Turbidity is used to measure the level of particles in liquids. It needs to be read and calculated by the analog port of single chip microcomputer. It needs turbidity calibration solution to calibrate. Instead of measuring the voltage directly with a multimeter, the output voltage of each module is different. The module should be used away from light. The light temperature and voltage will make the output voltage of the module different. 0-4.5 is only the reference voltage. Technical data: Voltage: 3.3-5v (with anti reverse circuit) Output: default analog (high and low level output can be set) Measurement range: 0-1000ntu https://elecena.pl/product/22627012/water-turbidity-detection-module-kit 2023-02-23 https://elecena.pl/product/22627012/water-turbidity-detection-module-kit 2025-10-28