Item Description:
Item FeaturesHC-SR04 ultrasonic module can offer non-contact distance sensing function， the range of which is 2cm—400cm.， and the range accuracy is up to 2mm; the module includes ultrasonic transmitter， receiver and control circuit.
Working Voltage : 5VDC
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-500cm.
High precision: Up to 0.3cm
Input trigger signal: 10us TTL impulse
For Echo signal : output TTL PWM signal
The basic operation principle is below:
(1)use IO port TRIG to trigger ranging. It needs 10 us high level signal at least
(2)Module can send 8 pro 40 kz square wave automatically， and will test if there is any signal returned.
(3)If there is signal returned， output one high level signal via IO port for ECHO. The duration of the high level signal is the time from transmitter to receiving with the ultrasonic.
Testing distance =duration of high level*voice velocity(340m/s) / 2
Note:
1. for this module， keep in mind not to connect with electricity. If it is connected with electricity， you need to connect up the GND port of the module firstly， otherwise it will affect the normal working of the module.
2. When testing， the coverage of the tested object is 0.5 square meter or below， and try to make the plate smoothly.， otherwise， it will affect the result of the testing.
Package Included
1x Distance sensor
Item Pictures:
Payment:
1) We accept Alipay， West Union， TT. All major credit cards are accepted through secure payment processor ESCROW.
2) Payment must be made within 3 days of order.
3) If you can\'t checkout immediately after auction close， please wait for a few minutes and retry Payments must be completed within 3 days.
Related Products:
Shippment:
| Country | Delivery Time | ||||||
| Working Days (not including holiday) | 5-7 | 8-11 | 12-14 | 15-19 | 20-22 | ||
| Working Days + Saturday + Sunday | 5-9 | 10-15 | 16-20 | 21-25 | 26-30 | ||
| United States | Rate (Item Arrived) | 5. 1% | 50. 1% | 29. 6% | 10. 5% | 4. 7% | |
| United Kingdom | Rate (Item Arrived) | 9.9% | 63.2% | 19.1% | 3.4% | 4.4% | |
| Australia | Rate (Item Arrived) | 21. 4% | 50. 0% | 14. 3% | 7. 2% | 7. 1% | |
| France | Rate (Item Arrived) | 10. 5% | 28. 6% | 43. 8% | 10. 1% | 7. 0% | |
| Germany | Rate (Item Arrived) | 11. 1% | 22. 2% | 30. 3% | 20. 9% | 15. 5% | |
| Canada | Rate (Item Arrived) | 0. 0% | 47. 1% | 31. 4% | 17. 6% | 3. 9% | |
| Spain | Rate (Item Arrived) | 3. 5% | 25. 0% | 47. 9% | 12. 9% | 10. 7% | |
Item are shipped within 3 business days once full payment is settled. If you can\'t get your items in time， please contact to us first， we wil check and solve it for you soon. We will reply your mail within 24 hours normally. sometimes have a little delay due to the weekend or holiday. If you can\'t get our mail after 48 hours， please check your spam or contact to us with other mail address.
Return & Warranty:
Return:
If item DOA(Dead of Arrival)， Buyers Can return it in 14 Days， We will Replace it with New item after we receive DOA item. Please Contact us Before you sent the item back.
Warranty:
All item Comes with Basic 3 Month Sellers Warranty， if item defective in 3 Month， We will offer replacement without extra Charger(including shipping fee)After we Receive the Defective item.
If item Defective after 3 Month， Buyers can still send it back， We will contact suppliers or Manufactory for Warranty. Buyers Might Need to pay the Shipping fee For resend the replaced item.
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