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

Anonymous

Mar 07, 2026

Rating: 5/5

Great value for money

Compared to other modules, this offers better precision at this price point.

Anonymous

Feb 26, 2026

Rating: 4/5

Solid performance

Works well in daylight. Haven't tested extreme cold yet but seems robust.

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.

Anonymous

Feb 18, 2026

Rating: 5/5

Reliable obstacle avoidance

Using this on an autonomous rover. Detection is fast and consistent.

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.

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