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DTMX Data-logging Digital Tension Meter
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9 ranges, 0.1 - 200.0 g to 5 - 50 Kg

The CHECKLINE DTMX Digital Tension Meters accurately measure the running line tensions of yarns, fibers, wires, cables, optic fibers and similar process materials.

It's unique design combines the latest microprocessor technology with the reliability, simplicity and ruggedness found in CHECK-LINE mechanical tension meters.

The DTMX provides the critical process information required to meet today's strict quality reporting systems mandated under ISO 9000 guidelines.
  • Built-in memory for 100 data values and statistics
  • Download capability of stored data and statistics to printers, computers or chart recorders
  • Hand-held or continuous on-line use
  • Yarns
  • Fibers
  • Wire
  • Cables
  • Optic Fibers
  • Tire Cord
  • Webs & Warps
  • Tapes & Bands
  • Tows
  • Ribbons
  • and more


  • Precision Strain Gauge Sensing for Highest Accuracy
    A precision strain-gauge sensing system accurately measures the force on the middle sensing roller. This is converted into a highly accurate tension measurement using proprietary calibration formulas which correct for material diameters, rigidities, gravity and other critical parameters.
  • Thickness Compensator Automatically Adjusts Calibration
    The microprocessor automatically fine-tunes the calibration to correct for different material diameters permitting a single DTMB or DTMX to be used on a wide range of process materials without sacrificing precision or accuracy.
  • Field Adjustment for Fine Tuning of the Calibration
    Increase or decrease the displayed readings in 1.5% increments or select Special Calibration (SP).
  • User-Selected Calibration Formulas For Highest Accuracy
    Select "Textile", "Wire", or "Special" calibration (SP1 or SP2). Special calibration is performed by the factory or by the end user with a specific sample of the process material.
  • High-Speed Measurement Captures Max, Min & Peak Tension Values
    Tensions are sampled 62 times per second and averaged over a user selected interval of 0.5, 1, 2 or 4 seconds. The maximum, minimum and peak values are stored for recall to the display.
  • Precision V-Grooved Rollers for Line Speeds Up to 5,000 m/min
    Ball-bearing mounted, V-grooved rollers are hard coated aluminum for speeds up to 2,000 m/min. Optional High-Speed Rollers (U) are offered for 5,000 m/min. Hardened steel, ceramic and plastic rollers are also available
  • Rugged Aluminum Housing For Long-Term Durability
    Die-cast aluminum housing and surface-mount electronics insure trouble free operation in the toughest environments.
  • NIST-Traceable Calibration Certification optionally available
  • Store Tension Data & Output to Printers & Computers
    Store tension data on-demand or continuously with the DTMX built-in datalogger. Stored data and statistics can be output to printers, computers or chart recorders.
DIP switch for adjustment by operator e. g. display update rate

• Saving MIN, MAX and PEAK values during a user-selected period. These values can be recalled at the display.

Material thickness compensator: For better accuracy the material to be measured or a similar material with the same diameter should be inserted

Thickness Compensator Automatically Adjusts Calibration The microprocessor automatically fine-tunes the calibration to correct for different material diameters permitting a single DTMB or DTMX to be used on a wide range of process materials without sacrificing precision or accuracy.

Related Products

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Data Transfer & Analysis Program
- Data can be viewed and analyzed in TensionInspect or transferred to Excel
- Selectable sample rates and scalable trend graph "x" and "y" axis
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Serial Cable for DTMX
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- Small, portable and easy to use
- Prints statistical data from the DTMX Digital Tension Meter
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Available Rollers for Hand-Held Tension Meters

Tension Ranges

ModelRangeOuter Roller Spacing c:cApplication Guidelines (Textiles)Application Guidelines (Wire)
DTMX-2000.1 - 200.0 g38 mm1000 Denier0.15 mm (max)
DTMX-5000.1 - 500.0 g38 mm0.05-0.25mm0.05-0.25 mm
DTMX-1K50 - 1000 g38 mm0.10 - 0.40 mm.10 - 0.25 mm
DTMX-2K200 - 2000 g38 mm0.30 - 0.70 mm0.30 - 0.70 mm
DTMX-2.5KB250 - 2500 g100 mm0.30 - 0.70 mm0.30 - 0.70 mm
DTMX-5KB500 - 5000 g100 mm0.50 - 1.20 mm0.40 - 1.00 mm
DTMX-10KB1.00 - 10.00 Kg100 mm0.70 - 1.40 mm0.70 - 1.20 mm
DTMXL-20KB*2.00 - 20.00 Kg200 mm1.00 - 2.00 mm1.50 - 1.70 mm
DTMXL-50KB*5.00 - 50.00 Kg200 mm1.50 - 3.00 mm1.70 - 3.00 mm
1. Application Guidelines for Textiles refer specifically to nylon monofilament.
2. Application Guidelines for Wire refer to soft annealed copper wire
3. DTMB models are calibrated with monofilaments only.
If customer sample varies greatly in diameter or rigidity,
?special calibration with customer sample is recommended.
4. Calibration in ounces/pounds and cN/daN is optionally available.

