The measurement of physicochemical variables to infer water quality is important since they help determine the distribution and abundance of aquatic organisms or pollution-related problems. Recently, the development of low-cost probes is a suitable alternative for continuous monitoring of these variables rather than the use of expensive instruments. In this work, a low-cost multiparameter probe (LCMP) has been developed to monitor water quality in an estuary located in Northwestern Mexico during a 3-month period. The LCMP integrates different sensors to an Arduino Nano microcontroller allowing to measure electrical conductivity, dissolved oxygen, pH, salinity, water temperature, and tide level. Data files were stored in a data logger system consisting of a secure digital (SD) card module and a real-time clock module coupled to the Arduino microcontroller. To ensure continuous operation, the system was powered by four 3.7 V, 10,000 mAh rechargeable LiPo batteries. All LCMP components were encapsulated in a polyvinyl chloride pipe. The results show that the LCMP had a good agreement with a commercial-grade multiparameter probe and was able to monitor continuously in hourly time steps. Finally, the LCMP proved to be an alternative for the establishment of coastal observatories, which has been deficient due to limited funding.

测量理化变量以推断水质非常重要，因为它们有助于确定水生生物的分布和丰度或与污染有关的问题。最近，低成本探针的开发是连续监测这些变量而不是使用昂贵仪器的合适选择。在这项工作中，开发了一种低成本的多参数探头（LCMP），以监控位于墨西哥西北部河口的水质，历时3个月。LCMP将不同的传感器集成到Arduino Nano微控制器，从而可以测量电导率，溶解氧，pH，盐度，水温和潮汐水平。数据文件存储在数据记录器系统中，该系统由安全数字（SD）卡模块和耦合至Arduino微控制器的实时时钟模块组成。为确保连续运行，该系统由四节3.7 V，10,000 mAh可充电LiPo电池供电。所有LCMP组件均封装在聚氯乙烯管中。结果表明，LCMP与商业级多参数探头具有良好的一致性，并且能够以小时为单位连续监视。最后，LCMP被证明是建立沿海天文台的替代方案，由于资金有限，该方案已经不足。结果表明，LCMP与商业级多参数探头具有良好的一致性，并且能够以小时为单位连续监视。最后，LCMP被证明是建立沿海天文台的替代方案，由于资金有限，该方案已经不足。结果表明，LCMP与商业级多参数探头具有良好的一致性，并且能够以小时为单位连续监视。最后，LCMP被证明是建立沿海天文台的替代方案，由于资金有限，该方案已经不足。