4PCS HC-SR04 Ultrasonic Distance Sensor Modules with Brackets

Key features

• Accurate Non-Contact MeasurementMeasures distance from 2–400 cm with typical accuracy up to ±3 mm. Uses 40 kHz ultrasonic sound waves for stable and precise detection without physical contact.
• Complete 4-Pack KitIncludes 4 HC-SR04 sensor modules, 4 mounting brackets, 4 screw sets, jumper wires (male-to-female & female-to-female), and a reusable storage case for easy organization.
• Simple Integration & ControlStandard 4-pin interface with 10 μs TTL trigger input and echo output. Compatible with common 5V and 3.3V microcontroller boards (level shifting may be required).
• Low Power & Reliable PerformanceOperates at DC 5V with approx. 15 mA current. Stable output with approx. 15° beam angle, suitable for continuous real-time distance tracking.
• Wide ApplicationsIdeal for robotics, obstacle avoidance, parking assist, liquid level detection, object measurement, and STEM/educational projects. Note: This product uses ultrasonic sound waves and does not emit radio frequency (RF) signals.

The HC-SR04 ultrasonic distance sensor module is a reliable and easy-to-use solution for non-contact distance measurement in robotics and automation projects. Using 40 kHz ultrasonic sound waves, the module accurately measures distances from 2 cm to 400 cm with typical precision up to ±3 mm. It integrates both transmitter and receiver functions, making it compact and efficient for embedded systems. The module operates on a simple principle: a 10 μs trigger pulse initiates measurement, after which the sensor emits ultrasonic waves and listens for the reflected signal. The duration of the returned echo pulse corresponds directly to the measured distance. Designed for compatibility, the standard 4-pin interface (VCC, TRIG, ECHO, GND) allows seamless integration with common microcontrollers, including Arduino-compatible boards. It supports both 5V and 3.3V systems (with appropriate level shifting if required). With low power consumption (approx. 15 mA) and a focused beam angle of approximately 15 degrees, the HC-SR04 is suitable for continuous, real-time detection tasks. This complete kit includes mounting brackets, screws, jumper wires, and a reusable storage case, making it ideal for

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