System information


Block load cells comprise a cast housing for adaptation to the customer's machine and a mounting plate to accommodate the pedestal bearing. The tension sensor is a double bending beam to which the strain gauges are applied, as a result of which an analogue measured signal proportional to the web tension is output.

Area of use

Block load cells are used for web tension control in practically all production plants where web-type materials are processed or finished. Above all, in the area of converting, they offer significant advantages, since the pedestal bearings are very accessible and the rolls can be easily replaced.


A horizontal mounting position with symmetrical wrapping between 60 and 180° to the vertical measuring direction is preferred. Measurement of the web tension on both sides by the tension sensor prevents incorrect measurements caused by sideways movement of the web and asymmetrical web tension distribution. Load cells incorporated in a closed loop must be positioned as near to the actuator as possible.



F = Web tension (N) | F1 = Force component 1 in measuring direction | F2 = Force component 2 in measuring direction | FG = Weight force | α = Angle between departing web and measuring direction | β = Angle between incoming web and measuring direction | FR/K = Resulting force on a block load cell

Block load sensor systems

Block load cell PD 50

Large measuring range thanks to the resolution of 1:25

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System components

Analog measuring amplifier CV 22

Single-channel measuring amplifier for connecting two fabric tension sensors to a strain gauge bridge

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Digital measuring amplifier with display PA 62

Digital two-channel measuring amplifier for connection of 2 fabric tension sensors with a strain gauge bridge

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Web tension controller DC 62

Compact, digital web tension controller for different control structures including color touch-display

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