What are the precautions of soil bulk density sampler?

before using the sampler for measuring soil bulk density, the sample should be obtained with a large diameter and length and a sampling depth of 2m. It is easier to drill into the soil with an impact hammer, and it is not difficult to take it out. The sample is in a relatively loose cylindrical cylinder, so it is very easy to take it out. Collecting one sample can study the whole soil profile, which saves time and reduces sample damage compared with excavating a sampling pit. The sampler for measuring soil bulk density can be effectively used for all types of soil. The standard impact method works in a slit mode, effectively capturing microbial aerosol particles of 1 micron or smaller, and the patented aerodynamic technology ensures that the collected bacteria particles do not overlap.

through the mutual conversion of electric field energy and magnetic field energy, the process oscillates freely, and an amplifier circuit with positive feedback is needed to maintain the oscillation. Because the parameters of the auxiliary devices can't be exactly the same, the states of the two auxiliary samplers change at the moment of power-on, and this change is more and more intense due to the positive feedback, which leads to a transient state. During the transient state, another auxiliary sampler is turned on or off after being gradually charged by the capacitor, and the state is reversed to reach another transient state. Therefore, the particle size range it collects is naturally wider than that of a single stage, which is unmatched by some single-stage soil bulk density samplers. The circular nozzle of the sampler for measuring soil bulk density has higher sampling efficiency than the slit equal nozzle. When sampling, the relative humidity increases step by step, which is very beneficial to fragile pathogenic microorganisms.