Model GPT-332N GPT-335N GTS-336N 
 As the telescope 
 Length 150mm 
 Objective lens aperture 45mmEDM: 50mm 
 30x magnification 
 Minimum sight distance 1.3m 
 Distance measurement 
 Measurement range 
 Single prism 3,000 m 
 Prism 4,000 m 
 Accuracy ± (2mm +2 ppm × D) 
 Measuring time 
 Fine measurement mode 1mm: about 1.2 seconds (for the first time about 4 seconds) 
 0.2mm: 2.8 seconds (for the first time about 5 seconds) 
 Coarse measurement mode 1mm: 0.4 sec (for the first time about 3 seconds) 
 Tracking mode 10mm: about 0.4 seconds (for the first time about 3 seconds) 
 Meteorological correction has 
 Prism constant correction has 
 There are two error correction 
 Angle measurement 
 Sampling of the diameter / radial unilateral / unilateral unilateral / unilateral 
 Minimum reading 5 "/ 1" 
 Precision 2 "5" 6 " 
 Tilt Compensator 
 Type biaxial 
 Compensation Range ± 3 ' 
 Level of sensitivity 
 Circular level 10 '/ 2mm 
 Long spirit level 20 "/ 2mm 40" / 2mm 
 Other 
 Dust / waterproof rating IP54 
 Operating temperature -20 ℃ ~ +50 ℃