Description
Reviews
| 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 |
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.
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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