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Holtwood Marketing Ltd. The Survey Centre, Meridian House, |
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Holtwood Marketing Ltd. The Survey Centre, Meridian House, |
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Wall Socket Systems
REMOVABLE ADAPTERS
| Simple and inexpensive adapter, 30mm stainless steel screw. Cat. No. 5HBolts30 |
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Conical brass measuring head, 20mm greater dia., secured in socket with 3bmm SS screw Cat. No. SHConhead |
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| Stainless steel prism carrier, to take Leica-type prisms. Best used with 11r2-40 Cat. No. HMPCL |
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| Brass levelling insert with 19.8 mm measuring sphere. For use with 11r2-40 Cat. No. HWMON |
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| Stainless steel levelling insert, for use only with the high accuracy socket SOHEX/M8 Cat. No. HWMH50/M8 |
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| Mini-prism in holder, particularly useful for mounting in inaccessible locations. Mounted using either a
5/8" or a Leica adapter depending on type. Cat. No. HWMIN1 |
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M8 SOCKETS
| Brass expansion sleeves for placing in 1 1 - 7 2mm holes. Grubscrew expands the sleeve, epoxy also
recommended Cat. No. Sleeve/40 |
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| Brass expansion sleeve as above, but with PVC coating and flat 30mm PVC facing. Fits into 13-14mm hole. Cat. No. 11 r240 |
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| Brass wail socket for grouting or epoxying into 12mm hole. Cat. No. 11r1 |  |
| 50mm stainless steel socket made from 16mm (5/8") hex. For use with measuring head ref HWMH50/M8 for high-order monitoring. Cat. No. S0HEX/M8 |
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MEASURING HEAD
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M 10 SOCKET
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B.R.E. type sockets and measuring heads. The M 10 wall socket and measuring head shown above are based on the so-called B. R. E. system developed in the mid-sixties at the Building Research Establishment, Watford, by John Cheney. Further details are to be found in the paper he presented to FIG Commission 6 Symposium in London in 1980 "Some Requirements and Developments in Surveying Instrumentation for Civil Engineering Monitoring---.
It should be noted that no specific dimensions are laid down for B.R.E. sockets or measuring heads, and although we offer as standard a 70mm measuring head with a 20mm ball, these can be changed to suit customer requirements. We have changed from a round to a hexagonal socket in the light of customer experiences, and our socket is a little slimmer and shorter to improve ease of installation. All parts are made of stainless steel, machined to very high tolerances
WHEN MONITORING, PLEASE REMEMBER that permanently mounted points will ALWAYS give a more accurate result than demountable ones, and usually at a fraction of the price.
010809
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