Complete Guide for Ultrasonic Sensor HC-SR04

- Sep 25, 2018-


The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package.

From 2cm to 400 cm or 1” to 13 feet. Its operation is not affected by sunlight or black material like sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). It comes complete with ultrasonic transmitter and receiver module.


Power Supply :+5V DC

Quiescent Current : <2mA

Working Current: 15mA

Effectual Angle: <15°

Ranging Distance : 2cm – 400 cm/1″ – 13ft

Resolution : 0.3 cm

Measuring Angle: 30 degree

Trigger Input Pulse width: 10uS

Dimension: 45mm x 20mm x 15mm

How Does it Work?

The ultrasonic sensor uses sonar to determine the distance to an object. Here's what happens:

The transmitter (trig pin) sends a signal: a high-frequency sound.

When the signal finds an object, it is reflected and…

… the transmitter (echo pin) receives it.


View more module on Kuongshun Electronics company.

 Ultrasonic Module HC - SR04 Distance Measuring Transducer Sensor

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