It is suitable for sampling of low-pressure liquid medium, quantitative and heating/cooling type. The high viscosity medium is sampled through the plunger valve. The medium fills the sample chamber first, and then the heating/cooling jacket controls the sample to the required temperature, and then the inert The gas purges the medium in the sample chamber and the needle assembly into the sampling bottle to ensure that a representative sample is obtained during the sampling process. The maximum operating pressure is 10 bar (145 psig)