• 1-Wire Digital Thermometer
  
• Measures Temperatures from -55°C to +125°C
  
• ±0.5°C Accuracy from -10°C to +85°C
  
• Standby current typically is 3µA
  
• Unique serial number
  
• Wires max 200meters
  

https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf