User interface of the measuring software

Software for measuring the wall deviation (declination)

Helios Sonnenuhren
Dr.-Ing. Carlo Heller
PC software for recording measurement series for measuring wall deviation (declination). For the date and time of the PC clock, the wall deviation is calculated at the time of measurement from the azimuth of the sun and from the measured value of the shadow angle. For Windows XP, 7 or 10.
24,50 € incl. VAT
available from stock
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  • 2 weeks statutory right of return (customised products excluded)
  • Hotline: +49-611-185 11 06


Here you will find all you need to construct your own wall sundial.

Sundial calculation as a table with small scale sundial diagram. Please give address details (street, town), wall deviation (declination) and size of the sundial when ordering.

Adjustable gnomon for installation in the house wall. Standard length is 800mm. Custom-made available.

Fixable inclinometer for precise adjustment of the latitude of equatorial sundials. Also ideal for the adjustment of the gnomon of a vertical or a horizontal sundial. Gnomon diameter 4-12mm. Generally also suitable as a inclinometer for other purposes.

Measuring table to measure the wall deviation (declination) by the Sun.  Including software for your computer or laptop (Windows 10 or older). The latter can be purchased separately. The wall deviation or declination is the angle, that a wall's perpendicular makes with due south (i.e. a wall facing S has d=0°). Walls declining westward have positive declinations, those eastward, negative.

We can work out the wall deviation (declination) using a cadastral map your house or Google Maps.


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