Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	KS104
Measurement Range	3 cm to 10 meters
Accuracy	±1 mm
Operating Voltage	3.3V - 5.5V DC
Interface Protocol	UART / PWM / I2C
Beam Angle	Approx. 15 degrees
Waterproof Rating	IP67
Operating Temperature	-20°C to +70°C
Dimensions	25mm x 45mm x 15mm
Weight	18 grams

6 reviews

Anonymous

Mar 22, 2026

Rating: 5/5

Superior to competitors

Compared to other ultrasonic modules in this price range, the KS104 has significantly less noise in the data stream. The multiple interface options make it versatile for different microcontrollers.

Anonymous

Mar 13, 2026

Rating: 5/5

Excellent precision for robotics projects

I used this sensor for an autonomous rover project and the accuracy is impressive. The waterproof casing held up well during outdoor testing in light rain. Setup with Arduino was straightforward using the UART interface.

Anonymous

Mar 13, 2026

Rating: 5/5

Reliable for industrial monitoring

We deployed ten of these units for tank level monitoring. They have been running continuously for three months without failure. The IP67 rating is genuine, and the data output is very stable.

Anonymous

Mar 06, 2026

Rating: 4/5

Good value for money

Integrated this into a smart parking assistant. It detects cars reliably even in dusty conditions. Deducting one star because the voltage regulator gets warm after prolonged use, but it hasn't affected performance.

Anonymous

Mar 05, 2026

Rating: 4/5

Great range, slightly bulky

The 10-meter range is accurate as advertised. It works perfectly for altitude hold on my custom drone. The only downside is it's a bit heavier than standard HC-SR04 modules, but the durability makes up for it.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for university thesis

Needed a sensor with better resolution than the cheap ones available locally. The KS104 delivered consistent millimeter-level readings. Documentation could be more detailed, but online forums helped.

5 FAQ

Q: Is a library available for ESP32?

A: While we do not host an official library, the community has created several open-source libraries for ESP32 that support the KS104 via UART and PWM. You can find them on GitHub by searching 'KS104 ESP32'.

Q: What is the minimum object size this sensor can detect?

A: Generally, the sensor can detect objects with a surface area larger than the transducer face (approx. 16mm diameter). Smaller objects may require direct perpendicular alignment for reliable detection.

Q: Can I connect multiple sensors to a single UART port?

A: Yes, you can connect multiple KS104 sensors to a single UART bus by configuring unique addresses for each module via the serial command set provided in the datasheet.

Q: Does this sensor work underwater or just resist water splashes?

A: The KS104 has an IP67 rating, meaning it can withstand temporary immersion in water up to 1 meter for 30 minutes. However, ultrasonic waves do not propagate well through water for air-based ranging, so it is designed for use in air while being protected from water exposure.

Q: Does the package include connecting wires?

A: The standard package includes the sensor module and a 5-pin connector header. Connecting wires are sold separately, but the pinout is clearly labeled on the PCB for easy soldering.

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