Ultrasonic ranging module HC - SR04 provides a 2cm - 700cm non-contact measurement function, the ranging accuracy can reach 3mm.Ensured stable signal within 5m, gradually faded signal outside 5m till disappearing at 7m position.
The modules include ultrasonic transmitters, receivers, and control circuits. The basic principle of work:
(1) Using IO trigger for at least 10us high-level signal；
(2) The Module automatically sends eight 40 kHz and detects whether there is a pulse signal back.
(3) IF the signal back, through a high level, the time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time×velocity of sound (340M/S) / 2.
The Timing diagram is shown below. You only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo. The Echo is a distance object that is pulse width and the range in proportion. You can calculate the range through the time interval between sending trigger signal and receiving echo signal. Formula: uS / 58 = centimeters or uS / 148 =inch; or: the range = high level time * velocity (340M/S) / 2; we suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.
|700cm, Ensured stable signal within 5m, gradually faded signal outside 5m till disappearing at 7m position.|
|Trigger Input Signal||10uS TTL pulse|
|Echo Output Signal||Input TTL lever signal and the range in proportion|
- HC-SR04 V2.0 Ultrasonic Sensor x 2
1. Order processing times
All orders are processed within 24 hours after they are placed. Usually, we are able to ship orders the next day. Weekend orders are shipped on the following Monday. You will receive a shipping confirmation email from our system when the shipping information has been uploaded.
2. Free Shipping on ALL orders
Generally, we will ship the orders with Free Shipping, without the minimum order amount requirement. You may check if the free shipping method is available to your country in the Delivery Area below.
If you don't find your country in the delivery area, please reach out to firstname.lastname@example.org, our sales staff will contact you ASAP.
For distributors, please contact us at email@example.com for more shipment details.
NOTE: All the orders will be shipped from our China warehouse.
3. Delivery Area
Hong Kong SAR, Japan, Macao SAR, Malaysia, Philippines, Russia, Singapore, South Korea, Thailand, Vietnam, etc.
Austria, Belgium, Czechia, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Lithuania, Luxembourg, Monaco, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom, etc.
Australia, New Zealand
Canada, Mexico, United States
4. How do I track my order?
GOT A SUNFOUNDER ACCOUNT?
Easy Peasy! Log into your account through the online store, check out the fulfilment status against your recent order. If the order has been fulfilled, click onto the order information & you can find your tracking information here.
I DON'T HAVE AN ACCOUNT YET
As soon as your order is packed and shipped, you'll receive a shipping confirmation email. You will then be able to track your order through the tracking link on the email. If you haven't received an email yet, please reach out to us at firstname.lastname@example.org, our sales staff will contact you ASAP.
5. Shipping Method and Delivery Times
DHL(Orders Over $400)
UPS(Orders Over $400)
Delivery Time: 12-15 working days
You can track on https://www.17track.net/en
* Delivery Time - These are the delivery estimates provided by our shipping partners and apply from point of dispatch, not from point of sale. Once your parcel leaves our warehouse, we cannot control any delays after that point.
6. Customs & Import fees
Such as the products you buy on our site - can't simply be shipped freely from country to country. When goods are imported into a different country or customs territory, there is a charge called Customs Duty that must apply. This is charged by the local customs authority where the goods are being imported into.
If Customs Duty is payable to your territory, you'll be responsible for paying it to the authorities, so SunFounder isn't involved in this process. Whether Customs Duty is payable, and by how much, depends on a whole lot of different things. For example, many countries have a 'low value threshold' below which they do not charge any Customs Duty.
If you do have to pay Customs Duty though, the amount payable is usually calculated based on the value of the goods and the type of goods being imported.
AND IF I DON'T PAY THE CUSTOMS DUTY?
If, for whatever reason, you refuse the customs fee and the parcel is returned back to us. If you're still unsure on whether you'll be subject to customs fees, we recommend contacting your local customs office for more info before placing your order!
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.