Gravity Non-contact Liquid Level Sensor
Description
- Gravity Non-contact Liquid Level Sensor
- XKC-Y25-T12V chip
- Gravity digital interface
- Utilizes advanced signal processing technology
- No contact with liquid makes the module suitable for hazardous applications
The Gravity Non-contact Liquid Level Sensor utilizes advanced signal processing technology by using a powerful chip (XKC-Y25-T12V) with high-speed operation capacity to achieve non-contact liquid level detection.
No contact with liquid makes the module suitable for hazardous applications such as detecting toxic substances, strong acid, strong alkali and all kinds of liquid in an airtight container under high pressure. There are no special requirements for the liquid or container and the sensor is easy to use and easy to install.
The Gravity Non-contact Liquid Level Sensor is equipped with an interface adapter that makes it compatible with DFRobot "Gravity" interface. Four levels of sensitivity can be configured by pressing the SET button.
Connection Diagram

- 1x Liquid Level Sensor Probe
- 1x Liquid Level Sensor Adapter
- 1x Gravity Digital 3-Pin Cable
- Works on non-metal surfaces (plastic, glass, or ceramics)
The sensor is good if you want to use it to sense the level of water for very thin surfaces. For instance, it will indicate water level in a cup. However, it does not work if the wall is thicker. It did not work for a 1/4 thick glass.
While the sensor and interface are intended for boards with a minimum 5v input (and 5v supply), input into a 3.3v board (eg. Arduino Due) can be done by powering the sensor with 5v and placing a 33KOhm resistor from the output to ground, which then forms a voltage divider with the internal 20KOhm resistor in the sensor module. Additional detail can be found in the discussion here: https://www.robotshop.com/forum/post-p128300#p128300
This liquid level sensor exceeded my expectations. I'm using it for wine level detection when bottling. What makes it outstanding is the fact that it is able to detect the level even though the neck of the bottle is not flat. And the customer service is outstanding, so I give it a rating of 5 out of 5.
This sensor works well for my project to detect when water level reaches the bottom of a tank in order to protect a submersible pump from running dry. I was concerned that the heavy plastic tank would be too thick, but seems to work perfectly.
Ce capteur fonctionne bien pour que mon projet détecte quand le niveau d'eau atteint le fond d'un réservoir afin de protéger une pompe immergée contre le fonctionnement à sec. Je craignais que le lourd réservoir en plastique soit trop épais, mais semble fonctionner parfaitement.
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
- Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".

