The Waterproof Ultrasonic Distance Sensor A0221AU is a sealed measuring module that detects distance and liquid level by bouncing ultrasonic pulses off a surface. With a working range of 3-450 cm and a waterproof body, it suits humid and outdoor conditions where standard sensors fail. It is a practical choice for home gardeners, farmers, and makers building water-tank monitors, automated irrigation controllers, and DIY level-sensing projects.
Key features
- Waterproof housing built for damp, splash, and outdoor environments.
- Ultrasonic measuring range of 3-450 cm for both close and far targets.
- Model A0221AU, a compact module that mounts easily above tanks or surfaces.
- Non-contact sensing, so it does not corrode from sitting in water.
- Commonly compatible with microcontroller and automation projects.
Typical uses
- Monitoring water level in tanks, barrels, and reservoirs.
- Triggering pumps or valves in automated irrigation setups.
- Hydroponics and greenhouse level control.
- Distance and proximity sensing for hobby and project builds.
How to choose / tips
- Mount the sensor above the surface you want to measure, facing straight down for the most stable readings.
- Keep the sensor face clear of dirt and condensation buildup.
- Confirm the 3-450 cm range fits the depth of your tank before installing.
- Pair it with a controller suited to your pump or valve setup.
Why tna W rna
At tna W rna we focus on reliable sourcing and quality parts that hold up in real Egyptian conditions. Enjoy fast delivery across Egypt and the convenience of cash on delivery.
