Product Name: Optical Plummet Twist Focus Tribrach - Yellow for GPS base Stations, Theodolites and Total Stations Model NO.: AJ13(D1) Optical Plummet: 3X Magnification Sighting Distance: 0.3m to 15m Color: Yellow base: 5/8 X 11 Transport Package: Standard Export Carton Specification: SGS Origin: Jiangsu, China HS Code: 90159000 Product Description Topcon Type Tribrach with Optical Plummet AJ13(D1)Optical Plummet Twist Focus Tribrach - Yellow for GPS base stations, theodolites and total stations.High-quality tribrach features an optical plummet and 3X magnification and a twist focus. Its reticule is composed of two small concentric circles. With a sighting distance of 0.3 m to 15 m, accuracy of 0.5 mm per 1.5 m. A locking forced-centering knob, a 5/8 x 11 base and an 8-minute circular vial. Color: Yellow.PURPOSE OF THE TRIBRACHThe tribrach enables surveying equipment to be levelled and centred over a benchmark. To achieve accurate measurements, the tribrach must ensure a firm connection between the tripod head and mounted instrument.The stability of the tripod and tribrach is the primary influence on the reliability of measurements. The critical factor for accuracy is the provision of a stable platform for the instrument; if the base is unstable the measurements will be unreliable.FEATURES OF THE TRIBRACHOur tribrachs are designed to operate reliably even in extreme temperature, humid and dusty conditions. In all situations, the maintenance-free foot screws ensure a movement that is always smooth and free of play.The support area of the tribrach is matched precisely to the base circumference of Leica Geosystems equipment. This provides extremely accurate forced centring.Even after a long operating life, the quality and precision characteristics are maintained.Product:Workshop Show: