This low cost Ultrasonic Ranger allows you to detect the distance of an object between 1cm and 4m. Two operational modes are available, Single pin for trig/echo or 2 Pin SRF04 compatible. The input Trigger is a 10uS Min. TTL level pulse  Echo Pulse is Positive TTL level signal, with the width proportional to the object range.

• Range - 1cm to 4m.
• Power - 5v, 4mA Typ.
• Frequency - 40KHz.
• Size - 43mm x 20mm x 17mm height.

Full Technical Documentation