Nasco的 COLIWASA液体废品取样器可以收集的取样样品类型包括：粘度的，有腐蚀性的，有波动性和固体形状的样品。该装置可用于大部分的废品样本采集除含有酮，硝基苯，二甲基甲酰胺，异丙叉丙酮和四氢呋喃的液体废品。而且其简单的设计易于使用，并可以快速收集样品，尽量减少废品的收集样本暴露于空气的潜在危险。由高密度聚乙烯材料制成，设计符合环保局环保标准，COLIWASA废品取样器包括一个5英尺× 3 / 4“（1.53米x 1.9厘米）的编号管和截止阀。采样器的规格为89ml/0.31m。不允许高温高压消毒。
用法：
1.推下顶部的支撑棒以关闭阀门；
2.把COLIWASA取样器降低到一定高度，拉起支撑棒5-8cm打开阀门，收集样品；
3.推下支撑棒关闭阀门，把取样器从液体样本中移出；
4.拉起支撑棒把样品倒入一个合适的容器保存，或使阀门微微张开，同时吧取样器淹没到要取样的液体中收集从表面到预定的水平高度的样本。关闭阀门，从液体中移出，并将样品放入空容器中。

Nasco’s COLIWASA permits representative sampling of multiphase wastes for a wide range of viscosity, corrosivity, volatility, ａnd solids content. The unit can be used to sample most containerized liquid wastes, except those containing ketones, nitrobenzene, dimethylformamide, mesityl oxide, ａnd tetrahydrofuran. Its simple design is easy to use, ａnd allows the rapid collection of samples, minimizing the exposure of the sample collector to potential hazards from the wastes. Manufactured of high-density polyethylene ａnd designed to EPA standards, the COLIWASA consists of a 5 ft. x 3/4" （1.53 m x 1.9 cm） ID tube ａnd closing valve. Sampler holds approximately 3 oz. per foot. （89 ml per .31 m）. Not autoclavable.

To use:
1. Push down ａnd hold the rod at the top to close the valve.
2. Lower the COLIWASA to the proper level ａnd pull up on the rod approximately 2"-3" （5-8 cm） to open the valve ａnd collect the sample.
3. Push the rod down to close the valve ａnd remove the sampler from liquid.
4. Pull up on the rod to empty the sample into an appropriate container. Or hold the valve slightly open while submersing the COLIWASA into the liquid to collect the sample from the surface down to the desired level. Push the valve closed, remove from the liquid, ａnd empty into a container.