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Description
Description
This knock sensor module is designed to detect vibration and shock signals in various interactive electronic projects. It can be used in DIY electronics projects, knock-controlled lighting, home appliances, interactive sensing devices, smart homes, vibration detection devices, security alarm systems, etc. Suitable for electronics DIY enthusiasts and professional developer.
What will I get?
Model Number: KY-031
Material: PCB
Voltage: 5V
Temperature Resisting: -20-50
Size: 18 x 14 mm/0.71 x 0.55 inch(L*W)
Wire Length: 215 mm/8.46 inch
Package Content: 2 Pcs x Sensor Module, 6 Pcs x Male to Female Jumper Wire
Are there any advantages of the product?
The knocking sensor is encapsulated in a glass shell, resulting in a simple and compact structure that is easy to install and integrate into various physical structures. The KY-031 can more sensitively capture small-amplitude vibrations or strike signals, providing real-time detection and quickly converting physical signals into electrical signals to meet the need for rapid response.
Instruction
Easy to install, it features mounting bolt holes and a digital LED; the LED flashes when the strike sensor detects a strike signal. Solder the sensor pins to the circuit according to the circuit diagram. Please test the sensor response before use to confirm its trigger sensitivity.
What should I notice?
For purchasing electronic components, modules should have some basic knowledge of electronics. Most modules only provide descriptions or information. Beginners should be cautious.
This knock sensor module is designed to detect vibration and shock signals in various interactive electronic projects. It can be used in DIY electronics projects, knock-controlled lighting, home appliances, interactive sensing devices, smart homes, vibration detection devices, security alarm systems, etc. Suitable for electronics DIY enthusiasts and professional developer.
What will I get?
Model Number: KY-031
Material: PCB
Voltage: 5V
Temperature Resisting: -20-50
Size: 18 x 14 mm/0.71 x 0.55 inch(L*W)
Wire Length: 215 mm/8.46 inch
Package Content: 2 Pcs x Sensor Module, 6 Pcs x Male to Female Jumper Wire
Are there any advantages of the product?
The knocking sensor is encapsulated in a glass shell, resulting in a simple and compact structure that is easy to install and integrate into various physical structures. The KY-031 can more sensitively capture small-amplitude vibrations or strike signals, providing real-time detection and quickly converting physical signals into electrical signals to meet the need for rapid response.
Instruction
Easy to install, it features mounting bolt holes and a digital LED; the LED flashes when the strike sensor detects a strike signal. Solder the sensor pins to the circuit according to the circuit diagram. Please test the sensor response before use to confirm its trigger sensitivity.
What should I notice?
For purchasing electronic components, modules should have some basic knowledge of electronics. Most modules only provide descriptions or information. Beginners should be cautious.
1. General Return Policy
At HARFINGTON, we stand by our commitment to effortless shopping and straightforward returns. While we strive to meet your expectations every time, we understand that needs can change. That’s why we’ve made the return process as simple and convenient as possible.Once your inquiry or request is received, our dedicated customer support team will review the details and process your case within 1–2 business days.
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United States |
Europe |
Other Regions |
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Return Window |
30days |
30days |
30days |
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Free Return Eligibility |
≤USD30 |
≤EUR30 |
≤USD30 |
2. Return Process
Other Regions Return Process
Except for statutory EU/EEA withdrawal requests processed via the website, all global returns must be coordinated and authorized directly via email:
● Contact Us: Email our Customer Service team at [email protected] with your proof of purchase (Order Number) and the reason for the return.
● Get Authorization: Our team will review your email and reply with the correct warehouse destination address for your return package. Note: Do not ship items back to the original shipping address listed on the package exterior.
● Processing & Refund: It takes 1–3 business days for our warehouse to scan, physically inspect, and process your return after receiving the items. Once the refund is issued, it typically takes 5–10 business days for your banking institution to reflect the credit on your statement.
