PURPOSE: The titled tensiometer for measuring the interstand total tension or tensile stress which is proveded with the rolling torque arithmetic unit and the tension arithmetic unit, and measures the front tension in the case that only front tension is acting on the just marked stand being free from the back tension.

CONSTITUTION: The rolling torque arithmetic unit 1 receives measured data for the terminal voltage V and current I, the resistance Ra of armature, and the revolution per minute N, of driving motors 11, 12 ... IN, and the rolling torque Gf for the case that the tension is acting, and operates the rolling torque Go for the case of tensionless pass depending on the formula I: the tension aritmetic unit 2 operates the position Xn at which the speed of material transportation in the roll feed coincides with the circumferential speed of reduction rolls 11, 12 ... 1N, and ΔGf= Gf -Go from the operational result of the unit 1, the diameter R of the reduction roll, the measured data Qf by the rolling load detectors 21, 22 ... 2N, and the rolling load variation ΔF depending on the well-known theoretical formula for the rolling reduction, and operates the tension from those data depending on the formula II: hereby, the front tension of the just marked stand is measured for the case that only the front tension is acting.