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  5. BZ30 CO2 Air Quality Data Logger

BZ30 CO2 Air Quality Data Logger

For autonomous long-term recording of indoor air quality

This CO2 air quality data logger is the ideal combination measuring device for architects, experts and every heating, ventilation and air conditioning engineer.

The BZ30 provides you with all functions and equipment features of the BZ25 and is further equipped with a large data memory for 50,000 measured values for the long-term recording of carbon dioxide concentrations, air temperature and humidity values in freely definable measuring intervals from 1 second to 12 hours.

The recorded data can be conveniently transferred to the connected PC via a fast USB connection and there analysed and logged using the analysis software included in the scope of delivery.

Owing to the integrated Li-Ion battery, the BZ30 is also suited for mobile application in addition to the stationary table installation.

The simultaneous recording of humidity and temperature values plus CO2 concentrations offers property managers or landlords optimal possibilities to monitor the ventilation habits.

Automatic baseline calibration

The expected CO2 fresh air value is about 400 ppm (0.04 %vol) nowadays. The device assumes this value to be the lowest limit value (baseline). Over several days, a special algorithm now permanently checks the lowest CO2 value measured of the sensor over a preconfigured time interval and slowly corrects every long-term drift determined by comparison with the expected fresh air value of 400 ppm (or 0.04%vol) CO2. In normal indoor applications, the carbon dioxide level usually decreases almost to outdoor air level at some point during one week. By recording the values over a period of 8 days and then comparing the lowest value to the 400 pm point, the device determines whether or not it needs to adjust the zero point. This takes place fully automatically. The algorithm therefore makes use of the fact that the CO2 content in buildings and rooms regularly stabilises at a minimum for a certain period of time when they are not occupied. In rooms that are continuously occupied or where there is a constantly increased CO2 concentration (e.g. in greenhouses), this principle of automatic balancing therefore does not work.

A few practical benefits:

  • Accurate and permanently stable NDIR measurement of carbon dioxide concentrations in the room air
  • Simultaneous display of CO2 values, room temperature, humidity, date and time
  • Minimum and maximum value function for CO2, air temperature and humidity
  • Automatic Baseline Calibration
  • Carbon dioxide alarm function with acoustic alarm signal for freely definable limit values
  • Additional symbolic CO2 indicator display
  • Large backlit display with easily legible measured value indication
  • Autonomous long-term recording of carbon dioxide concentration, room temperature and humidity
  • Storage for 50,000 measured values
  • Freely definable saving interval
    from 1 second to 12 hours
  • USB interface for measuring data transfer
  • Free standing or wall mounted
  • PC analysis software


CO2-Luftqualitätsdatenlogger BZ30 show in Trotec online shop

CO2-Luftqualitätsdatenlogger BZ30

You save: 64.91 €

194.86 € 129.95 € incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number 3.510.205.015
Air temperature [°C]
  Measuring principle | Air temperature NTC
  Min. measuring range | Air temperature [°C] -5
  Max. measuring range | Air temperature [°C] 50
  Display resolution [°C] 0.1
  Accuracy ± | Air temperature [°C] 1
Air temperature [°F]
  Min. measuring range | Air temperature [°F] 23
  Max. measuring range | Air temperature [°F] 122
  Display resolution [°F] 0.1
  Accuracy ± | Air temperature [°F] 1.8
Relative humidity
  Min. measuring range [% RH] 0.1
  Max. measuring range [% RH] 99.9
  Display resolution [% RH] 0.1
  Accuracy [% RH] 5
CO2 concentration
  Measuring principle NDIR
  Min. measuring range | Carbon dioxide [ppm] 0
  Max. measuring range | Carbon dioxide [ppm] 9,999
  Accuracy | Carbon dioxide [ppm] 75
  Accuracy | Carbon dioxide [%] 5
  Accuracy ±75 ppm / ±5 %
  Display resolution [ppm] 1
Memory organisation
  Sampling interval > 1 s
  Saving interval > 1 s
  Memory 50,000 Measured values
Device control
  Push buttons
Housing design
Power supply
  Internal (battery) 1 x 3.7 V Li-ion battery or 230 V power adapter
  Length (packaging excluded) [mm] 90
  Width (packaging excluded) [mm] 110
  Height (packaging excluded) [mm] 98
  (packaging excluded) [kg] 0.245
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Power adapter
  USB connection cable
  PC software (download)
  Operating manual
Ascertainable measured values and functions
Internal sensors
  Relative humidity [%]
  CO2 concentration [ppm]
  Air temperature [°C]
  Air temperature [°F]
Functions and features
  Minimum value display
  Maximum value display
  Measured value hold function
  Automatic Baseline Calibration
  Switching function °C/°F
  Backlit display
  CO2acoustic alarm function
  Feel-good indication
  Battery status indication

 standard equipment

 optionally available

 not available



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