ELS-ERS certified


LoRa CO2 sensor

Measures air quality (CO2 particles, 0 – 10,000ppm)
Other values: temperature, humidity, movement and brightness
Enormous wireless range – no comparison with WiFi
Low maintenance due to long battery life
Plug & play integration with the LineMetrics platform


The LoRa CO2 sensor measures the CO2 content of the ambient air every 5 minutes. This data helps to create the best possible working environment and indicates aerosols that may be contaminated with viruses (e.g. corona). If freely definable limit values are exceeded, warning messages can be sent to call for ventilation. The high measuring accuracy is made possible by automatic calibration (Automatic Baseline Calibration based on the 8-day minimum).

Temperature, humidity and brightness data can be used to optimize heating, air conditioning and lighting conditions. Subjective discussions can be objectified to create a pleasant indoor climate for everyone. The integrated motion sensor transmits the number of movements within each 15-minute interval. This enables usage analyses and helps, for example, to adjust cleaning or heating only on the basis of actual usage.

The sensor also has a long radio range inside buildings and a battery life of up to 3 years. Thanks to a special transmission protocol, maximum availability of the measured values (>99%) can be achieved even at long ranges and in challenging environments. Its simple design makes this sensor suitable for any environment, such as offices, schools or healthcare facilities.

Technical data

    • CO2: 0 – 2,000 ppm (+-50 ppm/+-3%); 2,000 – 10,000 ppm (+-10%)
    • Temperature: 0 – 50 °C (+-0.2°C)
    • Humidity: 0 – 85% RH (+-2%)
    • Brightness: 4 – 2,000 LUX (+-10 LUX)
    • Movements: Value from 0 – 256 per 15-minute interval (detection angle 90°, max. range 5 m)
    • Transmission interval: 5 minutes
    • Data availability: >99% even at long radio distance
    • LoRa radio range: max. 8km outdoor / some 100m indoors
    • Power supply: 2x 3.6 V AA lithium batteries, runtime depends on connection quality Sensor <-> LoRa Gateway
    • Application environment: Indoor environments such as offices, schools, etc. (not suitable for outdoor or industrial environments!)
    • Size & weight: 86 x 86 x 28 mm, 100 g incl. Battery
    • Scope of delivery: Sensor, instructions, QR sticker, mounting material
    • Data sheet (English, manufacturer)
    • User manual (English, manufacturer)

Measuring points

Data acquisition

  • The CO2 level is an indicator of indoor air quality (e.g. office, school classroom) and is transmitted every 5 minutes.
  • Value range: auto-calibrated from 0 – 2,000 ppm (+/-50ppm), total measuring range from 0 – 10,000 ppm (up to 10% deviation)
  • To enable auto-calibration, the sensor must be placed in a room with regular air exchange. For information on auto-calibration, see the Help Center or FAQ section.
  • Further information on CO2 concentration, indoor climate and Covid-19 can be found in this presentation.


Visualization / screenshot as line diagram (1-hour resolution):

Development of a CO2 level over the course of a month incl. Areas (and statistics) in the LineMetrics Cloud. The color-coded areas can be configured individually.

Data acquisition

  • The indoor air temperature (e.g. office, classroom) is transmitted every 5 minutes.
  • Value range: 0 – 50°C (resolution: 0.1°C; accuracy: +/- 0.2°C)


Visualization / screenshot as line diagram (1-hour resolution):

Temperature profile of a month in a LineMetrics office. As can be seen from the ranges, the majority of the measured values are within the optimum temperature range for an office. The color-coded areas can be configured individually.

Data acquisition

  • The relative humidity indoors is transmitted every 5 minutes.
  • Value range: 0 – 85% RH (resolution: 0.1% RH; accuracy: +/- 2% RH)


Relative humidity curve over an entire month in a LineMetrics office.

Data acquisition

  • The sensor uses a PIR sensor to detect movements within a radius of max. 5 meters.
  • The number of movements is sent every 5 minutes.

Detection area (lateral view when the sensor is mounted at a height of 1.60 m):


Shows the number of movements per hour in a LineMetrics office (in times of home office).

Movement data can be further calculated into room status data in the LineMetrics Cloud:

Times during a day when a LineMetrics office space is occupied (1) or not occupied (0).

Note: Due to the fixed transmission interval of 15 minutes, the occupancy status of the room cannot be recorded in real time! If the occupancy of a room is required in real time (e.g. meeting room occupancy after booking), the LoRa room occupancy sensor should be used.

Data acquisition

  • The recorded light intensity indoors is transmitted every 5 minutes.
  • Value range: 4 – 2000 LUX (resolution: 1 LUX / accuracy: +/- 10 LUX)


Progression of light intensity over the course of a month in a LineMetrics office.

Recommended use cases

Measure CO2 and Increase Productivity

Reduce Sick Leaves with Optimal Humidity

Room Occupancy and Usage

Prevent Covid-19 and reduce sick leave

Digitization opportunities in facility management

Healthcare facilities: Preventing infections with CO2 alarms and reducing operating costs

Optimized indoor climate for greater performance with LineMetrics

Is your use case not included?

Tested for you: The best sensor on the market

This sensor has prevailed against comparable models in our test laboratory and has proven itself in practice.

