The principle of neutron level gauges　

One end has a neutron source while the other end has a receiver; the material in question blocks the passage of neutrons, allowing it to be determined how much material is present. This type of level gauge is generally used in the coke towers of coking units

The principle is the same as what was mentioned above; moreover, neutron level gauges emit radiation, and that radiation is quite intense! Be more careful in normal situations – the safety distance should always be >30 meters.

It operates on the same principle as nuclear level gauges (gamma-ray level gauges).

European electronic components are all lead-free; European mercury thermometers are also banned. What about neutrons? ,,, Amazing. According to the article, if you do this once a day, will all the tadpoles die? , According to what I’ve heard, if you expose it to light 3 times a day for 1 or 2 years, will the waterbird retract its neck and stop coming out of its nest? This thing is really terrifying…… Who knows who will be sacrificed that day.

I. Working Principle: This system uses a Pu238-Be neutron source with a activity of 20mCi to 50mCi. The average energy of the neutrons produced by the neutron source is 5.49 MeV. Fast neutrons emitted by the neutron source pass through the walls of the coke tower and undergo elastic collisions with hydrogen nuclei in the medium inside the tower. Fast neutrons become slow neutrons as their energy is transferred to hydrogen nuclei through elastic collisions; these slow neutrons are reflected toward the slow neutron detectors located outside the tower, where they are detected by those detectors. The receiver uses an efficient slow neutron detector (He3 proportional counter); when slow neutrons collide with the helium nuclei in the detector, charged alpha particles are generated. These charged particles move under the influence of an electric field, producing electrical pulses that result in pulse counting. The pulse count detected by the receiver is proportional to the slow neutron flux at the receiver (the number of neutrons passing through a unit area per unit time), and the density of hydrogen atoms in the material inside the tower is proportional to the slow neutron flux. Since the residue injected into the tower is mainly composed of carbon and hydrogen elements, the density of the material inside the tower can be determined from the slow neutron flux. The receivers at the lower, middle, and upper level detection points in the tower amplify and shape the received signals, which are then processed by PLC instruments. These PLC instruments convert the measured pulse counts into corresponding percentage density signals (with 4–20 mA corresponding to a density of 0–100%), and transmit these signals to the industrial computer. The industrial computer uses the trends in the density signals from the lower, middle, and upper detection points to determine the heights of gases, foam, coke, and water within the tower, thereby identifying the exact positions of various interfaces. It provides the percentage densities at each of the lower, middle, and upper detection points as well as indications of the positions of all interfaces within the tower, and sends the relevant data to the client.