本文介绍了小型系统中使用的四种主要控制选项:带有继电器/定时器逻辑的离散传感器（可以是压力开关、液位探头或类似设备）；具有电流跳闸、指轮等的模拟传感器（压力、具有连续可变输出的液位传感器）。；带有可编程逻辑控制器（PLC）或专用控制器的模拟传感器；以及基于计算机的SCADA。根据作者的说法，大型系统可用的所有控制能力都可以在小型系统中使用。 在一个小型系统中，一个特定的控制方案能否成功取决于许多因素，包括:用户舒适度；适用性；通讯；灵活性易用性；以及总体系统成本。

This paper relates four main control options for use in small systems: discrete sensors (can be pressure switches, level probes or similar devices) with relay/timer logic; analog sensors (pressure, level transducers with a continuously variable output) with current trips, thumbwheels, etc.; analog sensors with programmable logic controllers (PLCs) or dedicated controllers; and computer-based SCADA. According to the author, all of the control capabilities available to large systems can be used in a small system. Whether or not a particular control scheme will be successful in a small system depends on a number of things, including: user comfort level; serviceability; communications; flexibility; ease of use; and overall system cost.