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Spot-on Sundials - contemporary, scientifically accurate* sundials


The original Spot-On Sundial in brass

The main feature of the Spot-On Sundial is the divided gnomon* constructed of two parallel plates with a small air gap. This permits a ray of sunshine to pass through for a few minutes at solar noon.

This makes it easy to set up from a table supplied with the sundial. It also gives an "event" (like the noon cannon without the cannon!) each day.

As one of our early customers said "It's like having your own private Stonehenge in your garden".

The Spot-On Sundial can be used indoors or out.

The rotating dial plate allows the use of the dial on an indoor window-sill; the baseplate is pushed against the window frame, and the dial plate rotated so the sun shines through the slit on the centre line at solar noon. The centre screw is then screwed down to hold it in position.

For use outdoors, a level plinth is established, the baseplate is screwed down to the plinth, the rotating dial plate set on the baseplate, aligned exactly at the next convenient solar noon, and the screw tightened to hold it in position, as described in our setup page.

The design is copyright © Piers Nicholson, 2019

Feature List

  • Precision-made
  • Solid brass construction
  • Easy to set up
  • Can be personalised with an engraved message on the side of the gnomon* to give a unique gift for an anniversary, birthday, wedding, or special event
  • "Line of light" at every noontime
  • Concealed fixings
  • Marked in Roman numerals for winter time, and Arabic for summer time
  • 17 cm. square, 12 cm. overall height, weight 4.3 lb.
  • Optional circular baseplate
  • Designed for use indoors or outdoors
  • Complete set-up instructions
  • Can be read to an accuracy of two minutes or less
  • Every sundial individually numbered.
  • More pictures of the Spot-On Sundial


17 x 17 x 12 cm. high
(6.7 x 6.7 x 4.7 ins. high)

Weight: 4.75 lb. (2.1 kg)

Suitable for the private
gardens and courtyards

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Circular Option , the optional circular baseplate gives a wider range of choice to fit the your particular requirements, more details


*The gnomon is the upright part of the sundial which casts the shadow. It is derived from the Greek word meaning indicator; the g is silent, so it is pronounced "no-mon" with the first o long.


Spot-on Sundials, London, United Kingdom
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