IP67 Waterproof Ultra-Range Sensor 3-450cm for Water Level Measurement with Arduino and Raspberry Pi This ultrasonic ranging sensor is a non-contact distance measurement module with stable performance and high ranging accuracy featuring much smaller blind zone, wider sensing angle and a certain penetration power compared with other similar sensors. It can detect the distance between the ultrasonic wave and the target. Widely used in robot obstacle avoidance, parking management system, automatic control and so on. Average Current:Less than 8mA Response Time:100ms Detecting Range(Flat object):3-450cm Operating Temperature:-15-60℃ Reference Angle:60º Waterproof Grade:IP67 Measurement accuracy:±(1 + S*0.3%) Type:PWM pulse width/UART serial port/RS485 Colour:Black Material:Plastic Package Contents: 1 * Ultrasonic Ranging Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.