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  • CO2 Sensor User Guide
    CO2 sensor user guide.
  • Explaining The AirTest Self Calibrating CO2 Sensor
    The self-calibration algorithm used in all AirTest CO2 sensors targeted for ventilation control in buildings has been used extensively since 1993. This algorithm is called "ABC", which stands for Automatic Background Calibration. The figure below shows the initial use of the ABC algorithm by 32
  • Improved Method for CO2 Measurements
    drink. An improved method of measuring CO2 uses thermal conductivity technology to. measure the "true" amount of CO2 in beverages independent of other gases. Hach Ultra has. developed and patented a TC (thermal conductivity) sensor with no moving parts or drift.
  • Infrared Sensor Technology and its Impact on HVAC CO2 Measurement Accuracy
    Modern ventilation systems recirculate indoor air in order to minimize the amount of. energy required to treat outside air. Using carbon dioxide (CO2) sensors as indoor air. quality indicators helps to ensure a fresh outside air supply to building occupants while. simultaneously optimizing energy
  • CO2 DCV Control, Sequence Of Operation For Buildings
    One sensor should be used for each zone of major occupancy or per air handling device if a number of devices serve a large zone. If occupancy density/patterns/usage are different in two adjacent areas each area should be considered a separate zone. Generally one sensor can serve up to 5,000 sq feet
  • Passive Sensing of Driver Intoxication (.pdf)
    A sensor that passively monitors the driver for intoxication has been demonstrated. The driver's blood alcohol concentration (BAC) is obtained by sensing alcohol and CO2 in air drawn from the vehicle cabin. With a legally drunk driver, the steady state alcohol concentration can be as low as 0.3 ppm
  • Method for Computing Alkalinity Based On Total Inorganic Carbon (TIC) and Related Data (.pdf)
    Standard Methods (Ref. 1) has a procedure using nomographs for estimating CO2 concentrations (Method 4500-CO2 B) based on total alkalinity titrations. The method presented here reverses that process by computing alkalinity based on TIC measurements using infrared technology. These two methods
  • Direct In Situ Zirconia Oxygen Analyzer (.pdf)
    and pulp, food, or textiles, as well as incinerators and medium/small boilers. It can help conserve energy in these industries. The ZR402G also contributes to preservation of the earth's environment in preventing global warming and air pollution by controlling complete combustion to reduce CO2, SOx

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