Prices and Technical Information for Buyers

Sawyer Equant: $2,100. It can be installed at any location from 23 to 51 degrees Latitude (Northern Hemisphere only), covering the 48 contiguous United States, much of Europe, and some of Canada and Mexico. This means that unlike most precision dials, if you move you can take it with you. Presently there is no model for latitudes outside this window, nor for the Southern Hemisphere, but will consider adding one if there is sufficient interest. Choice of granite color varies with availability, and is currently available in African Red, Laurencian green, and Vermillion pink. Its silicon bronze alloy (CDA65500) is commonly used in high quality outdoor sculpture and in marine applications and should endure beautifully for many, many years. It is not lacquered, so as to allow natural darkening due to exposure. All graphics are permanently etched into the surface of the bronze, and permanently sandblasted into the granite, followed by paint-filling. Download Owner's Manual (Sawyer Guide.doc)

Renaissance: $8,000. Range of latitude is identical to the Sawyer Equant, except that each helical time band is custom etched for the user's longitude. Because each is designed for a particular location, it is not readily transferable to a new one. It weighs approximately 95 pounds, requiring a sturdy wall, pedestal, or plinth. It easily and directly reads standard and daylight savings time with astonishing precision, but the mathematics of its design limits its use from about 5 hours before solar noon, to about 5 hours after solar noon, as the focused image fades beyond these extremes. However, this works well for most locations, because in the early morning and late afternoon horizon obstructions tend to limit the usefulness of most dials anyway. This dial is a derivation of the equatorial type of dial, with some notable differences. Equatorial dials are not usable on the equinoxes, being blocked by their own shadows. In contrast, the Renaissance, by using a helical time band, does not block itself in this manner and functions beautifully on the equinoxes. Rather, there are one or two times in every day, lasting a few minutes, that the image is completely blocked by the helix's own shadow, or by the gap in the focusing mirrors. For a longer period, up to two hours, the image appears truncated, being only partly eclipsed by the helix shadow or mirror's gap. The time is fully readable during this period, but the image does not extend fully across the width of the band. Because the mirrors are made of uncoated high index glass, there is no coating to wear off over time. Nonetheless, they project a focused line of light that is 2 minutes of time wide, the same as the sun in the sky. The geometry of the mirror and the dial is such that the image remains in sharp focus at all times. The dial is cast from silicon bronze, except for the hoop which is extruded from Naval Brass. As with the Sawyer Equant, both of these alloys will darken over time and enjoy excellent corrosion resistance. Download Owner's Manual (Renaissance Guide.doc)

Schmoyer Sunquest: $3,000 in Marine Grade Aluminum-Magnesium alloy, $3,500 in Statuary Silicon Bronze. Range of latitude is 20 to 55 degrees. If you would like the challenge of machining and engraving your own dial, you can buy unfinished sandcast parts and required hardware for $475 in aluminum and $960 in bronze, along with a copy of Richard Schmoyer's original instructions. Tony Moss of Lindisfarne Sundials has made an excellent guide to machining these parts (please note that Tony does not sell this dial). Download Owner's Manual (Schmoyer Guide.doc)

Return Policy: Every sundial is fully guaranteed to meet customer satisfaction. Any sundial can be returned for a full refund (less shipping costs) at any time, provided it is undamaged other than customary weathering and aging.

Software from Precision Sundials: Precision Sundials had designed several free computer programs to help sundial enthusiats. All can be downloaded from our software page:
SundialAlign helps you determine how to accurately adjust your sundial to read Solar Time, Standard Time, or Daylight Saving Time. It uses a method which corrects misalignment by utilizing feedback from an existing dial set up. It interprets erorrs between the sundial and the watch, and then calculates exactly how to adjust the dial to achieve nearly perfect time keeping. Errors of alignment are the largest factor contributing to incorrect readings of well made sundials: 1 degree of error can cause up to 4 minutes of inaccuracy.
WallDeclination uses an accurate and easy method to measure the declination of a wall for a vertical sundial.
CardinalDirections uses an accurate and easy method to lay down an exact north-south or east-west line for sundial placement and construction.

Email to: Bill Gottesman, managing member


Updated April 14, 2011