Device Showcase: Wireless Kombi Transmitter for Indoor Air Quality Measurement

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In our Device Showcase article series, we feature Nokeval’s measuring devices, highlighting what each device measures, its unique features, and most importantly—how it simplifies your everyday life, one measurement at a time.

Wireless Kombi Transmitter Measures Indoor Air Quality Across Five Different Metrics

Clean indoor air maintains health and helps preserve the value of a property. Different spaces may also require varied indoor air conditions based on their intended use. To measure indoor air conditions and quality, we have developed the Kombi measuring device, which allows for comprehensive monitoring of indoor air quality across five different metrics.

The Kombi measures five key indoor air quality metrics: differential pressure (DP), temperature, humidity, carbon dioxide concentration (CO2), and total volatile organic compounds (TVOC). The Kombi is suitable for measuring the indoor air in various room types, from general office spaces to laboratories and clean rooms. The device has an IP rating of 20.

Top 3 Features of the Kombi Transmitter:

  • Measures five key variables in one device
  • Wireless
  • Compact size

Kombi sensors

Differential Pressure Measurement (DP)

Measuring differential pressure is particularly important in situations where it is necessary to maintain certain conditions, such as during construction, in clean rooms, laboratories, and hospital environments.

The Kombi transmitter allows for the wireless measurement of differential pressure between two different spaces, providing data on ventilation and the maintenance of clean indoor air. The device is suitable for measuring differential pressure in all residential and office buildings where the indoor air needs to remain slightly underpressured. For instance, if a laboratory requires overpressure to prevent outside air from entering, the Kombi can ensure that the overpressure is maintained appropriately. The Kombi’s measurement range is -125 to +125 Pa.

Total Volatile Organic Compounds Measurement (TVOC)

TVOC measurement is a method to quantify the total amount of volatile organic compounds in the air. Volatile organic compounds can originate from various sources, such as building materials, furnishings, cleaning agents, tobacco smoke, and other chemical processes.

TVOC measurements can be used to assess indoor air quality and are particularly useful in industrial environments where monitoring the concentrations of harmful chemicals in the air is necessary. These measurements can help identify and mitigate potential health risks.

Carbon Dioxide Measurement (CO2)

Measuring carbon dioxide levels involves quantifying the amount of CO2 in the air. Monitoring carbon dioxide levels is particularly significant in indoor environments, especially in meeting rooms where people spend significant amounts of time. High carbon dioxide levels can indicate poor ventilation and can adversely affect people’s health and well-being.

The Kombi transmitter accurately measures carbon dioxide levels, ranging from 400 to 5000 ppm, to assess air quality and ensure adequate ventilation.

Temperature and Humidity Measurement (TRH)

The Kombi also ensures the optimal temperature (-30 to +60 °C) and humidity levels (0 to 100 %RH) in a room. Optimal conditions enable energy-efficient operation of heating, ventilation, and air conditioning systems, which can lead to savings on energy costs.

Kombi sensor measures indoor air quality


Wirelessness makes device installation quick and cost-effective as no cabling is needed. Additionally, moving a wireless device from one space to another is easy.

Kombi transmitters can be connected either to the customer’s own measurement systems or to Nokeval’s NSnappy integration platform. Measurement data is automatically transmitted from the device to the NSnappy service via the Hub base station. Measurement data can be viewed in real-time from NSnappy remotely. If the measurement values deviate from their set limits, the service alerts to the deviations.

Available with Two Different Radio Technologies

The Kombi-LWEU device operates on LoRaWAN technology. It can be connected to local LoRaWAN network operators, such as the nationwide Digita LoRaWAN network. It can also be connected to the NSnappy cloud service or to customer-owned cloud services through the NSnappy Hub base station.

The Kombi-Sky device uses Nokeval’s proprietary Sky protocol based on LoRa technology. Kombi-Sky can be connected to the NSnappy cloud service via the Cell2 base station or to customer systems through the Stable-Sky-Node receiver.

Compact Size

The small, sleek, and unobtrusive design of the device makes it a stylish and discreet choice for any space.

Ready to take control of your indoor air quality?

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