Small static chamber for farmland greenhouse gas monitoring and sampling
A farmland greenhouse gas and static box technology, which is applied in the fields of agriculture, ecological environment and forestry, can solve the problems of uneven gas mixing in the box, difficult to seal the contact surface, and large volume of the static box, and achieves good in-situ observation in the field. Make up for the leakage of the sampling port and the effect of small volume
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[0028] see Figure 1-3 , in the figure, the small static box of the present invention, the contained box 1 is a cylindrical, integrally formed stainless steel box, without joints, and the bottom of the box is provided with a raised groove 2, which is used to wrap insulation cotton when the external temperature is low . The casing is equipped with a handle 10 simultaneously, which is convenient for moving and transporting.
[0029] The volume of the box is 1.2L (between 1.10 and 1.28L). Due to the small size of the box, there is no need to install a fan in the box, but a copper pipe with a length of 10.5 cm is inserted on the top of the box as the ventilation pipe 3, so that the pressure inside and outside the box is balanced. The diameter of the copper pipe in contact with the outside air is 3mm, and the diameter in the static box is 4mm. This copper pipe plays the role of properly balancing the internal and external atmospheric pressure after multiple pumping, and because ...
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