1、 Fully automatic oil pollution/oil particle size measuring instrument sensor and instrument working principle

When the sensor is working, the liquid sample flows through the injection glass slit from bottom to top due to the negative pressure siphon effect.

After the optical lens completes the collimation process of the laser beam, the beam is vertically incident on the middle of the sample glass slit, and then the beam passes through the horizontal detection slit and is projected onto the photodiode.

When no particles pass through the sample, the photodiode outputs a maximum constant photocurrent; When particles in the sample instantaneously pass through the beam area, they obstruct the beam, causing a decrease in the power of the light incident on the photodiode. At this time, the photodiode outputs a negative pulse current, the amplitude of which is proportional to the projected area of the particles in the direction of beam propagation.

The technology of detecting insoluble particles in liquid samples using photoresist method is based on the above principle.

2、 Working principle of fully automatic oil pollution/oil particle size measuring instrument

During the sampling phase, the three-way directional valve is switched to the sampling station, and the high-pressure injection pump starts running. The sample to be tested flows through the sampling needle and the injection slit.

The particles in the sample obstruct the beam emitted by the laser light source, causing the corresponding electrical signal to be generated at the photoelectric receiving end.

After the amplification and acquisition system processes the electrical signal, the particle size determination and quantity statistics are completed, and then the processing results are transmitted to the microcontroller.

The microcontroller is responsible for regulating the control system and controlling external devices such as display, printing, and keyboard.

After the sampling operation is completed, the three-way directional valve switches to the discharge station, and the high-pressure injection pump runs to discharge the tested sample into the waste liquid (backwash) cup.

In the backwash cleaning stage, the three-way steering valve maintains the drainage station status, the high-pressure injection pump starts, and the backwash liquid flows out from the waste liquid (backwash) cup to rinse the injection slit, in order to achieve the cleaning effect of the injection slit.

The following is an introduction to the independent research and development production of Sci Tech StarFully automatic oil contamination/oil particle size analyzerThe characteristics of the instrument are introduced as follows:

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Keywords of this article:XG618 Fully Automatic Oil Pollution/Oil Particle Size Tester，XG619 portable oil contamination/oil particle size analyzer，XG620 portable oil pollution/oil particle size tester，XG6201 portable oil pollution/oil particle size analyzer