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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.

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

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

When ambient conditions, for example in a laboratory, need to be documented securely and highly accurately, the testo 176 P1 is the right data logger. It has an integrated absolute pressure sensor and connection possibilities for two external temperature/humidity probes (optional).

Kit for evaluating the indoor air quality. The testo 440 air velocity and IAQ measuring instrument and the CO<sub>2</sub> probe with Bluetooth<sup>&reg;</sup> 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 CO<sub>2</sub> probe with Bluetooth<sup>&reg;</sup> 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!

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available. Have you checked out its successor?<br/>Why not enjoy the benefits that it has to offer: <a href="…/p/0563-1512">>> To the product</a></b></div>

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The high-precision testo 521-1 differential pressure measuring instrument is ideal for accurate differential pressure measurements in air conditioning and ventilation technology, for instance for pressure drop on filters, checking fans and extractors or for Pitot tube measurements.

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<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available. Are you familiar with the alternative?<br/>Why not enjoy the benefits that it has to offer: <a href="…/p/0563-1512">>> To the product</a></b></div>

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The testo 526-2 high-precision differential pressure measuring instrument is ideally suited for checking pressure in sensitive industrial processes, thanks to a measuring accuracy of &plusmn; 0.05% of final value. Two additional pressure and temperature probes can also be attached.

Use the testo 190-P1 CFR pressure data logger for efficient monitoring of sterilization and freeze-drying processes. Designed for the pharmaceutical industry, the testo 190-P1 CFR data logger is ideally suited for tightness or overpressure testing in autoclaves and freeze-drying systems.

Use the testo 191-P1 HACCP pressure data logger, which is certified by HACCP International, for efficient monitoring of pasteurization and sterilization processes. Designed for food production, the testo 191-P1 is ideally suited for efficient saturated steam pressure testing in pasteurization and sterilization processes.

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<sup>&reg;</sup> 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.

With the compact differential pressure measuring nstrument testo 512-1 (0 to 200 hPa) you have the ideal solution for simple, fast and precise measurement of gas flow and static gas pressure on heating systems, for checking filters on air conditioning systems and for Pitot tube measurement in ventilation ducts. The testo Smart App supports you with useful functions such as configuration, display (also as second screen) and storage as well as documentation of the measured values directly in the App.

With the compact differential pressure measuring instrument testo 512-2 (0 to 2000 hPa) you have the ideal solution for simple, fast and precise measurement of gas flow and static gas pressure on heating systems, for checking filters on air conditioning systems. The testo Smart App supports you with useful functions such as configuration, display (also as second screen) and storage as well as documentation of the measured values directly in the App.

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

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DAkkS pressure calibration certificate - with 9 measuring points

DAkkS pressure calibration certificate - with 9 measuring points

General technical data

General technical data