BoSL FAL Pump

Water sampling is an essential undertaking for water utilities and agencies to protect and enhance our natural resources. The high variability in water quality, however, often necessitates a spatially distributed sampling program which is impeded by high-cost and large sampling devices. This paper presents the BoSL FAL Pump - a low-cost, easily constructed, 3D-printed peristaltic pump which can be made from commonly available components and is sized to suit even the most space constrained installations. The pump is 38mm in height and 28mm in diameter, its components cost $16 AUD and the construction time is just 12 minutes (excluding 3D printing times). The pump is driven by a direct current motor which is commonly available, cheap and allows for flexibility in the energy supply (5-12 V). Optionally, the pump has a Hall effect sensor and magnet to detect rotation rates and pumping volumes to improve the accuracy of pumping rates/volumes. The pump can be easily controlled by commonly available microcontrollers, as demonstrated by this paper which implements the ATmega328P on the Arduino Uno R3. This paper validates the pump for long-term deployments at flow rates of up to 13mL per minute in 0.14mL volume increments at accuracy levels of greater than 99%. The pump itself is scalable, allowing for a wider range of pumping rates when, for example, large volume samples are required for pathogen and micropollutant detection.水样采集是水务机构与企业用以保护并优化自然资源的关键任务。然而，水质的高度变异性往往需要采用空间分布式采样方案，但此类方案常因采样设备成本高昂、体积庞大而难以落地实施。本研究介绍了BoSL FAL泵——一款低成本、易组装的3D打印蠕动泵（peristaltic pump），其可通过通用现成组件制造，尺寸适配绝大多数空间受限的安装场景。该泵高度为38mm，直径28mm，组件成本仅16澳元，组装耗时仅12分钟（不含3D打印时长）。该泵采用通用廉价的直流电机（direct current motor）驱动，可兼容5-12V的多种供电方案，供电灵活性极佳。该泵可选配霍尔效应传感器（Hall effect sensor）与磁铁，用以检测转速与泵送体积，从而提升泵送速率与体积的计量精度。该泵可通过通用微控制器（microcontrollers）轻松实现控制，本研究即通过Arduino Uno R3搭载ATmega328P完成了相关验证。本研究验证了该泵可在长期部署场景下稳定工作，其最大流速可达13mL/分钟，单次泵送体积增量为0.14mL，计量精度超过99%。该泵具备可扩展性，当需要采集大体积样本以开展病原体与微污染物检测等场景时，可实现更广范围的流速调节。