Nasco的 COLIWASA液體廢品取樣器可以收集的取樣樣品類型包括：粘度的，有腐蝕性的，有波動性和固體形狀的樣品。該裝置可用于大部分的廢品樣本采集除含有酮，硝基苯，二甲基甲酰胺，異丙叉丙酮和四氫呋喃的液體廢品。而且其簡單的設計易于使用，并可以快速收集樣品，盡量減少廢品的收集樣本暴露于空氣的潛在危險。由高密度聚乙烯材料制成，設計符合環保局環保標準，COLIWASA廢品取樣器包括一個5英尺× 3 / 4“（1.53米x 1.9厘米）的編號管和截止閥。采樣器的規格為89ml/0.31m。不允許高溫高壓消毒。
用法：
1.推下頂部的支撐棒以關閉閥門；
2.把COLIWASA取樣器降低到一定高度，拉起支撐棒5-8cm打開閥門，收集樣品；
3.推下支撐棒關閉閥門，把取樣器從液體樣本中移出；
4.拉起支撐棒把樣品倒入一個合適的容器保存，或使閥門微微張開，同時吧取樣器淹沒到要取樣的液體中收集從表面到預定的水平高度的樣本。關閉閥門，從液體中移出，并將樣品放入空容器中。
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 approximay 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 approximay 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.