One used SOTAX Tablet Hardness Tester, 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