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Home / Computer Hardware, Monitors & Peripherals / DS18B20 Fully Waterproof Temperature Sensor Water Temperature Sensor

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Interface Protocol 1-Wire
Temperature Range -55°C to +125°C
Accuracy ±0.5°C
Cable Length 1 Meter
Supply Voltage 3.0V to 5.5V
Probe Material Stainless Steel
Waterproof Rating IP68
Resolution 9 to 12-bit
Conversion Time 750ms
Wire Configuration 3-Wire (VCC, GND, Data)

5 reviews

A

Anonymous

Apr 14, 2026

Rating: 5/5

Brewing Essential

Use this for monitoring mash temperature. It is accurate enough for home brewing and cleans easily.

A

Anonymous

Mar 27, 2026

Rating: 4/5

Good Sensor

Accurate and easy to wire up to my Arduino. The cable is a bit stiff but manageable for my setup.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for Aquarium

Works great in my saltwater tank. The waterproofing is solid and readings are consistent with my glass thermometer.

A

Anonymous

Feb 12, 2026

Rating: 3/5

Needs Resistor

Works well but remember you need a pull-up resistor. I missed that at first and thought it was broken.

A

Anonymous

Jan 23, 2026

Rating: 5/5

Arduino Compatible

Easy to integrate using the OneWire library. No issues with stability over the last month of use.

5 FAQ

Q: What are the wire color codes?

A: Typically Red is VCC, Black is GND, and Yellow or White is the Data line. Please check your specific batch.

Q: Can this measure air temperature as well?

A: Yes, it can measure air temperature, but response time may be slower compared to liquid immersion.

Q: Does the package include a pull-up resistor?

A: No, the package includes the sensor and cable only. A 4.7k ohm resistor is required for operation.

Q: Is this compatible with Raspberry Pi?

A: Yes, this sensor is fully compatible with Raspberry Pi GPIO pins using the 1-Wire protocol.

Q: What is the maximum water depth this can handle?

A: With an IP68 rating, it is suitable for continuous submersion in water under typical aquarium or tank pressures.

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