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  5. BZ25 CO2 air quality monitor

BZ25 CO₂ Air Quality Monitor

Reliable measurement of the indoor air quality

We spend more than 90 % of our life indoors. Besides, with building structures growing closer and closer together, exhausting pollutants are increasingly impeded with noticeable consequences for the air quality.

Increased concentrations of carbon dioxide – even when they are still within the permissible limit values – can not only lead to fatigue, lapse of concentration or performance loss, but further cause serious health problems especially for children or enfeebled persons.

Using the BZ25, the indoor air quality can reliably be monitored – the ideal air quality monitor for use in work, living or children's rooms, class rooms, kindergartens or office and production environments.

Thanks to the accurate and permanently stable NDIR measurement method, the BZ25 in addition to air temperature and relative humidity also captures the current concentration of carbon dioxide in the room air and indicates these in steps of 1 ppm on the easily legible display.

Additionally, an individual CO₂ alarm limit value can be defined, which when exceeded is indicated by means of an acoustic warning signal.

A practical additional function of the BZ25 is the CO₂ indicator with simple icon presentation of a good, normal or unfortunate concentration of carbon dioxide in the room air on the large LCD display, which further shows time and date.

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
  • 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
  • Free standing or wall mounted
  • Optimum price-performance-ratio


BZ25 CO2 Air Quality Monitoring Device show in Trotec online shop

BZ25 CO2 Air Quality Monitoring Device

Too much CO2 in the air can have a variety of effects, not just fatigue and tiredness, on the occupants of a room. Find out if it’s just the poor air quality that’s putting you, your colleagues or the students in your class to sleep ...

You save: 18.53 £

139.02 £ 120.49 £ incl. VAT
Show net price (VAT not included)



Technical data
General information
  Article number 3.510.205.014
Air temperature [°C]
  Min. measuring range [°C] -5
  Max. measuring range [°C] 50
  Resolution [°C] 0.1
  Accuracy ± [°C] 1
Air temperature [°F]
  Min. measuring range [°F] 23
  Max. measuring range [°F] 122
  Resolution [°F] 0.1
  Accuracy ± [°F] 1.8
Relative humidity (%)
  Min. measuring range [%] 0.1
  Max. measuring range [%] 99.9
  Resolution [%] 0.1
  Accuracy ± [% RH] 5
Carbon dioxide (ppm)
  Sensor - Carbon dioxide NDIR sensor (nondispersive infrared)
  Min. measuring range [ppm] 0
  Max. measuring range [ppm] 9,999
  Accuracy [ppm] 75
  Accuracy [%] 5
  Resolution [ppm] 1
Device control
  Push buttons
Housing design
Power supply
  External (power adapter)
Surrounding conditions
  Operation - min. temperature [°C] -5
  Operation - max. temperature [°C] 50
  Operation approx. - max. relative humidity (non-condensing) [%] 90
  Storage - min. temperature [°C] -5
  Storage - max. temperature [°C] 50
  Storage - max. relative humidity (non-condensing) [%] 90
  Length (packaging excluded) [mm] 110
  Width (packaging excluded) [mm] 61
  Height (packaging excluded) [mm] 105
  (packaging excluded) [kg] 0.1
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Power adapter
  Operating manual
  Storage case
  Factory test certificate
Ascertainable measured values and functions
Internal sensors
  Relative humidity [%]
  Carbon dioxide [ppm]
  Air temperature [°C]
  Air temperature [°F]
Functions and features
  Minimum value display
  Maximum value display
  Hold function
  Switching function °C/°F
  Backlit display
  CO2acoustic alarm function
  Feel-good indication

 standard equipment

 optionally available

 not available


Alternative products

BZ25 with alternative products:

start comparison
BZ30 CO2 Air Quality Data Logger show in Trotec online shop

BZ30 CO2 Air Quality Data Logger

A complex name for a simple and clever principle: the BZ30 can measure indoor temperature and relative humidity and the CO2 concentration in the air as well as being able to log all this data for future reference. Thus unsupervised long-term measurements are possible.

166.84 £ incl. VAT
Show net price (VAT not included)


BZ05 Indoor Thermohygrometer show in Trotec online shop

BZ05 Indoor Thermohygrometer

At first glance the BZ05 could easily be mistaken for some kind of modern-looking alarm clock. Well it is actually. But in addition to being able to tell you the date and the time the BZ05 indoor thermohygrometer can also accurately measure air temperature and relative humidity.

You save: 35 %

18.49 £ 12.01 £ incl. VAT
Show net price (VAT not included)