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;"><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>

Professional measuring technology in a small format: the compact testo 410i vane anemometer with smartphone operation measures the volume flow, air velocity and temperature at air outlets quickly and reliably. The testo Smart App enables readings to be viewed conveniently and offers intelligent additional functions.&nbsp;

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!

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.

The professional and compact testo&nbsp;549i high-pressure gauge can be controlled via the testo&nbsp;Smart App using your smartphone or tablet, and is ideal for carrying out servicing and troubleshooting on air conditioning and refrigeration systems. The App also enables evaporation and condensation temperatures to be calculated automatically.

For refrigeration engineers: Compact kit containing testo&nbsp;549i high-pressure gauge and testo&nbsp;115i clamp thermometer (two of each). Used in conjunction with your smartphone/tablet, the kit is ideal for servicing, troubleshooting and installing air conditioning and refrigeration systems. The testo&nbsp;Smart App makes your work easier and more efficient: over 90 stored refrigerants, automatic calculation of superheating/subcooling, emailing of measurement data reports as PDF or Excel files.

For refrigeration engineers: The kit contains two testo&nbsp;549i high-pressure gauges, two testo&nbsp;605i thermohygrometers and two testo&nbsp;115i clamp thermometers. Used in conjunction with your smartphone/tablet, the kit is ideal for servicing, troubleshooting and installing air conditioning and refrigeration systems. The testo&nbsp;Smart App makes your work easier and more efficient: over 90 stored refrigerants, automatic calculation of superheating/subcooling, target superheat and cooling/heating power, emailing of measurement data reports as PDF or Excel files.

<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/0563-0002-32">>> To the product</a></b></div>

Ultimate kit for all-round engineers in the field of heating, air conditioning, refrigeration and ventilation: The kit contains all the testo Smart Probes and is ideal for carrying out functional checks or for plant maintenance, in conjunction with your smartphone/tablet. The testo Smart App enables you to work more easily and efficiently: Automatically calculate numerous parameters such as superheating/subcooling, target superheat, cooling/heating power or differential temperature. Measurement data reports can be emailed directly as a PDF or Excel file.

For air-conditioning engineers: Compact kit containing four measuring instruments for your most important measuring tasks in, on and involving air conditioning systems. The testo&nbsp;Smart App enables you to work more easily and efficiently: Use intuitive measurement menus for volume flow measurement, for automatic calculation of the dew point and wet bulb temperature or for detecting areas susceptible to mould according to the traffic light principle. Measurement data reports can be emailed directly as a PDF or Excel file.

This certificate documents the ISO calibration of your measuring instrument/probe. Calibration is carried out at 3 measuring points, distributed over the measuring range of the measuring instrument/probe.

Product-/housing material	paper
Product colour	white

ISO calibration certificate for pressure - with 3 measuring points

ISO calibration certificate for pressure - with 3 measuring points

General technical data