For assessing indoor air quality: use the probe (with the compatible measuring instrument) to measure CO₂ concentration, humidity and air temperature.

For assessing indoor air quality: use the probe (with the compatible measuring instrument) to measure CO₂ concentration, humidity and air temperature. The readings are transmitted directly to your measuring instrument via Bluetooth, making your measurements particularly convenient.

More applications, less equipment: if you already own one of our probes with a universal handle, you can easily expand your portfolio of probes with the CO₂ probe head.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;">Product no longer available. Have you checked out its successor? Why not enjoy the benefits that it has to offer: <a href="…/p/0632-1552">>> To the product (fixed cable)</a> <a href="…/p/0632-1551">>> To the product (wireless, with Bluetooth)</a> Please note that the successor products are only compatible with testo 400 or testo 440.</div>

Kit for evaluating the indoor air quality. The testo 440 air velocity and IAQ measuring instrument and the CO2 probe with Bluetooth&reg; including temperature and humidity sensor are all safely stowed away in the case. So you can get down to work straight away!

Use this practical Indoor Comfort ComboKit to handle all relevant measurements in order to evaluate the indoor air quality in indoor areas and to determine the draught risk and degree of turbulence in workplaces. The testo 440 air velocity and IAQ measuring instrument, the CO2 probe with Bluetooth&reg; including temperature and humidity sensor and the turbulence probe are all safely stowed away in the case. So you can get down to work straight away!

The testo 162 IAQ online data logger is an easy-to-use climate logger with display for monitoring temperature, humidity, CO2 and atmospheric pressure with an integrated sensor. The testo 162 online data loggers are part of the testo 160 online data logger system consisting of the hardware components (testo 160, testo 162, testo 164) as well as the testo Saveris Cloud and testo Smart App. The testo Saveris Cloud is the central data platform. Measured values can be viewed and analyzed there.The Testo Data Monitoring license is required to use the system.

Ideal kit for IAQ professionals, with a focus on indoor air quality and comfort 
level. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one CO2 probe (wired), one turbulence probe and one globe thermometer Ø 150 mm (both with fixed cable). Use the measuring tripod to ensure standard-compliant positioning of the probes. In combination with the IAQ data logger, long-term measurements up to 2 weeks can be recorded, even without the IAQ measuring instrument.

Ideal kit for IAQ professionals, with a focus on indoor air quality and comfort level. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one CO₂ probe (with Bluetooth&reg; handle), one turbulence probe and one globe thermometer Ø 150 mm (both with fixed cable). Use the measuring tripod to ensure standard-compliant positioning of the probes. In combination with the IAQ data logger, which is available to order separately, long-term measurements up to 2 weeks can be recorded, even without the IAQ measuring instrument.

The compact CO2 measuring instrument testo 535 is ideally suited for simple, fast and precise determination of carbon dioxide content to ensure indoor air quality and thus health and performance. The connection to the testo Smart App enables configuration, display (also as second screen) and storage as well as documentation of the measured values directly in the App.

This ISO calibration certificate certifies that your measuring instrument or probe is calibrated. Calibration is carried out according to the ISO standard.

General technical data	Product-/housing material paper
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ISO CO2 calibration certificate - with 3 measuring points

ISO CO2 calibration certificate - with 3 measuring points

General technical data

General technical data