SparkFun
Temperature Sensor - High Temperature, Waterproof (DS18B20)
A sealed, waterproof DS18B20 digital temperature probe for precise measurements in wet or harsh environments. The sensor communicates over a 1-Wire interface...
A sealed, waterproof DS18B20 digital temperature probe for precise measurements in wet or harsh environments. The sensor communicates over a 1-Wire interface, requiring just one data pin (plus ground) to connect to your microcontroller. It can even be parasitically powered from the data line.
Each DS18B20 has a unique silicon serial number, so multiple probes can share a single 1-Wire bus — ideal for multi-point temperature monitoring in HVAC systems, equipment, and process control.
Specifications
- Sensor – DS18B20 digital temperature sensor
- Input Voltage – 3.0–5.5V
- Temperature Range – -55°C to +125°C
- Accuracy – ±0.5°C (-10°C to +85°C)
- Resolution – Programmable 9 to 12 bits
- Interface – 1-Wire
- Probe Diameter – 7 mm
- Probe Length – ~26 mm
- Overall Length (with wire) – 6 ft (~1.8 m)
- Waterproof – Sealed stainless steel probe
Wiring
- Red – Vcc
- Black – GND
- White – Signal (Data)
Ideal For
- Liquid temperature monitoring (aquariums, brewing, hydroponics)
- HVAC and environmental controls
- Multi-point temperature sensing on a single bus
Package Contents
- 1× Waterproof DS18B20 Temperature Probe
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 1-Wire
- 1-Wire is a communication method where devices share a single data line, often with each device having its own address. It matters because several temperature modules can be connected to one microcontroller pin instead of needing a separate pin for each probe.
- DS18B20
- A common digital temperature sensor often sold in waterproof probe form. It matters here because the kit does not include temperature measurement, and a DS18B20 is the suggested add-on if your water readings need temperature context.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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Brands
Temperature Sensor DS18B20 Datasheet
Datasheet · 95.5 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 407.2 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
