Tribrach

Description

Description

The Hand Level is a small, economical level for use with preliminary surveys to determine traveller way or cable way steel work elevations and other feasibility type site reconnaissance work. The Abney Level is very similar to a clinometer in that it is used to measure the value of a slope by means of arc measure and grade percentage.

Specification of Abney Level

• Used to determine slope angle, tree heights etc • Graduated 0-+/-90 degrees, 0-+/-100% on a stationary arc • Vernier reads to 10 • Scale pointer incorporates friction thumb lock • Includes carry case

Description

The Cross-Staff was used at sea from the beginning of the 16th century until the first half of the 18th century. It was used to measure the sun's altitude, especially at the meridian passage. With the knowledge of the sun's declination, the mariner could then obtain his latitude. The staff is original, with the inscription. The cross pieces are replicas. Different cross pieces were used depending on the altitude. A different scale is on each side of the staff.

Description

Rain gauge is designed to measure the precipitation. This small Version consisting of upper and lower housing part, measuring cylinder; Housing made of stainless steel, orifice rim made of brass. Type 7019.0000 can be supplied with a receiving area of 100 cm2. (This type is not conforming to meteorological standards). • Receiving area : 100 cm². • Rain measure (graduated glass) : 250 cm³. • Measuring range : 0 t0 25 mm precipitation (relative to a receiving area of 100 cm²). • Graduation : 1/1 mm precipitation. • Dimensions : dia 115 mm; height 300 mm. • Weight : approx. 0.8 kg.