Water Quality Detector Circuit

Published:2011/7/20 3:18:00 Author:Joyce | Keyword: Water Quality , Detector | From:SeekIC

The water quality circuit is as shown in the figure: Water Quality Detector Circuit: When the detecting head has not been inserted into the water, if one presses AN, V1 will display that the impedance is high, V2 will break over and LED1 will be lightened. Once inserting the detecting head into 120mm deep under the water, the green light will still be on if the concentration of ions of harmful substance has not exceeded the standard. If not so, the impedance between detecting head H and L will become smaller. Then V1 will show low impedance, V2 will cut off, and LED1 will go out. At this time, LED1 will offer bias voltage to V3 which will break over afterwards. And LED2 will be lightened, indicating harmful substance in the water has exceeded the standard. RW is used to adjust the sensitivity.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Remote_Control_Circuit/Water_Quality_Detector_Circuit.html

Print this Page | Comments | Reading(3)