A
Anonymous
Mar 07, 2026
Rating: 5/5
Great value for money
Compared to other modules, this offers better precision at this price point.
Description
Includes STM32 Example Code – High-Precision Distance Measurement – Technical Support Provided
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | S21C |
| Operating Voltage | DC 3.3V - 5V |
| Measurement Range | 2cm - 400cm |
| Accuracy | ±1mm |
| Beam Angle | 15 degrees |
| Waterproof Rating | IP67 |
| Operating Temperature | -20°C to 70°C |
| Interface Type | UART / TTL |
| Dimensions | 45mm x 20mm x 15mm |
| Weight | 12g |
5 reviews
A
Anonymous
Feb 26, 2026
Rating: 4/5
Solid performance
Works well in daylight. Haven't tested extreme cold yet but seems robust.
A
Anonymous
Feb 25, 2026
Rating: 4/5
Good accuracy, minor wiring confusion
Sensor is accurate but the pinout diagram could be clearer. Once connected, it works great.
A
Anonymous
Feb 18, 2026
Rating: 5/5
Reliable obstacle avoidance
Using this on an autonomous rover. Detection is fast and consistent.
A
Anonymous
Jan 18, 2026
Rating: 5/5
Perfect for my robot project
Works exactly as described. Waterproofing held up well during outdoor tests.
5 FAQ
Q: Can it be submerged in water?
A: It is IP67 rated, so it withstands immersion up to 1 meter for 30 minutes, but continuous submersion is not recommended.
Q: What is the maximum detection distance?
A: The maximum reliable detection range is 400cm.
Q: Is this compatible with Arduino Uno?
A: Yes, it works with 5V logic boards like Arduino Uno.
Q: What is the response time?
A: The typical response time is under 50ms for standard measurements.
Q: Does it come with connecting wires?
A: Yes, a 20cm connector cable is included in the package.
