Newheek has three x ray collimator NK202 for 150 KV spherical tubes, and collimator NK103 and NK202 for 125 KV tubes.
Firstly, comparing the size of the collimator NK103 and NK202, the shape size of NK103 (WLH) is 158 mm x 138 mm x 83 mm, and that of NK202 (WLH) is 185 mm x 198 mm x 145 mm. Compared with NK202, the weight of collimator NK103 and NK202 is 2.6 kg and 6.8 kg respectively. In appearance, NK103’s dashboard knob is on different sides, NK202’s dashboard knob is on the same side. NK103 is suitable for 125 KV tube, while NK202 is suitable for 150 KV tube. The maximum field of NK103 was 430 mm x 430 mm (SID = 90 cm), and that of NK202 was 440 mm x 440 mm (SID = 100 cm). The average field brightness of NK103 is more than 100 lux, and that of NK202 is more than 160 lux. The contrast of NK103 was > 3:1, and that of NK202 was > 4:1.