Testo 535

CO2 measuring instrument with fixed probe incl. battery and calibration protocol

testo 535, the efficient CO2 measuring instrument for measuring indoor air quality. Bad air quality in rooms can lead to tiredness, lack of concentration and illness (Sick Building Syndrome) due to high CO2 concentration (greater than 1000 ppm)

• Long-term monitoring based on maximum and mean calculation
• Long-term stable 2 channel infrared sensor
• Highly accurate, highly efficient
• Repeated calibration is unnecessary

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