This performance of the ultrasonic sensor distance measuring module is stable、 measure the distance accurately. The module is with High precision、 blind spots (3cm) super close. This module provides a full set of ranging process.

- Model: HC-SR04
- Color: Blue + Silver
- Working voltage : 5V(DC)
- Static current: Less than 2mA.
- Output signal: Electric frequency signal、 high level 5V、 low level 0V.
- Sensor angle: Not more than 15 degrees.
- Detection distance: 2cm~450cm.
- High precision: Up to 3mm
- Mode of connection: VCC / trig(T) / echo(R) / GND
- Module Working Principle:
- Adopt IO trigger through supplying at least 10us sequence of high level signal
- The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal
- If there is signals returning、 through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving
Datasheet: http://m5.img.dxcdn.com/CDDriver/CD/sku.133696.pdf
Download Link: http://www.ic5188.com/PDF/HC-SR04.rar

- Color: Blue
- Material: Glass fiber
- Dual MOS tube achieve two way 3V and 5V level bidirectional conversion;
- Power input with counter-attack joint protection、 integrated 3.3 VLDO、 and can provide not more than 150mA current; with power indication light
- Can realize signals bidirectional conversion such as UART、 IIC、 1-wire、 etc.
- Comes with 2 x 4-Pin


Dimensions: 0.63 in x 0.39 in x 0.12 in (1.6 cm x 1.0 cm x 0.3 cm)
Weight: 0.18 oz (5 g)