P4系列 PPS活塞式流量开关为注塑成型塑料结构，性能优异。固定设定点从0.1到1.5GPM来监测液体的流量。可选常开或常闭的单刀单掷或单刀双掷的全密封干簧管开关。采用了PPS R4工程塑料外壳和活塞，316不锈钢弹簧，氟橡胶O型环，环氧树脂保护等。 进出口采用9/16"-18 UNF- 2B螺纹，可选1/8"和1/4" NPT螺纹或1/2" 推紧式接头。

透明的P5系列 PVC流量开关有耐用防腐的PVC外壳，透明可视，可直接观察流体的状态。它可预设设定点从0.5到2.0GPM，当流量增高时动作。在没有流动的情况下是单刀单掷常开。可选1/2" NPT 或 3/4" IPS (for 0.5 GPM) 或 1" IPS (for 2.0 GPM) 进出口接口。只有一个移动部件的穿梭式设计便于维护，使用寿命长，只需移除一边，不需要拆卸接管和外壳就能清洗。它结构牢固，耐化学腐蚀性能好，用于监测流量的流动状态。

The Series AFS Adjustable Flow Switch is externally adjustable and is ideal for protecting machine tools from coolant flow failure, protecting bearings from loss of lubricant or assuring proper air flow. The Series AFS offers an infinite number of flow settings at pressures up to 1000 psig, with low pressure drop and precise repeatability. The AFS is housed in either brass or stainless steel and can be used with water, compatible liquids, oils, and gases.