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The Assmann Psychrometer APS-1 is a precise and reliable instrument designed for
measuring air temperature and relative humidity.

It is well suited for both professional and
educational applications where accurate and repeatable measurements are required.

A key feature of the APS-1 is its backlit thermometers, which allow clear and easy reading
even in low-light conditions. In addition, the instrument is lightweight, making it comfortable
to hold and operate over extended periods of time without causing fatigue.

The air inlets located at the thermometer tips are equipped with integrated radiation shields.
These shields reduce the influence of external radiant heat and help ensure that the
thermometers measure the true air temperature rather than being affected by environmental
radiation.

Furthermore, the thermometers are laterally protected against direct radiation and
mechanical damage. This protective design improves measurement stability and increases
the durability of the instrument during field use.

To further enhance measurement accuracy, the thermometers are thermally isolated from
the housing and the air inlet tubes. This thermal separation minimizes heat transfer from the
instrument itself and prevents distortion of the measured temperature values.

Operation Instruction : MS-APS-1-OI0002.pdf