*These models require customer supplied samples for calibration.


Special Purpose Models

Click here for more information on the FTMX.

Click here for more information on the DTFX.
Optic Fibers Limited Access

Uses low-inertia
32 mm dia. rollers for fragile materials sensitive to bending over a small radius. Rollers are available in plastic or aluminum.

Tension Ranges (g):
0-200, 0-500, 50-1000, 200-2000

Long, flat fingers and miniature V-grooved rollers permit measurement in areas with limited space or tightly grouped filaments.

Tension Ranges (g):
0-200, 0-500, 50-1000, 200-2000

Click here for more information on the RTMX/BTMX.

Tapes and Bands Lever Model

Cylindrical rollers are available in 10, 15, 20 and 30 mm widths with single or dual flanges.

Tension Ranges (g):
Refer to Application Guide


The Lever is used instead of the thumb-piece for high tension applications. The lever is optional on the 10 Kg model.
On the 20 Kg models, it is standard.


Model Factory
Cu-wire annealed****
DTMX-200 0.12 mm Ø 0.10mm Ø
DTMX-500 0.12 + 0.20 mm Ø 0.16 + 0.25 mm Ø Built-In
DTMX-1K 0.20 + 0.40 mm Ø 0.25 + 0.40 mm Ø Built-In
DTMX-2K 0.40 + 0.70 mm Ø 0.40 + 0.60 mm Ø Built-In
DTMX-2.5KB 0.40 + 0.70 mm Ø 0.40 + 0.60 mm Ø Built-In
DTMX-5KB 0.60 + 1.20 mm Ø 0.60 + 1.00 mm Ø Built-In
DTMX-10KB 0.80 + 1.40 mm Ø 0.70 + 1.20 mm Ø Built-In
DTMXL-20KB 1.20 + 1.80 mm Ø steel rope 1.5
und 2.0 mm Ø
DTMXL-50KB steel rope 1.5 mm Ø
steel rope 2.0 mm Ø

*** Suitable for 95 % of applications
**** Accuracy: ± 3 % full scale (FS) and ± 1 dgit

Calibration to customized material:
If process material differs significantly from the factory calibration material in diameter, rigidity or shape, special calibration using customer supplied samples is recommended. For this purpose a material sample of about 5 m should be supplied.

Complete Kit

The DTMX complete kit includes the tension meter, four (4) AA batteries, operating instruction manual and output connector all supplied in a foam fitted carrying case.


*Accuracy± 0.5% Full Scale, ± 1 digit (10 - 90% of Full Scale)
± 3.0% Full Scale, ± 1 digit (Rest of range & for other calibration materials)
Measuring UnitsKg / Lb standard
cN / N Optional
Measuring Frequency62 measurements/second
Deflection of Sensing Roller0.2 mm (maximum)
Overload Capacity200% of Full Scale
Display4-Digit LCD, 12 mm high
Display Update Rate0.5, 1.0, 2.0 or 4.0 seconds, dip-switch selectable
Standard MemoryLast, maximum, minimum and peak
Field Calibration Adjustment± 7 steps, 1.5% per step
Battery TypeFour (4) 1.5 V AA (included)
Battery Life20 hours, continuous use
Auto Power OffAfter 2 minutes of non-use
Roller MaterialHard Coated (Standard)
Hardened Steel (ST) (optional)
Ceramic (CE) (optional)
Plastic (PL) (optional)
Maximum Speed2000 m/min (standard)
2500 m/min (U)
Housing MaterialDie-cast Aluminum
Weight1.43 lbs. (650 g)
Operating Temperature32 to 132 °F (0 to 45 °C)
WarrantyOne year
Memory Capacity100 values plus maximum, minimum, average, peak, standard deviation and memory location
Memory OperationContinuous Mode: Automatic storage of each displayed value until memory is full
On-Demand Mode: Displayed value is stored when STORE key is pressed
Serial OutputRS-232C (4800 baud, 8 bit word length, no parity, 2 stop bits)
Analog Output0-1 VDC, proportional to tension range
AC Adapter (optional)6 VDC @ 300 mA, for continuous in-line use
Note* Quoted accuracy can only be gauranteed on standard factory calibration materials. Because of the wide variety of customer samples, accuracy may exceed standard tolerances.