Ventilation and indoor air quality analysis

Indoor air quality checks provide information about whether employees are working in an agreeable climate.

The testo 435 provides the possibility of analysing and adjusting indoor air quality. The probe for indoor air quality (IAQ) measures the parameters CO2, % relative humidity and indoor air temperature. Pressure and indoor air speed are parameters that can also be measured. The Lux probe measures the light conditions in the place of work and also the repetition frequency of screen monitors. Dewpoint exceedances and mould growth are examined with the surface probe and the air humidity probe.

Temperature and humidity measurement are integrated in the thermal probe. Flow speed, volume flow, air humidity and air temperature can thus be measured in one test run. Different measurement principles can be used depending on the flow speed and application: hot wire probe (0-20 m/s) for precise measurement of low speeds; 16 mm vane probe (0.6-40 m/s) broad measuring range; 60 mm vane probe (0.25-20 m/s) for integrating measurement, eg, at ducts; integrated differential pressure probe; and simple pitot tube measurement, suitable for high air speeds and impure air.

The unit is simple and efficient to use. The instruments can alternate between user profiles, similarly to a mobile phone, for the applications channel measurement and IAQ measurement.

The measurement reports provide the user with the data from channel measurement, long-term measurement and turbulence measurement. The company logo can be integrated into the form.

The availability of measuring instruments is a deciding factor. The costs are huge if work cannot be continued because measuring instruments are not available. A carrying strap enables safe transportation and a magnet ensures good handling during flow measurement.

It is available in four versions. Depending on the demands of the application, it is offered with or without built-in differential pressure measurement and instrument store, PC software and with different probes for different applications.