Specifications: The AMT4409 is a latch-type Hall effect switch in a TO92S package. It operates across a wide 2.3-33V supply range, draws 4mA, and switches at precise 30 and -30 Gauss points for South and North magnetic poles, respectively. It is built for reliability from -30°C to 120°C. Application Scenarios: This switch is ideal for precise angular measurement and speed detection. It is commonly used in servo motor feedback systems, as a sensor in electronic throttles, for rotational speed sensing in conveyor belts, and in smart meters (water/gas) for detecting tampering or measuring flow via a rotating magnet, ensuring accurate and maintenance-free counting.