Hydrocell 1 – Non refrigerated single bottle sampler. The USI Hydrocell range of water samplers are specifically designed for Composite Collection of (flow, event, or time proportional) samples of trade effluent discharges in industrial applications. A robust industrial design with state of the art touch screen programming and graphical display makes the Hydrocell the product of choice for all your waste water sampling needs. The Hydrocell waste water samplers have been designed with the trade effluent industry in mind and come supplied with 10 litre LDPE wide mouth bottles.