DS18B20 Temperature Sensor digital arduino sensor


One pin for Power (Vdd)
Another for Ground (GND)
Final center pin for Data (DQ)
 
Technical Specifications:
Usable temperature range: -55 to 125°C (-67°F to +257°F)
9 to 12-bit selectable resolution
Uses 1-Wire interface- requires only one digital pin for communication
Unique 64 bit ID burned into chip
Multiple sensors can share one pin
±0.5°C Accuracy from -10°C to +85°C
Temperature-limit alarm system
Query time is less than 750ms
Usable with 3.0V to 5.5V power/data


The DS18B20 is a precision 1-wire digital temperature sensor (±0.5°C over much of the range). It works with any microcontroller and requires only one data pin. 


Each sensor has a unique 64-bit ID factory embedded, allowing multiple units to reside on a single data pin and read using software to differentiate each.


Reading the data from the sensor does require coding of the 1-Wire protocol and can be complex. There are several libraries for Arduino and Raspberry Pi available, depending on your requirements. 


Each DS18B20 sensor does require an external 4.7k resistor between the data (DQ) and Vdd leads. We have resistors available separately.