The testo 435-2 indoor air quality meter is designed to allow you to carry out all the measurements that are necessary to check and adjust ventilation and air conditioning systems and assess the quality of the indoor air.

But who knows better than you what your meter needs to be able to do? Below you will find a wide selection of optionally available probes and sensors that give you the freedom to configure your meter just the way you want it. Order your probes and sensors along with your meter now.

Connectable sensors (optional) for assessing the indoor air quality (IAQ)

• IAQ sensor for assessing the indoor air quality using CO2, air temperature, relative humidity and absolute pressure measurements
• Comfort sensor for degree of turbulence measurements in compliance with EN 13779 for the objective assessment of the air velocity in the relevant room
• Globe thermometer for measuring radiation heat
• Lux sensor for measuring illumination
• Moisture/temperature sensor for assessing the thermal comfort in the relevant room
• CO environmental sensor for measuring CO in rooms and buildings
• Temperature sensor for immersion, penetration, air and surface measurements
• Temperature sensors to determine the HTC value
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Connectable sensors (optional) for checking and adjusting ventilation and air conditioning systems

• Thermal anemometer, also with integrated temperature and relative humidity measurement function for air velocity and volume flow rate measurements in ventilation ducts
• Impeller anemometer with small diameter ( 16mm) for air flow and volume flow rate measurements in ventilation ducts
• Impeller anemometer with large diameter ( 100mm) for  air flow and volume flow rate measurements at air outlets in connection with the testovent 417 funnels also for carrying out measurements at disk valves and ventilation grilles or for carrying out measurements at ceiling diffusers using a volume flow rate rectifie