3.3-5.5V HC-SR04+ Ultrasonic Sensor 4pin

The 3.3-5.5V HC-SR04+ Ultrasonic Sensor is a 4-pin distance sensor module that works on any supply from 3.3 V to 5.5 V. Like the classic HC-SR04, it sends an ultrasonic pulse, listens for the echo and outputs a pulse whose width matches the travel time, giving non-contact measurements from about 2 cm to 4 m. The wide voltage range lets you use it with 3.3 V boards such as the ESP32, ESP8266 and Raspberry Pi Pico as well as 5 V Arduino boards.

3.3-5.5V HC-SR04+ Ultrasonic Sensor Specifications

• Operating voltage: 3.3 V to 5.5 V DC
• Measuring range: about 2 cm to 400 cm
• Measuring angle: under 15°
• Ultrasonic frequency: 40 kHz
• Trigger input: 10 µs HIGH pulse
• Echo output: pulse with a width proportional to distance
• Pins: VCC, Trig, Echo, GND
• Size: approx. 45 × 20 × 15 mm

3.3-5.5V HC-SR04+ Ultrasonic Sensor Applications

• Obstacle avoidance for robot cars
• Water tank level measurement from above
• Parking sensors and digital distance meters
• Presence detection in ESP32 IoT projects
• Arduino and STEM classes

What's in the Box

• 1 × HC-SR04+ ultrasonic sensor module

Tip: Power the sensor from the same voltage as your board's logic, 3.3 V for an ESP32 or 5 V for an Arduino Uno, so the Echo signal stays at a safe level for the input pin. Distance in cm is about the echo pulse time in µs divided by 58.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.