The STM-50 Screen Tension Meter is designed to measure how taut a woven material is when tension has been applied in two directions at right angles to each other, as in the case of a screen printing frame.

Its operating principle is similar to that employed by the CHECKLINE Durometers, except that it is fitted with a one-inch bar indentor placed midway between two outer "reference" bars spaced two inches apart, instead of an indentor ball. When the instrument is placed on the material, the greater the tension, the more the bar will be pushed in, and the greater the reading on the scale.

STM Tension Meter is calibrated on custom calibration fixture to ensure highest accuracy and repeatability.