• 
  MH-Z19 Infrared CO2 Sensor Module for CO2 monitor

  MH-Z19 Infrared CO2 Sensor Module for CO2 monitor quantity

  ×$19.13
• 
  DFRobot Gravity: PM2.5 Air Quality Sensor

  DFRobot Gravity: PM2.5 Air Quality Sensor quantity

  ×$40.01
• 
  MQ-7 CO Carbon Monoxide Coal Gas Sensor Module

  MQ-7 CO Carbon Monoxide Coal Gas Sensor Module quantity

  ×$0.81
• 
  ASAIR AOF1010 Ultrasonic Oxygen Sensor

  ASAIR AOF1010 Ultrasonic Oxygen Sensor quantity

  ×$7.15
• 
  PC817 4 CH Optocoupler Isolation Module

  PC817 4 CH Optocoupler Isolation Module quantity

  ×$1.27
• 
  CH341A 24 25 Series EEPROM Flash BIOS USB Programmer with Software & Driver

  CH341A 24 25 Series EEPROM Flash BIOS USB Programmer with Software & Driver quantity

  ×$1.30
• 
  Mini DC-DC Boost Converter 0.9V~5V to 5V 600MA USB Output charger step up Power Module

  Mini DC-DC Boost Converter 0.9V~5V to 5V 600MA USB Output charger step up Power Module quantity

  ×$0.24

Subtotal: $69.91

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