<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available.</b></div>

<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 that it has to offer:<br/> <a href="…/p/0628-0152">>> To the product</a><br/> Please note that the successor product is 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).

<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="https://www.testo.com/400">>> To the product</a></b></div>

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.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Izdelek ni več na voljo. Ali že poznate naslednika?<br/>Izkoristite prednosti: <a href="…/p/0563-1512">>> Do izdelka</a></b></div>

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Izdelek ni več na voljo. Ali že poznate naslednika?<br/>Izkoristite prednosti: <a href="…/p/0563-2512">>> Do izdelka</a></b></div>

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.

<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:<br/> <a href="…/p/0560-5210">>> To the product</a><br/>

<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>

<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:<br/> <a href="…/p/0560-5281">>> To the product</a><br/>

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.

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 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.

S kompaktnim instrumentom za merjenje diferencialnega tlaka testo 512-1 (0 do 200 hPa) dobite idealno rešitev za preprosto, hitro in natančno merjenje pretoka plina in statičnega tlaka plina v ogrevalnih sistemih, za preverjanje filtrov na klimatskih sistemih in za merjenje s Pitotovo cevjo v prezračevalnih kanalih. Aplikacija testo Smart vas podpira z uporabnimi funkcijami, kot so konfiguracija, prikaz (tudi kot drugi zaslon) in shranjevanje ter dokumentacija izmerjenih vrednosti neposredno v aplikaciji.

S kompaktnim instrumentom za merjenje diferencialnega tlaka testo 512-2 (0 do 2000 hPa) dobite idealno rešitev za preprosto, hitro in natančno merjenje pretoka plina in statičnega tlaka plina v ogrevalnih sistemih, za preverjanje filtrov na klimatskih sistemih. Aplikacija testo Smart vas podpira z uporabnimi funkcijami, kot so konfiguracija, prikaz (tudi kot drugi zaslon) in shranjevanje ter dokumentacija izmerjenih vrednosti neposredno v aplikaciji.

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