Features:

• Simultaneously measures and data log multiple parameters such as CO, CO2, Temperature, and Relative Humidity, to monitor indoor air quality conditions.
• Calculates Dew Point, Web Bulb Temperature, Absolute Humidity, Humidity Ratio and % Outside Air.
• Built-in memory allows user to store multiple point measurements. Equipped with RS232C terminal.

Benefits:

• Easy user calibration with built-in calibration function.
• Capable to continuously monitor parameters via PC.
• Relative Humidity and Temperature measurements help determine thermal comfort levels.
• Large LCD shows multiple parameters at a glance.
• No need of psychometric chart - Calculates dew point, wet bulb temperature, absolute humidity and humidity ratio!

Specifications:

• CO
  Range: 0~500PPM
  Accuracy: +/-3% of reading or +/-3PPM whichever is greater
  Resolution: 0.1PPM: 0-99PPM 1PPM: 100-500 PPM
• CO2
  Range: 0~5000PPM
  Accuracy: +/-3% of reading or+/-50PPM whichever is greater
  Resolution: 1PPM
• Temperature
  Range: - 4 -140F (-20~60C)
  Accuracy: +/- 1F (+/-0.5C)
  Resolution: 0.1F (0.1C )
• Relative Humidity
  Range: 2~98%RH (0.1%RH step)
  Accuracy: 2~80%RH:±2%RH, 80~98%RH:±3%RH
  Resolution: 0.1%RH
• Function
  Normal Mode: Normal measuring (do not store and calculate the data.) Relative humidity, CO, CO2, Dew point, Wet bulb temperature, Absolute humidity and Humidity Ratio
  Calculation Mode: Store the data, and calculate the maximum, minimum and average value. % OA Mode Measure ventilation ratio (Ask for ventilation ratio by calculating from temperature and CO2 value)
  Data Output Mode: Perform re-calculation of stored data and output of data to PC and Printer.
  Calibration Mode: Perform the calibration of CO and CO2.
• Output
  Digital: RS-232C (Baudrate:4800,9600,19200,38400bps)
  Analog: (Optional) DC0~1V (Select 1 ch among CO, CO2, temperature, and relative humidity)
• Power Supply:
  AA Battery×6(Alkaline or Ni-Cd)
  AC adapter:AC100~240V (50/60Hz) (Optional)
• Battery Life: Approximately 10 hours (at 77F (25 C) with alkaline batteries, without RS232C)
• Operating Environment
  Main Body: 41-104F (5~40C)
  Probe: - 4 - 140F (-20~60C)
• Storage Environment: - 4- 140F (-20~60C)
• Standard Kit: Operation Manual×1, Mn Battery ×6, Probe stand, Calibration cap, Connection tube, and hard carrying case 
• Optional Accessories: Analog Output, Serial Printer, Communication Cable (For computer and printer), AC adapter.