Testo India Pvt. Ltd.
Testo India Pvt. Ltd.

Air Velocity Measuring Instruments

CO2 Measuring Instrument with Fixed Probe Inclusive Battery and Calibration Protocol

Humidity Temperature Measuring Instrument
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Model ID: Testo 535

Testo 535 - Indoor air quality can be efficiently measured using this CO2 measuring instrument. Tiredness, lack of concentration and illness (Sick Building Syndrome) can be caused by bad air quality in rooms due to high CO2 concentration (greater than 1000 ppm) which can be avoided by keeping a constant check on the indoor air using Testo 535.




  • Long-term stable 2 channel infrared sensor
  • Repeated calibration not required
  • Long-term monitoring based on maximum and mean calculation
  • Highly accurate and efficient

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