The DS18B20 is a low cost, low power and reliable temperature sensor that is very well supported, and widely used with Arduino, Raspberry Pi and other devices. It's very simple to use and can be included in many projects.
Operating Voltage 3.0 - 5.5V DC
Operating Current 4.0 mA max, 750 nA standby
Sensor Resolution 9 to 12 bit selectable resolution
-10 to +85 Celsius with ~0.5 Celsius accuracy
-55 to 125 Celsius with ~2.0 Celsius accuracy
Sampling Rate 1 second
Each sensor has an embedded unique ID which can be read in software. Sensors can be wired up in parallel and read independently, only using one data pin on your Arduino to read multiple DS18B20 sensors
Package Contents: 3x digital temperature sensor
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.