Specifications

SRF04 - Ultrasonic Range Finder.
Voltage - 5v only required
Current
- 30mA Typ. 50mA Max.
Frequency - 40KHz
Max Range - 3 m
Min Range - 3 cm
Sensitivity -
Detect 3cm diameter broom handle at > 2 m
Input Trigger - 10uS Min. TTL level pulse
Echo Pulse -
Positive TTL level signal, width proportional to range.
Small Size - 43mm x 20mm x 17mm height