Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	DS18B20
Measurement Range	-55°C to +125°C
Accuracy	±0.5°C (from -10°C to +85°C)
Interface Protocol	1-Wire Digital
Cable Length	1 Meter
Probe Material	Stainless Steel 304
Waterproof Rating	IP68
Supply Voltage	3.0V to 5.5V
Resolution	9 to 12-bit configurable
Application	Aquariums, Hydroponics, HVAC

6 reviews

Anonymous

Mar 26, 2026

Rating: 5/5

Great for learning projects

As a student working on an IoT project, this sensor was easy to integrate. The 1-wire protocol saves GPIO pins, and there are plenty of libraries available online to get started quickly.

Anonymous

Mar 24, 2026

Rating: 5/5

Reliable for fermentation monitoring

I use this to track temperatures during beer fermentation. The stainless steel probe is easy to sanitize, and the digital signal prevents interference from my other equipment. Highly recommended for home brewers.

Anonymous

Mar 22, 2026

Rating: 4/5

Good value, accurate readings

Bought this to monitor my reef tank temperature. It connects easily to my ESP32 board. The only reason for 4 stars instead of 5 is that the cable is a bit stiff, but performance-wise, it is excellent.

Anonymous

Mar 20, 2026

Rating: 5/5

Exactly as described

Fast shipping and the product matches the description perfectly. The sealing on the probe looks very professional. I am using it to trigger a fan when my server room gets too hot.

Anonymous

Mar 09, 2026

Rating: 5/5

Perfect for my hydroponic setup

This sensor works flawlessly with my Arduino controller. The waterproofing is genuine, and I've had it submerged in my nutrient tank for three weeks without any issues. Readings are consistent and match my calibrated thermometer.

Anonymous

Mar 07, 2026

Rating: 4/5

Holds up well outdoors

Installed this in a small outdoor pond. It has survived rain and direct sunlight without degradation. The temperature data helps me know when to adjust the heater. Solid build quality.

5 FAQ

Q: Does it come with a pull-up resistor?

A: The sensor module itself does not include an external pull-up resistor. For proper operation on the 1-Wire bus, you typically need to add a 4.7kΩ resistor between the VCC and Data lines in your circuit.

Q: Is the stainless steel probe food safe?

A: The probe is made of 304 Stainless Steel, which is commonly used in food and beverage applications. However, for direct contact with consumables, please ensure your specific local regulations and hygiene standards are met.

Q: What is the maximum depth this sensor can withstand?

A: With an IP68 rating, this sensor is designed for continuous immersion. While specific pressure limits depend on installation, it is generally safe for typical aquarium, pond, and tank applications up to several meters deep.

Q: Is this sensor compatible with Raspberry Pi?

A: Yes, the DS18B20 is fully compatible with Raspberry Pi. You will need to enable the 1-Wire interface in the Raspberry Pi configuration settings and connect the data pin to a GPIO pin with a pull-up resistor.

Q: Can I extend the cable length?

A: Yes, you can extend the cable, but for long distances (over 10-20 meters), signal integrity may degrade. We recommend using shielded twisted-pair cable and ensuring a strong pull-up resistor if extending significantly.

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