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DTMB Basic unit for many applications

The DTMB Basic unit for many applications is no longer available and has been replaced by DTS Series.
Click here to see the DTS Series.

Made in GermanyElectronic tension meter manufactured  for applications with yarns, fibers, wires, cables, optic fibers, tire cord, webs & warps, tapes & bands, tows, ribbons etc.

Easy mounting For online application, built-in material thickness compensator with material sample inserted

Field adjustment function
for fine tuning of the calibration for materials which differ from factory standard calibration material; the displayed value can be increased or decreased in ±1.5% increments.

The DTMB provides critical process information required to meet today's strict quality reporting systems mandated under ISO 9000 guidelines.

  • Precision strain gauge sensing for highest accuracy measures force on middle sensing roller
  • Selectable update rates (0.5, 1, 2 or 4 seconds) to provide steady readings when tensions fluctuate (electronic damping)
  • Recall of measured MIN, MAX and PEAK values
  • Zero adjustment feature permits use of the tension meter in various measuring positions, maintaining highest accuracy
  • Built-in mounting holes permit fixed installation for online use
  • Everything in operator's view:
    • the guide rollers
    • the measured material
    • the readings
  • Measuring frequency: 62 measurements/second
  • The display shows averaged values calculated during the update interval t1
  • Calibration to customer supplied material is available (up to two different material calibrations)
  • Filament guide and roller shifting mechanism ensure easy acquisition of the running material
  • Ball-bearing mounted, V-grooved guide rollers for Line Speeds up to 2,000 m/min
  • Rugged aluminum housing for long-term durability
  • Battery operated (AC adapter for continuous operation available)
  • Specific Test Report with Calibration report optionally available
  • Material thickness compensator for better accuracy
  • Microprocessor automatically fine-tunes the calibration to correct for different material diameters.


Special Purpose Models
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


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 and
20 Kg models; it is standard

Model Tension
Range g
Material PA***
DTMB-200 0.1 - 200.0 0.12 mm Ø  
DTMB-500 0.1 - 500.0 0.12 + 0.20 mm Ø Built-In
DTMB-1K 50 - 1000 0.20 + 0.40 mm Ø Built-In
DTMB-2K 200 - 2000 0.40 + 0.70 mm Ø Built-In
DTMB-2.5KB 250 - 2500 0.40 + 0.70 mm Ø Built-In
DTMB-5KB 500 - 5000 0.60 + 1.20 mm Ø Built-In
DTMB-10KB 1.00 - 10.00 kg 0.80 + 1.40 mm Ø Built-In
DTMBL-20KB 2.00 - 20.00 kg 1.20 + 1.80 mm Ø  
DTMBL-50KB 5.00 - 50.00 kg steel rope 1.5mm Ø
*** Suitable for 95% of applications
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.

Tension Ranges
Head width *Calibration MaterialTextile industry applicationsWire Industry Applications
DTMB-200 0.1 -
650.12mm Ømax. 200 texmax.
0,15 mm Ø
DTMB-500 0.1 -
650.12 +
0.20 mm Ø
20-500 tex0.05 -
0.25 mm Ø
DTMB-1000 50 -
650.20 +
0.40 mm Ø
10-1000 tex0.10 -
0.40 mm Ø
DTMB-2000 200 -
650.40 +
0.70 mm Ø
300-2000 tex0.30 -
0.60 mm Ø
DTMB-2500 250-
1160.40 +
0.70 mm Ø
400-2500 tex0.30 -
0.60 mm Ø
DTMB-5000 500-
1160.60 +
1.20 mm Ø
800-5000 tex0.40 -
1.00 mm Ø
DTMB-10K 1.00 -
10.00 daN
1160.80 +
1.40 mm Ø
10000 tex
0.70 -
1.20 mm Ø
DTMB-20K-L 2.00 -
20.00 daN
2161.20 +
1.80 mm Ø
20000 tex
1.00 -
1.70 mm Ø
DTMB-50K-L 5.00 -
50.00 daN
1.5 mm Ø
(7 x 7 x 0.2)
50000 tex
1.40 -
2.00 mm Ø
Other measuring head widths are available on request. Other units of measure are available in g or kg and oz or lb.
*Depending on model, either width of filament guide or outer distance between outside guide rollers.
**Suitable for 95% of applications - PA = Polyamide Monofilament

Material Thickness Compensator on all models except DTMB-200 and DTMB-50K-L

Special calibration using customer supplied samples is recommended, if process material differs significantly from the SCHMIDT calibration material in diameter, rigidity or shape. For this purpose a material sample of about 5 m should be supplied.

Complete Kit

Delivery includes:
Tension meter with carrying case and batteries, operating instructions in English or German as requested

Optional available
DTM-AC-115 AC adapter 6 V DC for 115 V AC
DTM-AC-230 AC adapter 6 V DC for 230 V AC

Calibration:According to SCHMIDT factory procedure
Accuracy:for 10% to 90% of range:
± 0.5% full scale and ± 1 digit
remaining range and other calibration material:
± 3% full scale and ± 1 digit
Overrange:Approx. 15% full scale, without accuracy guarantee
Overload protection:100% of tension range
Measuring principle:Strain gauge bridge
Measuring roller deflection:0.2 mm max.
Signal processing:Digital
Measuring frequency:62 measurements/sec
Converter:12 bit A/D
Temperature coefficient:Gain: less than ± 0.01% full scale/°C
Zero point: less than ± 0.3% full scale/°C
Display:4-digit LCD, 12 mm high
Display update rate:0.5,1,2 or 4 seconds selectable
Memory:Last, MIN, MAX, PEAK values
Field adjustment:± 7 steps in 1.5% increments
Temperature range:10 - 45ºC
Air humidity:85% RH, max.
Power supply:4 size AA batteries 1.5 V
(about 20 hours of continuous use)
Auto power off:After 2 minutes of non-use
Housing material:Die-cast aluminum
Housing dimensions:235 x 76 x 45 mm (L x W x H)
Weight, net (gross):Up to DTMB-10K approx. 680 g (1500 g)
DTMB-20K-L and higher approx. 1000 g (2200 g)

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