Description:
- Object ID: ALSA 2008.03.21
- Made by: Tellurometer (PTY) Limited
- Model: CD6
- Serial Number: 1939
- Date Made: Circa 1975.
- Approximate size: 64cm (l) X 40 cm (w) X 20 cm (h)
- Accessories:
Tan (white in image) metal adapter for attaching the CD6 to a WILD T2.
Black and grey power cable for attaching the battery pack to the CD6.
Black film container holding earphones for plugging into the side of the CD6 to hear the audio signals.
A rechargeable battery pack in a leather case.
A 110 volt charger.
A car battery cable.
Two metric Allen wrenches.
A black round plug in audio speaker 4 cm diameter X 2.5 cm length (not shown in image)
A tin and plastic fuse case with four fuses inside.
A file folder with 4 sales brochures for the CD6, price list, 3 meteorological correction charts, 2 operator’s manuals in the top of the case lid behind the foam insert.
- Condition: Good
Commentary:
The CD6 is a small, lightweight infra-red instrument operating over distances up to 2km with an accuracy of +/-5mm +2ppm. It could be used by itself mounted on a tripod or mounted on top of a theodolite.
Unlike the original microwave Tellurometers that required a pair of instruments (master and remote), the CD6 used a reflector to return the signal, meaning only one active instrument was needed. It has two large lenses, situated side by side, on the front. One lens was used to send the signal, the other to receive it from the reflector. It also has a sighting scope mounted on the side of the instrument. The sighting scope is marked ‘ BUSHNELL 4X CUSTOM 22.”
The CD6 along with its accessories is stored in a blue plastic case.
It was used by Kinloch Underwood and Associates Ltd for legal land survey work in Alberta.
Source of Object: Donated by Monroe Kinloch ALS (Hon. Life).
Notes: The Society has only one in their collection.
References: Visit article “The Skill of Chaining would be lost” – The Tellurometer and Sturman and Wright, The History of Tellurometer for additional information.
Description by: Ed Titanich, November 25, 2024 and Gordon Olsson, January 4, 2026.