A New Plastic Water Sampler
1954 Volume 5 Issue 1 Pages 95-96
Details
1954 Volume 5 Issue 1 Pages 95-96
The authors made a new plastic water sampler as shown in Fig.1. The cylindrical tube of the sampler is fitted with a stem mercury-in-glass thermometer, or a reversing thermometer if we want, in its inner side; and it has two nylon ropes, each 20 meters long, one of which is graduated in meters.
The instrument is lowered to the required depth head forward. Then the tube is at the upper end and the sampler is in the open position. It is allowed to remain there for about 3 or.5 minutes to permit the thermometer to reach the temperature of its surroundings, and as it is reversed by turning through 180 degrees by the other rope, the tube is slided down to the lower end of the sampler, and encloses a sample, to the amount of about 500 cc.
Then we can measure the water temperature by reading the thermometer through the tube, and the specific gravity by a hydrometer. And the water is sampled from a drain tube of rubber at the lower end of the instrument.
The heat conductivities of the new plastic sampler and the Kitahar's (a Petterson-Nansen type) were measured