Enorme Funkreichweite: Ganze Gebäude abdecken

Many kilometers of range outdoors or hundreds of meters indoors – no comparison with WiFi! More >

Battery-operated with up to 5 years runtime

LoRa radio is very energy efficient. Depending on the quality of the wireless connection, the batteries will last for many years.

Plug and Play

Plug & Play integration into the overall system

It’s easy to obtain your first measurement data in just a few minutes thanks to the modular system – from the sensor to the cloud.

Your benefits with the LineMetrics platform

All-in-one: A complete system for room monitoring

ELS-ERS certified

1. Record air quality & Co2

The battery-operated CO2 wireless sensor can be installed in any room. It reliably records all values and transmits them via LoRa.

2. transmit measurement data

The LoRa wireless gateway creates a wireless network for up to 1,000 sensors. The collected measurement data is transmitted to the cloud via mobile radio.


3. evaluate and alert

All sensors are managed and all measurement data stored in the cloud. Analyses, alerts and data integration via API are easily possible.

What is behind it? Find out what LineMetrics can do to help you easily obtain the measurement data you need.

Developing and operating an IoT-based monitoring solution is more complex than many people think. Here is just a small excerpt of what LineMetrics can do for you in the background so that you can easily and reliably obtain the measurement data you need:

  • Selection of international suppliers, supply chain management and price negotiations
  • Selection and testing of individual hardware devices, hardware quality management
  • Device and firmware management
  • Optimizations in terms of radio range and battery life
  • Database management
  • Connectivity management (SIM cards)
  • Security and encryption, including updates
  • Creation of instructions and support during rollout
  • 24/7 monitoring of the entire solution, support in the event of problems

Cloud platform: Analyze and process measured values

The LineMetrics Cloud allows you to create individual dashboards on which you can keep an eye on the data that is most important to you. Measured values can be displayed, combined and colored in the form of bars, curves, dial gauges, etc. This screenshot shows past and current measured values of the sensor:

Warning messages can be created for individual ranges/limit values and provided with a trigger delay. This means that no warning is sent if critical values are only briefly exceeded. A second condition for triggering a warning can also be configured.

Alerts can be sent by e-mail (see screenshot) or SMS. The recipient, subject and message can be easily configured individually.

Plug & play: obtain measurement data quickly and easily (< 3 minutes!)

The LineMetrics complete solution enables the solution to be commissioned via plug & play – without technicians, IT department, cable laying and network access. We will send you all the hardware with all accessories and simple commissioning instructions. The first measurement data can be analyzed in the LineMetrics Cloud within a few minutes. For questions, problems and tips, we have set up a comprehensive service center for you and can of course also be contacted personally at any time.

Instructions included

Specially created commissioning and installation instructions, printed and available online. Example >

Includes LiSOCl2 batteries

Highest energy density and constant voltage level over the entire discharge period.

Mounting material included

3M VHB adhesive pads and/or screws (TX20) as well as dowels from Würth are included.

Includes QR Code Sticker

Read measured values on your cell phone: Simply scan the QR code and view the values. Try it out >

Enterprise-ready: The flexible and future-proof business solution


Strict quality criteria

Our quality requirements include not only certified hardware, but of course also the security of your data. LineMetrics therefore relies exclusively on highly encrypted communication and multiple redundant servers in high-security data centers in the DACH region.


Efficient roll-out

A fast and cost-effective roll-out is possible with employees on site, no matter how many locations, no matter where in Europe. Everything required for commissioning and operating the solution is included – right down to the SIM card with LTE data package.

Professional support

A competent contact for questions, whether it’s about sensors, wireless connections, databases or dashboards. In addition, the help center, knowledge base and support ticket system are available 24/7.

API Schnittstelle

Simple integration (API)

Existing software and apps can continue to be used and automatically enriched with sensor data via API. This does not change existing processes and IT systems.

The most important questions and answers from the field

Where do I mount the sensor?
CO2 sensors should be mounted at approximately head height, i.e. at a height of around 1.8m. Placement near windows, doors or ventilation systems can falsify the measured values. Details can be found in the commissioning instructions supplied.

How many sensors do I need?
Ideally, an area of 20 to 25 m² is monitored with one sensor. This guide value naturally depends on the room layout and how closely monitoring is to be carried out. For larger projects, we are happy to create individual concepts based on the room plans.

How is calibration carried out?
The sensor calibrates itself using ABC (Automatic Baseline Calibration). To do this, it measures the lowest CO2 value within an 8-day period and uses this as the starting value (400 ppm).

What are the CO2 limits?
Fresh air contains 400 ppm (parts per million). Even a concentration of 1,000 ppm impairs work performance; values around 1,500 ppm indicate poor air quality. Several tens of thousands of ppm are considered life-threatening.

Can I remove the sensor?
The sensor can be easily removed and placed elsewhere as long as it is within the radio range of a LineMetrics LoRa gateway in the same account.

Can I buy just the sensor?
No. LineMetrics is not a hardware vendor, but the ideal solution for anyone who wants to focus on their business and drive it forward with sensor data. This is only possible with an all-in-one solution.

Do you have any questions or would you like a specific offer?

To the sensor overview >