SeeedStudio RS485 Ultrasonic Level Sensor, 750cm Range
Description
- SeeedStudio RS485 Ultrasonic Level Sensor
- Highly accurate with a measurement range of 28 to 750 cm
- Equipped with an IP67 waterproof ultrasonic transducer
- Features intelligent signal processing and on-board temperature compensation
- Energy efficient with an average current consumption of less than 10 mA
The SeeedStudio RS485 Ultrasonic Level Sensor, 750cm Range is a highly accurate ultrasonic distance sensor that can measure distances ranging from 28 to 750 cm. This sensor is versatile and can be utilized in a variety of applications including sewer and water level monitoring, intelligent waste bin management systems, robot avoidance, and automatic control systems.
The sensor employs ultrasonic sensing technology for distance measurement and is fitted with a bell-mouth, which extends the detection range up to 750 cm. The resolution of this sensor is impressive, with the ability to reach 1mm. The sensor is equipped with an IP67 waterproof ultrasonic transducer, which allows it to adapt to a variety of working conditions.

The sensor is designed with an intelligent signal processing circuit, a built-in high-precision ranging algorithm, and on-board temperature compensation. These features ensure accurate and reliable readings. The sensor is also energy efficient, with an average current consumption of less than 10 mA.
The sensor is equipped with the RS485 serial communications protocol, which simplifies the process of connecting and integrating it with other devices.
- 1x SeeedStudio Ultrasonic Level Sensor w/ RS485, 750cm Range

- Accuracy: ±(1+S*0.3%)
- Resolution: 1 mm
- Blind zone distance: 0~28 cm
- Measurement range (without bell-mouth): 28 ~ 450 cm
- Measurement range (with bell-mouth): 28 ~ 750 cm
- Beam angle (without bell-mouth): --
- Beam angle (with bell-mouth): ≈40°
- Operating voltage: 5~12 V
- Average current: <10 mA
- Output method: RS485 Output
- IP Rating: IP67
- Working Temperature: -15 ~ 60 °C
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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]".