Sokkia's PL1 is the product of extensive experience in the field of high technol ogy and sophisticated instrument making. The PL1 First Order Precision Level was developed after long and thorough research into every aspect of use under all possible working conditions.
The PL1 has been subject to strict quality control to ensure high accuracy and ease of use.The combination of a tilting mechanism with a sensitivity of 10"/2 mm, a coincidence type observa tion mechanism, and an optical microm eter with a direct reading of 0.2mm, combine to guarantee precise levelling and accurate measurement.
Tilting screw mechanism for fine adjustment of line of sight
The tilting screw used to level the line of sight is engraved with graduations that accurately indicate the inclination, and index lines that indicate the number of turns of the tilting screw. The tilting screw is divided into 50 equal divisions, each division equalling 2" of inclination.
Coincidence type optics give sharp bubble image
Innovative optical design has been used in the coincidence bubble reading optics to ensure a sharp image of the bubble which is magnified to twice normal size. The mark that appears on the bubble image quickly indicates the direction in which the tilting screw is to be turned to achieve coincidence.
Optical micrometer allows precise reading
The PL1 is equipped with an optical micrometer, which enables staff gradua tions to be subdivided directly to 0.1mm, and to 0.01mm by estimation. The micrometer knob is turned until the graduation line on the staff bisects the wedge-shaped reticle lines of the PL1 telescope. The shift is numerically dis played in the optical micrometer win dow, and this reading is added to the staff reading to give direct reading accuracy to 0.01mm.
Wedge shaped reticle for precise reading
The high resolution telescope, which gives a sharp image of the target, is provided with a wedge-type reticle to read staff graduations more accurately. The distance to the staff can be easily obtained by using the stadia lines.
Optical wedge provides easy and fine adjustment of line of sight
The adjustment to the line of sight is simple. It is not necessary to adjust screws on the tubular level. Simply turn the optical wedge until the line of sight is horizontal to get exact results.
To purchase this instrument or accessories, please contact the sales team on 0191 549 8276 or email sales@pglsurvey.com