Testo-Straße 1
DE 79853 Lenzkirch
Products and innovations

The new climate measuring instrument testo 440: Versatility in a compact design

The new climate measuring instrument testo 440: Versatility in a compact design

Welcome to a new era: the new testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a comprehensive selection of air velocity & IAQ probes. Use it to keep all your air conditioning and ventilation measurements safely and reliably under control.

  • Intuitive measurement menus
    Clearly structured menus for volume flow, K factor, degree of turbulence, heating/cooling output, mould detection and long-term measurement are programmed into the instrument.
  • Wireless convenience
    All the testo 440 probes are also available as wireless Bluetooth versions.
    This makes for less cable clutter in the measuring case.
  • Clear display
    Measurement configuration and display of readings and measurement results at a glance.
  • Particularly cost-effective
    Save money when using the testo 440: the measuring instrument does not need to be calibrated, it measures all air velocity & IAQ parameters and the probes can be flexibly extended.

Company profile

Testo with its headquarters in Lenzkirch in the Black Forest, is a world market leader in the field of portable and stationary measurement solutions. In 33 subsidiary companies around the world, 2,700 employees research, develop, produce and market for the high-tech company. The measurement technology expert convinces customers worldwide with highly precise measuring instruments and innovative solutions for the measurement data management of tomorrow. Products from Testo help to save time and resources, to protect the environment and the health of humans, and to increase the value of goods and services.


An average annual growth of over 10 % since founding in 1957, and a current turnover of more than a quarter of a billion Euros impressively demonstrate that the Upper Black Forest and high-tech systems go perfectly together. The above-average investments in the future of the company are a part of Testo's recipe for success. Testo invests about a tenth of the annual turnover in Research & Development.