This is the HC-SR04-33 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04-33 module includes an ultrasonic transmitter, a receiver and a control circuit.

There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!

This sensor has additional control circuitry that can prevent inconsistent "bouncy" data depending on the application.

NOTE: This version can be operated at both 3.3V and 5V. SEN-15569 only operates at 5V.

Note: This is the same ultrasonic sensor used with the XRP kits Beta & DIY

• Operating Voltage: 3.3V~5V DC
• Current: 15mA
• Frequency: 40Hz
• Max Range: 4m
• Min Range: 2cm
• Measuring Angle: 15°
• Trigger Input Signal: 10uS TTL pulse
• Echo Output Signal: Input TTL lever signal and the range in proportion
• Dimension: 45 x 20 x 15mm

• HC-SR04-33 Datasheet