighted 220 g and consumed 0.4 W average power, and achieved limit of detections (LODs) of 0.38 and 0.12 μmol/L for phosphate and nitrite, respectively. Moreover, a small experimental multi-rotor unmanned aerial vehicle (UAV) was also fabricated for employing the sensor for the in-situ detection in surface waters.

A dual-wavelength and dual-beam detection method that required fewer sensor parts was developed for the simultaneous detection of phosphate and nitrite. Bubbles cut from bubble wrap were used to store liquid reagents. A tandem sampling-reaction-detection cell that enabled merely by rubber bands was designed for avoiding the use of heavy pumps and valves. With these features, the complexity, size, weight and power consumption of the sensor were impressively reduced, hence rendering the sensor especially adaptive to the precious payload capability and battery power of the UAV.

To demonstrate the practicability, the developed sensor-UAV system was successfully applied in two water bodies. The UAV flew to the designed water area, then landed and floated on the water surface. The sensor was immersed into the water for in-situ detection, and previously established calibration curves were used for the quantification of the target analytes. The results were compatible with those obtained by the standard methods.

为了降低现场人员的安全风险并解决原位传感器部署的困难，开发了一种新型的超轻湿化学传感器，用于原位同时测定磷酸盐和亚硝酸盐。该传感器仅重 220 g，平均功耗为 0.4 W，磷酸盐和亚硝酸盐的检测限 (LOD) 分别为 0.38 和 0.12 μmol/L。此外，还制造了一种小型实验性多旋翼无人机（UAV），用于使用该传感器在地表水中进行原位检测。

开发了一种需要较少传感器部件的双波长和双光束检测方法，用于同时检测磷酸盐和亚硝酸盐。从气泡包装纸上切下的气泡用于储存液体试剂。仅通过橡皮筋启用的串联采样反应检测单元旨在避免使用重型泵和阀门。凭借这些特性，传感器的复杂性、尺寸、重量和功耗显着降低，从而使传感器特别适应无人机宝贵的有效载荷能力和电池电量。

为了证明实用性，开发的传感器-无人机系统在两个水体中成功应用。无人机飞到设计水域，然后降落并漂浮在水面上。将传感器浸入水中进行原位检测，并使用先前建立的校准曲线对目标分析物进行定量。结果与通过标准方法获得的结果一致。