Testo 535 CO2 Air Quality Meter

In stock


Testo 535 CO2 Air Quality Meter is a co2 measuring instrument that monitors indoor air quality. This Air Quality Meter has a 2-channel  infrared sensor that allows long-term measurements and does not require repeated adjustment.

Applications: Clean rooms, HVAC, Workplace, etc.

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Testo 535 CO2 Air Quality Meter has a high-precision, long-term stable, 2-channel IR sensor that measures the CO2 concentration in the ambient air. The 2-channel infrared sensor is maintenance-free and can be used for long-term measurements. The readings from such measurements can be analyzed using min/max and average values which can be displayed at the touch of a key. The optional Testo turbo printer can provide you with measuring data printouts that include both the time and date while you are still on site. And the optional topsafe protective cover protects your meter against impact and dirt and water ingress.

Features of Testo CO2 Air Quality Meter:

  • Highly accurate CO2 measurement
  • Long-term stable 2-channel infrared sensor
  • Long-term monitoring to the max. and mean value calculation
  • No necessity for repeated adjustments.

Additional information

Weight 1.5 kg


Model No


Measuring Parameters

Carbon Dioxide

Measuring Range

0 to +9999 ppm


±(75 ppm CO2 +3% of mv) (0 to +5000 ppm CO2) ±(150 ppm CO2 +5% of mv) (+5001 to +9999 ppm CO2)


1 ppm

Operating Temperature

0 to 50 °C

Storage Temperature

-20 to 70 °C


LCD, 2 lines

Auto Shutoff

10 min


9V block battery

Battery Life

6 Hours

Housing Material



2 Years Manufacturing Warranty


190 x 57 x 42 mm


300 Grams

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