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 31, 2026

Rating: 4/5

Good value but cable is stiff

The sensor itself is accurate and easy to code for. My only complaint is that the cable is a bit stiff, making it slightly difficult to route in tight spaces. Otherwise, great product.

Anonymous

Mar 26, 2026

Rating: 5/5

Reliable industrial grade feel

I bought five of these for a hydroponic system. They have been submerged for three months without any issues. The stainless steel probe feels very durable.

Anonymous

Mar 18, 2026

Rating: 5/5

Easy to integrate

Plug and play with Raspberry Pi. The 1-wire protocol makes wiring simple since you can daisy-chain multiple sensors on a single data pin. Very happy with this purchase.

Anonymous

Mar 07, 2026

Rating: 5/5

Perfect for my aquarium project

This sensor works flawlessly with my Arduino setup. The waterproofing is solid, and the temperature readings are consistent with my glass thermometer. Highly recommended for DIY projects.

Anonymous

Mar 05, 2026

Rating: 4/5

Accurate and fast

Response time is quick when moved between different water temperatures. I verified the accuracy against a calibrated lab thermometer and it was within 0.2 degrees. Lost one star because the connector wasn't included.

Anonymous

Mar 02, 2026

Rating: 5/5

Best DS18B20 I've found

I have tried several brands of waterproof DS18B20 sensors, and this one has the best build quality. The seal on the probe looks very professional and robust.

5 FAQ

Q: Can this sensor be used in saltwater aquariums?

A: Yes, the stainless steel 304 probe is resistant to corrosion and suitable for saltwater environments, provided the cable connections remain dry.

Q: Can I use this with a 3.3V microcontroller?

A: Yes, the sensor operates within a voltage range of 3.0V to 5.5V, making it fully compatible with 3.3V systems like many ESP32 or Raspberry Pi models.

Q: Is the output analog or digital?

A: The DS18B20 outputs a digital signal via the 1-Wire protocol, so no analog-to-digital converter is needed.

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

A: No, the sensor does not include an external pull-up resistor. You will need to add a 4.7kΩ resistor between the data line and VCC in your circuit.

Q: What is the maximum cable length extension possible?

A: While the standard cable is 1 meter, users often successfully extend the data lines up to 10-20 meters using shielded twisted pair cable, though signal integrity may vary based on environment.

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