SOTAX Model HT 1 measures tablet thickness, diameter or length, width and hardness. The unit is equipped with an auto alignment device to automatically align correctly the tablet for proper measurements. Measurement Range Hardness 5 – 500 (+/-1 N), Accuracy 500 – 1000 N (+/-2 N), Diameter/Length 0.00 – 30.00 mm (0.00 – 1.2 in), Accuracy +/-0.05 mm. Unit Comes complete with Epson Printer.