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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).

Use the testo 420 differential pressure measuring instrument to carry out simple, efficient tests on filters. You can also use the measuring instrument in conjunction with a Pitot tube to measure flow velocity and volume flow really easily in ventilation ducts.

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Small, handy and practical: the testo 511 absolute pressure meter measures absolute pressure and is also suitable for measuring the barometric altitude between two points.

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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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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.

The testo 400 is the universal measuring instrument for all IAQ professionals. Measure, analyze and document all IAQ and comfort level parameters using just one instrument – simply, conveniently and in compliance with the standards. High-quality measuring technology, intuitive measurement assistants, versatile documentation options and a comprehensive selection of IAQ probes make the testo 400 the perfect partner for your day-to-day work.

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.

Ideal kit for IAQ professionals, with a focus on indoor air quality and comfort 
level. <br/><br/>You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one CO<sub>2</sub> 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 air flow measurement. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one vane probe head (Ø 16 mm), one vane probe head (Ø 100 mm) and one high-precision humidity/temperature probe head – all three can be attached to the Bluetooth<sup>&reg;</sup> handle supplied. For measurements at ceiling outlets, simply combine the 100 mm vane probe with the telescope (can be extended up to 1.0 m) and the 90° angle.

Ideal kit for IAQ professionals, with a focus on air flow measurement. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one hot wire probe head (including temperature and humidity sensor), one vane probe head (Ø 100 mm) and one high-precision humidity/temperature probe head – all three can be attached to the Bluetooth<sup>&reg;</sup> handle supplied. For measurements at ceiling outlets, simply combine the 100 mm vane probe with the telescope (can be extended up to 1.0 m) and the 90° angle.

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

Product-/housing material	paper
Product colour	white

ISO pressure calibration certificate - with 5 measuring points

ISO pressure calibration certificate - with 5 measuring points

General technical data