Homemade water quality discriminator ----- Water Discriminant Instrument

Homemade water quality discriminator, Water Discriminant Instrument Keywords: homemade water quality discriminator Homemade water quality discriminator Qualified daily water quality directly affects people's health. Water quality identification under amateur conditions, the professional sampling test and analysis cannot be adopted due to conditions, but can be directly detected by homemade an electronic device, which is intuitively displayed and discriminated and discriminated. Practical value. The detector circuit is shown in Figure 1. IC1 and peripheral components R1, R2, C1, and the like constitute a multi-resmium circuit. At the same time, there is a water quality probe head in the middle contact output of R3, and the LED "point" level display circuit composed of the probe right side connection IC2 is connected. Since the impurity content of water is inversely proportional to water, when the water quality is detected, if the water quality is good, the impurity content is small, and the hydrolyzate concentration of the impurity component in the corresponding water is low, so that the conductivity of this water is also low, then water resistance The value is large, and the oscillation signal has been large after the amount of attenuation after this water. Therefore, the level indicator exhibits a "LED" display within the "LED" display in the "low" LED1-LED3 in the range of the input signal amplitude. Conversely, the water quality is not good, the mass is large, and the oscillation signal "high level" is attenuated by the probe, input to the LED display, so that the display presents the LED4 ~ LED 6 range "LED" display, specifically to the LED The actual display meanings can be referred to in the table. When actually made, the probe portion can be made to the self-made according to FIG. A copper core guard line with a diameter of 4 mm2 is used on a lower body. The lower part is eliminated with a small knife, so that the copper wire is exposed to 10 mm. The upper pair of two-core shield lines (prevents external clutter interference). Thereafter, the joint is wrapped in the joint; the other end of the shield is connected to the measurement circuit. Simple model should be made after the circuit is installed. First, in the cup, it is installed as a test calibration source; put the probe in the cup inner water, then press the power switch S when it is adjusted. At this time, a LED in the indicator will illuminate, then slow adjustable resistance R3, in the illumination bit variation of the LEDL-6, the indicator is left in the position of the LED2 (green), and the calibration is adjusted.

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