SEZO EM - pomiar jakości powietrza wewnątrz pomieszczeń

Monitoring Indoor Air Quality

SEZO EM is a compact sensor device, measuring indoor air quality based on VOCs (Volatile Organic Compounds), environmental parameters, luminosity and noise level, with a built-in accelerometer, magnetometer and motion detection. This handy device is suitable both for indoor and outdoor environment monitoring.


SEZO EM provides information about the quality of indoor air by measuring the level of volatile organic compounds, which are harmful to human health and life. The device informs whether it is safe to stay in the room.


LTE-M is a low-power long-range network designed specifically for IoT devices for direct connection to 4G networks. It supports high-speed data transfer enabling real time communication – thus enabling monitoring of resources.


SEZO EM is integrated with the Orange Live Objects platform, which facilitates the preview and analysis of the data collected by the device through easy USB configuration or preconfiguration of the device according to customer requirements. It is also possible to connect the device to another, already existing platform that your company uses, thanks to the possibility of easily establishing a network server, eg The Things Stack, Chirpstack. The decoder is available for download on github SEZO.

SEZO EMR - Air Quality Monitoring
  • SEZO EM monitors environmental parameters such as temperature, humidity, atmospheric pressure, light intensity and indoor air quality (VOCs).
  • The built-in accelerometer and PIR sensors can detect human presence within a range of at least 5 meters from the device.
  • SEZO EM sends data at the moment of an event (e.g. motion detection) or at user-defined intervals. The device is configured using OTA (over the air) method, i.e. wirelessly.
  • The SEZO EM device uses LTE-M technology and has a nanoSIM slot.
  • SEZO EM is battery powered for convenient use. The batteries allow up to 5 years of continuous operation.
SEZO EMR - Air Quality Monitoring
Get in touch with us to create a personalised system tailored to your needs. We will be happy to provide support starting with the concept phase and ending with the implementation of your system.

Use Cases


SEZO EM makes refineries and chemical production companies more secure.

Facility managers leverage the SEZO EM device to measure shocks and movements of critical facility components and machinery, thanks to the built-in accelerometer.

The device can be adjusted to client’s individual needs, involving the measurement of basic environmental parameters, i.e. temperature, humidity, atmospheric pressure and sound levels. The device has an integrated alarm threshold configuration, giving the user the capability to adjust alarm thresholds of all measured parameters (e.g. light and acoustic intensity).

The device is capable of sending data to the Orange Live Objects platform via LTE-M.


SEZO EM makes public institutions more comfortable and efficient.

Public facilities like libraries, museums or city halls leverage SEZO EM capabilities such as monitoring temperature, humidity, sound level, and illumination to make the space more comfortable and efficient. Thresholds for the measured parameters can be set individually through the build-in alarm threshold configuration.

The integrated accelerometer enables measurement of shocks and/or movements (e.g. of objects such as doors or exhibition pieces) and can potentially decrease response time of facility security (more reliable than CCTV).

The device is capable of sending data to the Orange Live Objects platform via LTE-M.


SEZO EM makes school a safe and comfortable place for children and staff.

School management leverages SEZO EM to keep track of the noise levels on the school premises to prevent children and staff from being repeatedly exposed to potentially harmful sounds’ volume.

SEZO EM monitors indoor air quality inside clasrooms. Paints or plastic toy parts can release volatile chemicals when exposed to heat. These can cause breathing problems, nausea, and pinched eyes – which is why it is important to regularly check the effectiveness of ventilation in school rooms.

The device is capable of sending data via LTE-M to the Orange Live Objects platform.


SEZO EM enhances security processes at industrial manufacturing sites.

The device is capable of sending data to the Orange Live Objects platform via LTE-M and pulls data from the environment like e.g. sound levels. SEZO EM device is powered by two 6Ah batteries.

The device has an integrated PIR (infrared) sensor, commonly used in alarm systems and automatic lighting systems, so it can detect the presence of people. The built-in light sensor, on the other hand, helps to monitor lighting in rooms.

The device has an alarm threshold configuration for all measured parameters.

Do you want to share information about SEZO EM with your company’s CTO?
Send a link to this page or attach a brochure in PDF format – available for download below.


Measured parameters

VOC concentration, Temperature, Humidity, Air Pressure, Luminosity, Noise, Acceleration, Motion (PIR)

Operating temperature

-30 ÷ 60°C

Measurement range and accuracy

  • IAQ (Indoor Air Quality), range 0-500, typ. ±15, measurement resolution 1
  • Temperature: -30 ÷ 60°C, typ. ±0.3°C, max ±1°C 
  • Humidity: 0 ÷ 100%, typ. ±2%, max. ±5% @25°C
  • Air pressure: 260 ÷ 1260 hPa, ±1 hPa
  • Luminosity: 0 ÷ 1000 lx, typ. ±50 lx
  • Noise: 40 ÷ 100dB, ±6dB at voice frequency band
  • Accelerometer: 0 ÷ ±157 m/s2 , max. ±7%
  • Magnetometer: 0 ÷ ±49gauss, max. ±7%
  • PIR motion detection: at least 5m range for human-sized object 

Communication protocol

LTE-M; microSIM (eSIM/Soft SIM options)

Frequency and transmission power

LTE-M band, maximum 33 dBm

Data transmission interval

Default 15 minutes or event-triggered (configurable OTA)

Power supply

2x 3.6V high-power lithium ER26500M batteries

Enclosure and mounting

IP55, polycarbonate, four screw holes



Product dimensions

Length 113 mm, height 80 mm, width 60 mm

Contact us to create a system tailored to your requirements. We will be happy to provide support from the concept phase to the implementation of your system.

Our engineers are experienced in solving EMC problems - you can be sure that the tested device is EMC compliant.

aleja Zwycięstwa 96/98
81-451 Gdynia, Poland

+48 58 663 10 10

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SEZO sp. z o.o.  realizuje projekt dofinansowany z Funduszy Europejskich
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