EU/EEA Customers Return Process
For consumers resident in the EU/EEA, you have a statutory 14-day right to withdraw from your purchase without giving any reason. As part of our commitment to excellent service, we extend this return period to 30 days, starting from the day you receive the goods.● How to Exercise: Send a clear withdrawal declaration to [email protected] before the 30-day period expires. You may also submit your withdrawal request directly via the return button on your order detail page, which will trigger an automated confirmation email.
● Value Loss: You are only liable for diminished value of the goods if the loss results from handling beyond what is necessary to inspect the product’s condition, characteristics, and functionality.
3. Standard Product Return Requirements & Fraud Prevention
To qualify for a refund, all returned items must pass our strict warehouse inspection. Any signs of fraud will immediately void the refund. All returns must include:
● Original packaging (including original box, plastic foam, bubble wrap, bags, etc.).
● Original intact UPC barcode. Removal or defacement of the UPC code voids any possibility of the return request being honored.
● All accessories (cords, cases, transformers, parts, batteries, assembly tools, etc.).
● All documentation (manufacturer instruction manuals, warranty cards, and other documents).
● Condition Verification: Items must be in brand-new, uninstalled, and resalable condition. Any items showing signs of installation, tool marks, grease, operational wear, or the return of used/old auto parts (swapped items) will be strictly rejected for a refund and disposed of automatically.
4. Return Policy Exceptions & Limitations
1. Free Return Limit: Return shipping is complimentary only for the first return instance per individual order where applicable.
2. Additional Returns: If you wish to make subsequent returns from the same order, you can request an additional label, and a $5.99 shipping fee will be deducted from your final refund.
3. High-Value Orders: For orders above $30 or orders outside the United States, HARFINGTON is not responsible for the return shipping fee; you must ship via your own method and at your own cost.
4. Fulfillment Center Assessment: Refunds are strictly contingent upon physical verification of the package contents and shipping weight. If our warehouse detects that returned items are worn, damaged, missing components, or do not match the original product's weight (empty box fraud), HARFINGTON reserves the right to cancel the refund.
5. Defective or Wrong Items: If you receive an item that is wrong, defective, or broken, please report it within 30 days of receipt. HARFINGTON will exchange it for a new item or issue a 100% full refund.
6. Vehicle Compatibility & Fitment Responsibility: Customers are solely responsible for verifying vehicle compatibility before purchasing. If an item does not fit because the customer bypassed our vehicle selection tools or purchased the wrong part for their specific vehicle configuration, the return will be classified as a Non-Quality Issue (Personal Reason).
7. Bundles & Promotional Kits: Items purchased as part of a bundle, promotional kit, or buy-one-get-one offer must be returned in their entirety. For approved partial returns, the refund amount will be recalculated by deducting the full retail price of the retained item(s) from the total bundle price.
8. Non-Returnable Items: Select products(Customized products, clearance products, etc.) are excluded from the 30-day unconditional return policy. These products will be explicitly tagged on their respective detail pages and within your order details.
9. Larger Items: Certain large or heavy items require specialized freight handling. If you wish to return a larger item, please contact Customer Service via email in advance for specific instructions.
10. Non-Quality Issues: For returns initiated due to personal reasons (e.g., changing mind, buyer's remorse, wrong fitment selection), the customer is fully responsible for paying the return shipping fees and any customs duties, import fees, or original shipping costs incurred.
11. Wholesale & Custom Orders: Free returns and refunds are not supported for wholesale or custom-made orders. Additionally, certain approved wholesale returns may be subject to a 30%–50% restocking fee. (Wholesale orders are orders that qualify for wholesale discounts)
5. Warranty
Unless explicitly marked otherwise for select products that carry a 2–3 year warranty, all eligible HARFINGTON products are backed by a standard 365-day warranty starting from the date of delivery.
This warranty covers manufacturing defects under normal and intended use. If your item is confirmed to be defective within this period, we will gladly provide a new replacement or issue a full refund. This warranty does not cover damages resulting from improper DIY installation, vehicle accidents, racing, normal wear, or neglectful maintenance.
6. Contact Us
If you have any questions or issues regarding your return, warranty claim, or refund status, please contact our Customer Service team at [email protected]. We are always happy to help!
