The LX-1 models of Digital Instruments are used to measure tension(s) on materials from .032" (20 AWG) to 5/32 inch diameter. Measure tension(s) on flexible cables, wires, filaments, tapes and ribbons where expected tensions range from 5 to 50 Lbs, 5 to 100 Lbs, 5 to 250 Lbs, or 25 to 500 Lbs.

The standard calibration is to 1/16" cable, but flexible materials with a diameter up to 5/32" can typically be used with these instruments. For larger diameter cables, please view information on the CX-1 Series of instruments. For tape or strapping applications, LX-1 instruments can be equipped with cylindrical rollers: see the "R" Option below.

  • Accurate
  • Dependable
  • Reliable
Click here for the LX-1 Data Sheet


First select the material size from the instrument’s menu. Next separate the instrument’s outer rollers by rotating the engagement lever open and inserting the instrument onto your tensioned material. Then rotate the lever closed to engage the instrument to the tensioned sample. Your material will drop automatically into place and readings will appear on the display once the lever is engaged.


  • Large, easy to read backlit, color display with adjustable backlighting.
  • Display shows tension, description of material selected, dynamic color bar graph indicating changing tensions (Amber = tension too low, Green = correct tension range and red= over range), the previous 5 tension readings along with their average and the battery charge level
  • Select tension values to display in Lbs., daN or KG
  • Depress the "Store” button to record and average your previous five readings along with their average
  • Data Logging Feature. Select either Continuous or Single Point data logging mode and record tension values to the instrument’s memory.
  • Data Statistics: Monitor your process by viewing count, maximum, minimum, average, and standard deviation values of your logged data.
  • Data Averaging: Use this feature to adjust the stability of your displayed, tension readings. This feature allows the user to select the duration the instrument takes tension readings over and posting that average to the display. Options are: 1, 2, 5 and 10 seconds. This is a rolling average, meaning that only the readings taken in the last 1, 2, 5 or 10 seconds (your choice) will be averaged and displayed.
  • Up to 10 additional custom calibrations may be programmed into the instrument
  • Extremely accurate custom calibration procedure employing up to a 10-point multilinearization procedure.
  • All calibrations are password protected
  • Adjustable LCD refresh rates allowing for stable, digital readouts
  • Automatic shutoff after several minutes of non-use
  • Instruments may be operated continuously while connected to power supply
  • Set-Point feature allowing user to define high and low point specifications which are then shown on the main display as an active, color changing bar graph.
  • Rechargeable NiMH batteries with power supply provided. Approximately 12 hours of continuous use depending upon backlighting intensity.
  • Power supply operates with input voltages from 100 – 240V and includes several, interchangeable adapters allowing use with European, Australian, US, English and other plug configurations.
  • Optional features including: Analog Output and Serial Output
  • All models typically available from stock
  • Includes easy to use, cable diameter gauge to accurately determine correct cable size
  • Numerous application specific models available
  • Durable, lightweight carrying case with protective foam inserts
  • All instruments factory-calibrated and ready for use. Calibration certificate included and all calibration values traceable to National Standards
  • All new instruments are warrantied against defects in materials or workmanship for the period of one (1) year


  • Battery charge level
  • Selectable Tension in Lbs., KG or DecaNewtons
  • Select Cable and Size. Instrument automatically adjusts calibration
  • Active, color changing Bar Graph
  • Store and Display up to 5 separate tensions readings and their average

Standard LX-1 Instruments

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 sales@tensitron.com for details.

NEW PRODUCTS AVAILABLE: The LX-50-1 and LX-100-1 measure smaller cables with greater accuracy, and the LX-W models have wider-spaced contact elements to measure stiffer materials.

Model Example Materials Range Resolution Accuracy - Full Scale

Copper Wire 19 - 13 AWG

5-50 lb. 0.5 lb. 2%

Copper Wire 19 - 13 AWG

5-100 lb. 0.5 lb. 2%

Copper Wire 14 - 9 AWG

Steel wire up to .04", 1mm
Braided cable up to 5/32", 4mm

5-250 lb. 0.5 lb. 2%

Copper Wire 14 - 9 AWG
Steel wire up to .04", 1mm
Braided cable up to 5/32", 4mm

5-250 lb. 1.0 lb. 2%

Copper Wire 11 - 5 AWG
Steel wire up to .08", 2mm
Braided cable up to 1/4", 6.3mm

5-100 lb. .5 lb. 2%

Copper Wire 11 - 5 AWG
Steel wire up to .08", 2mm
Braided cable up to 1/4", 6.3mm

5-250 lb. .5 lb. 2%

Copper Wire 11 - 5 AWG
Steel wire up to .08", 2mm
Braided cable up to 1/4", 6.3mm

25-250 lb. 1.0 lb. 2%

Full-scale accuracy for all models up to 500 Lbs. = 2%. Accuracy for custom calibrations is material specific.

To continuously monitor tensions consider these options:

Available options and accessories for all LX-1 instruments:

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 sales@tensitron.com for details.

Option / P.N. Description

Analog Output Option. 0-5 VDC or 4-20mA with software definable ending sequences. Provided with 10’ cable and data outputted at 40 Hz

-E RS-232 Serial Output option. Provided with 10’ cable with DB-9 connector to interface with your receiving device. USB to DB9 adapter available on request. Select data sampling rate from 1, 2 or 5 Hz
-R Custom Roller option. 1” cylindrical rollers, suitable for measuring strapping or tape.

Power Supply, digital instruments (with interchangeable adapters)

Serial Output Note: Your receiving device will require a "software wedge" in order to upload data from the instrument and there are many of these programs to choose from. (If you require a "software wedge" program there is "freeware" software available as long as it is not used in countries with encryption restrictions [US, Europe and Canada are fine] and usually this "freeware" does not need to be installed to operate.)


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 models): 8.75" L x 5.50" W x 2.40" Thk.
  • Approximate weight: 1.5 Lbs depending upon configuration
  • FCC certification

Dimensioned Drawings:

Click here and download to view 360°

Click here and download to view 360°

Downloadable Files:

Makers of the original Saxl instruments. American made and serviced by US craftsmen since 1935. Calibrations traceable to the National Institute of Standards and Technology (N.I.S.T.)