The MAGPOWR TR-5 Tension Readout is a device for measuring tension in a moving web, strand, wire or narrow tape. It uses either one or two MAGPOWR load cells and interconnection cables.

This system can be used on any non-driven idler roll or at any position where the wrap angle of the web or strand does not change. Each load cell contains four foil type strain gages bonded to a sensing beam. These gages convert the load on the roll or sheave to an electrical signal. Within the TR-5, the signal from the load cells is amplified and displayed on the tension meter.

The amplifier of the TR-5 has low drift and high linearity, with a gain control range of 8:1 and tare adjustment of 50%. An auxiliary 0 to 10 VDC, or 4 to 20 mADC output is provided for interfacing to other products or systems.



  • Precision tension meter for direct tension readout
  • 8:1 calibration range
  • Tare adjustment of 50% load cell rating
  • Overall system accuracy better than 1%
  • Auxilary 0 to 10 VDC or 4 to 20 mADC output
  • Operates with either one or two load cells
  • Easy to install and calibrate
  • Improved productivity by eliminating operator dependency
  • Improved quality through reproducible correct machine settings
  • Switch selectable 115/230 VAC input


  • Power Input115/230 VAC ± 10%, 50/60 Hz, switch selectable, 6VA
  • Tension Input0 to 21 mV (one or two 350 Ω full bridges), 0 to 500 mV (one 120 Ω full bridge), selectable
  • Output0 to 10 VDC or 4 to 20 mADC
  • Temperature DriftMaximum null drift .005% of load cell rating per °C. Maximum gain drift .02% of reading per °C
  • Load Cell Excitation5 or 10 VDC
  • GainCalibrates meter (full scale) with load cell loading from 1/8 to full rating
  • Zero (Tare)Up to 50% of combined load cell rating
  • Meter4 inch x 6 inch, 1 mADC scaled 0 to 100%
  • Operating Temperature0 to 40˚ C
  • Storage Temperature-30 to 65˚ C
  • Weight5.5 kg