Personal and Professional Alcohol Tester: When the gas sensor cannot detect alcohol, the level of the fifth pin added to A is low. When the gas sensor detects alcohol, its internal resistance becomes low, so that the level of the fifth pin of A becomes high. A is the display pusher, which has 10 output terminals, and each output terminal can drive A light-emitting diode. The display pusher A determines the sequence of lighting the light-emitting diode according to the level of the 5th pin. The higher the alcohol content, the larger the sequence of lighting the secondary tube. The five leds above are red, indicating that they exceed the safe level. The following five leds are green, indicating a safe level of no more than 0.05% alcohol.
Read MoreSend InquiryDigital Wrist Blood Pressure Monitor: The circulatory system is the channel through which blood flows in the body. It is divided into two parts: the cardiovascular system and the lymphatic system. The lymphatic system is an auxiliary device of the venous system. The general circulatory system is the cardiovascular system.
Read MoreSend InquiryCE Approved urine drug test strips: A urine test is a medical test. Including routine urine analysis, urine visible components detection (such as urine red blood cells, white blood cells, etc.), protein components quantitative determination, urine enzyme determination, etc. Urine examination is very important for clinical diagnosis, curative effect and prognosis.
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