W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI
Data sheet:


  • Monitor CO2

Appropriate ventilation based on actual CO2 values

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 700 to 3000 ppm (The RKI recommended limit is 1000 ppm.) When this value is reached, visual and optional acoustic signals are generated.



  • CO2 sensor:
    • Measuring range: 0-5000 ppm CO2
    • Display range: 400-5000 ppm CO2


  • Remaining time display:
    • 12 LEDs for displaying the last hour and numerical 7-segment display for indicating the last two hours before ventilation and for alarm signaling
      (Patent applied for)
  • LED traffic light:
    • For visual indication of the air quality
  • Alarm function:
    • 7-segment display for optional indication of the current CO2 value.
    • Alarm beeper can be enabled
  • Possible applications:
    • Monitor CO2 values in the office, meeting rooms, schools etc.

Standards & more

  • Conforms to standards both in office and industrial environments:
    • High noise resistance per EN 61000-6-2
    • Low noise emission per EN 55032:2015 + A1 Cl. B, EN 61000-3-2 & EN 61000-3-3
  • 2 year guarantee

Technical data

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:
    • 0-5000 ppm CO2
  • Display range:
    • 400-5000 ppm CO2
  • Resolution:
    • 1 ppm CO2
  • Measuring error:
    • Air quality (400-5000 ppm):
    • max. ±100 ppm +5% of the measured value
  • Measuring frequency:
    • 10s

Housing and other data:

  • Housing:
    • Compact plastic housing for wall mount or magnetic attachment to a whiteboard or similar
    • ∅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


*Net unit price for
commercial users
  • Further accessories

    • Pouch for timeair
    • 97201
    • 4.20€

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.