Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | DS18B20 |
| Package Type | TO-92 |
| Interface | 1-Wire Digital |
| Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C (from -10°C to +85°C) |
| Resolution | 9 to 12-bit configurable |
| Supply Voltage | 3.0V to 5.5V |
| Condition | Brand New |
| Origin | Domestic Manufacturing |
| Application | Industrial Control, HVAC, Battery Systems |
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect for Arduino Projects
These sensors work flawlessly with my Arduino setup. The 1-wire protocol makes wiring very simple, and the temperature readings are consistent and accurate.
Anonymous
Mar 17, 2026
Rating: 5/5
Exactly as described
Arrived quickly and matched the description perfectly. The TO-92 package is standard and easy to solder onto perf boards.
Anonymous
Mar 15, 2026
Rating: 4/5
Good value for bulk purchase
Bought a pack for a home automation project. Most of them worked perfectly out of the box. One had a slightly loose pin, but overall great value for the price.
Anonymous
Mar 13, 2026
Rating: 5/5
Reliable for soil monitoring
I waterproofed these myself and buried them in my garden beds. They have been running for three months without any drift in data. Highly recommended.
Anonymous
Mar 11, 2026
Rating: 5/5
Easy to code for
As a beginner, I found plenty of libraries available for this chip. It responded immediately to my test sketches. Great learning component.
Anonymous
Mar 05, 2026
Rating: 4/5
Solid performance
We used these in our robotics competition bot. They handled the voltage fluctuations well and provided fast enough updates for our needs.
Q: Can I connect multiple sensors to a single GPIO pin?
A: Absolutely. The DS18B20 supports multi-drop capability, allowing you to connect many sensors to one data line, each identified by a unique serial number.
Q: What is the maximum cable length for reliable operation?
A: While it depends on cable quality and environment, standard practice suggests keeping cables under 50 meters for optimal signal integrity without additional buffering.
Q: How do I identify individual sensors if I daisy-chain them?
A: Each chip comes factory-programmed with a unique 64-bit ROM code. You can use a search command in your code to list and address each sensor individually.
Q: Is this compatible with 3.3V logic systems like Raspberry Pi?
A: Yes, the DS18B20 operates between 3.0V and 5.5V, making it directly compatible with 3.3V systems such as the Raspberry Pi.
Q: Does this sensor require an external pull-up resistor?
A: Yes, for reliable communication on the 1-Wire bus, a 4.7kΩ pull-up resistor between the data line and VCC is strongly recommended.
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