1、The module realizes precise linear linearity adjustment, realizes high and low level and load-driven dual output, which is convenient for front-end acquisition and single-chip switching. 2、The module sensor can be connected to many sensors, such as: Resistive sensors: NTC type thermistor type temperature sensor, photoresistor type photosensor, vibration sensor, etc. 3、LM393 comparator chip, module input voltage is 5-28V, stable performance. 4、Made of high quality materials, this product is sturdy and durable. 5、This product is compact and lightweight, easy to install and convenient to use. 3 x LM393 Voltage Comparator Item Type: ModuleModule Input Voltage: 4.5-28VModule Size: Approx. 39.5 x 17mm / 1.6 x 0.7inComparator Chip: LM393 Comparator ChipUsage: The reference voltage is adjusted by the reference voltage adjustment potentiometer, and the voltage generated by the sensor and the voltage dividing resistor is compared with the reference voltage to achieve a high-low level comparison result output.