Mechanical Aircraft Cable Tension Meter

ACM Aircraft Cable Tension Meters precisely measure the tension in aircraft cables. Use to measure flexible cables with diameters from 1/16” up to 1/4”, CWT cable sizes from 5 to 25, and tension from 5 to 600 pounds.

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First check the chart on the back of the instrument to find the riser setting that corresponds to your cable diameter. Rotate the riser so the correct riser number faces you. Rotate the engagement lever open, and rest the instrument on your tensioned cable. Then rotate the lever closed to engage the instrument on the cable. Read the number indicated by the needle on the dial face, and convert that number to a tension value using the chart on the back of the meter.


  • Quick, easy, one-handed operation
  • Textured handle for secure grip
  • Built-in cable selection – no loose, separate risers
  • Calibration chart is attached to the meter, easily accessible during use
  • Memory Lock Pointer holds readings taken in hard-to-reach areas
  • Compact design allows access to small spaces – most models need only 4” clearance
  • Durable construction, non-corrodible materials
  • Lightweight: approximately 21 oz.
  • Stock item – ready to ship, ready to use right out of the box
  • NIST-traceable calibration certification included
  • One-year warranty against factory defects
  • Manufactured and built at our factory in Longmont, Colorado, USA

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For North American sales, click HERE to receive a quote. For sales outside of North America, click HERE to reach a distributor. Contact Tensitron at 303-702-1980 or for details.

# Model Cable Selection Accuracy -Full Scale Range (Lbs.)
1 ACM-100 1/16, 3/32, 1/8, 5/32" 4% 5-100
2 ACM-200 1/16, 3/32, 1/8, 5/32, 3/16, 1/4" 4% 20-200
3 ACM-300

3/32, 1/8, 3/16, 1/4"

6% 40-300
4 ACM-400

3/32, 1/8, 5/32, 3/16"

6% 40-400
5 ACM-600 1/8, 5/32, 3/16, 1/4" 8% 40-600
6 ACM-150-CWT

5, 10, 15, 20 & 25 CWT cables

4% 10-150
7 ACM-300-CWT 10, 15, 20 & 25 CWT cables 6% 40-300

Accuracy for custom calibrations is material-specific.

Previous Part Numbers

Previous Part No. Cables Measured Comment Tension Range Current Part No.
CWT-150 5, 10, 15, 20 and 25 CWT 10-150 lb. ACM-150-CWT
CWT-300 5, 10, 15, 20 and 25 CWT Cables are now 10, 15, 20 and 25 CWT 40-300 lb. ACM-300-CWT


Tensitron calibrates instruments using the “free hanging weight” method. This means that we vertically suspend an accurately-sized cable, attach a NIST-certified weight to the bottom of it, engage the instrument on the cable, and the tension reading on the instrument will correspond to the amount of the weight. If you require a different calibration method, please contact Tensitron.

To verify the accuracy of your Tensitron meter, use the “free hanging weight” method as a standard rather than comparing your meter’s readings to those of another gauge. Also do not use a tensioning device that converts rotational torque into tension values, and do not simulate tension using a calibration bar, because these systems are often inaccurate and may damage your meter. If you need assistance, please refer to your meter’s Operating Instructions or contact Tensitron.


  • Size (All but ACM-600): 8.24" L x 3.38" W x 1.56" Thk.
  • Size (ACM-600): 8.24" L x 5.20" W x 1.56" Thk.
  • Approximate weight: 1.5 Lbs depending upon configuration
  • CE certification complying with “EN 61326-1: 1997, Electrical Equipment for Measurement, Control and Laboratory Use”
  • FCC certification

Dimensioned Drawings

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Downloadable Files: