10Pcs DS18B20 DC 5V Digital Temperature Sensor Module For 
  
  Features:    It's easy to install with mounting holes, diameter of the hole is 2.5m.
  Digital signal output
  18B20 Temperature Sensor Chip
  Resolution adjustment ranges from 9-12 bytes.
  Operating current: DC5V.
  Temperature measurement ranges: -55°C to +125°C, be accurate to 0.5°C.
  Size: 28 x 12 x 10 mm
  Weight: 2g    
Package included:    10 x DS18B20 digital temperature sensor module