SKU: KSR504 Category:


The KSR504   REFLECTIVE ULTRASONIC DETECTOR Module offers non-contact detection of objects (or people) in the range 2cm to 400cm. It can also be used as a distance measuring device with an accuracy down to 3mm over its practical range. The module consists of an ultrasonic (40KHz) transmitter and a matching receiver with the necessary control circuitry.

The unit works, upon a command of 10uSec or more,  by sending a series of 8 pulses and “listening’ for any reflected pulse.  A detected signal may be treated as a simple “object in range” signal or can be compared with the timing of the transmitted signal to determine the distance to the detected object through the formula: Test Distance= High Level time x velocity of sound (340metres/second)/2.

The following connections are available to the user:  1. +5V Supply 2. Trigger Pulse Input 3. Echo Pulse Output and 4. Ground.

Power Supply: 5V
Quiestcent Current: <2mA
Effective Angle: <15degrees
Ranging Distance: 2cm – 500cm
Resolution: 0.3cm
Module Size 45mm x 20mm x 15mm.

Applications for the KSR504 include Robotic Sensors, Automation Barriers, Collision Avoidance, Gallery and Display Message Triggering, Distance Measuring, Security Detector (both interposing object or object missing detection)  Arduino users are finding a myriad of things to do with this economical subsystem.

Additional information

Weight .01 kg
Dimensions 4.5 × 2 × 1.5 cm