BMP180 Digital Barometric Pressure Temperature Altitude Sensor
Price in Sri Lanka

Specifications:

• Barometric Pressure Sensing Range: 300hPa to 1100 hPa (-500m to +9000m relating to sea level) with accuracy down to 0.02 hPa, in advanced resolution mode
• Resolution: 0.03hPa (0.25m)
• Temperature Sensor Accuracy: +-3.6 Fahrenheit (+-2 Celsius)
• Supply Voltage: 1.8V to 6V; 
• I2C Interface
  • I2C Device Address: 0x77
  • Max I2C Speed: 3.4Mbit/sec. (I2C standard, fast and high-speed mode supported)
• Low noise, with 0.06hPa (0.5m) in ultra low power mode and 0.02hPa (0.17m) advanced resolution mode
• Pins are breadboard compatible
• Operating Temperature Range: -40 to 185 Fahrenheit (-40 to 85 Celsius)
• Dimensions (excluding pins): 15mm (0.6") length x 13.5mm (0.05") width x 2.6mm (0.1") height
• Weight: 0.95g (0.03oz