Measuring the CO2 concentration with the timeair - W&T

December 7, 2020

Appropriate ventilation based on actual CO2 values

Regular ventilation is important and is currently on everyone's lips. Fresh outside air not only reduces aerosol concentrations, but also prevents tiredness and concentration difficulties. In the cold season in particular, however, it is often difficult to find an equally effective and compatible ventilation rhythm.

The timeair could be the solution! The timeair measures the CO2 concentration in the ambient air and uses the real measured values to determine the time remaining until the next "ventilation cycle". This way, the user can plan his behavior much better and is not only alerted when it is actually too late. The device only needs a USB power supply and can otherwise be used flexibly - from daycare centers and schools to office and event rooms to private apartments.


The timeair measures the CO2 concentration in the ambient air and uses that to determine when the next air exchange needs to occur. In daycare centers and schools, meeting and event spaces, but especially also in areas that are highly frequented it is difficult to have an overview of the correct ventilation measured. The timeair gives you room air feedback in real time and triggers alarms based on measured values instead of using a CO2-independent timer.

Compared with CO2-only sensors the timeair indicates not only the current carbon dioxide content of the ambient air, but also uses 12 LEDs to indicate the remaining time until a critical limit is reached. This can then be individually configured over a range of from ... to ... ppm (The RKI recommended limit is 1000 ppm.) When this value is reached, visual and optional acoustic signals are generated.
 

Sensor, connectivity, standards & more

CO2 sensor; measuring range: 400-5000 ppm CO2
LED indicators on the unit for visual identification of the air quality
Alarm and reporting function:
- 7-segment LED indicator for actual CO2 values and remaining time until venting
- 12 LEDs for showing the last hour before venting and for alarm signaling
- Alarm beeper can be enabled


Possible applications

Monitor CO2 values in offices and schools
High noise resistance for industrial environments
Low noise emission for residential and business areas
Conforms to standards both in office and industrial environments
 

Connections and displays

  • Sensor:
    • CO2 air quality measurement
  • Supply voltage:
    • DC 5V over Micro-USB socket
  • Supply connection:
    • Micro-USA socket
  • Current consumption:
    • typ. 200mA @5V DC
  • Displays:
    • LED 7-segment display for measurement value and remaining time
    • LED color ring for indicating remaining time and alarm
    • LED CO2 indicator lights
  • Operating elements:
    • 3 touch sensors for device configuration

Measuring unit

  • Measuring range:
    • 400-5000 ppm CO2
  • Resolution:
    • 1 ppm CO2
  • Measuring error:
    • max. ±100 ppm ±5% of the measured value
  • Measuring frequency:
    • 10s

Housing and other data

  • Housing:
    • Plastic compact housing for wall mount or tabletop
    • ∅88mm x 18.9mm
  • Enclosure rating:
    • IP20
  • Weight:
    • approx. 70g
  • Ambient temperature
    • Storage: -40..+70°C
    • Operating: 0 .. +40°C
  • Permissible relative humidity:
    • 0...90% relative humidity (non-condensing)
  • Scope of delivery:
    • 1x timeair
    • 1x USB AC adapter DC 5V, 1A
    • 1x USB cable with USB-Micro plug, 1.8m

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