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RTMB-RTMX Replaced by DTXB

Made in Germany
RTMB tension meter measuring tape tension
Click images to enlarge.
RTMB / RTMX Dual Flange Rollers up to 30mm Width
BTMB / BTMX Single Flange Rollers up to 30mm Width

The RTMB tension meter is designed to measure tension of carbon fiber, tape and other narow web materials. Cylindrical rollers are offered in 7, 10, 15, 20 and 30 mm lengths to measure tapes, bands, films and similar materials. Roller length should not exceed 2x the width of the material being measured.

RTMX / BTMX Additional Features

  • Built-in datalogging with RS232 and 0-1 VDC Analog output
  • Memory capacity of 100 values plus min, max, peak, avg and standard deviation
  • Optional TensionView software available for batch download or continuous real-time trending


  • Roller shifting mechanism ensures easy acquisition of the running material
  • Cylindrical rollers pointing toward the operator
  • Dual-flanged outer guide rollers (single-flanged rollers optional, recommended if the material being measured is wider than the tape roller)
  • Carbon Fiber Optmized Rollers Optionally Available, Code CF, Inquire for details

Tension Ranges

ModelRangeResolutionRoller Widths (mm)Measuring
Head Width
2.0 - 200.0 g0.1 g7, 10, 15, 20, 3055 mm
5.0 - 500.0 g0.1 g7, 10, 15, 20, 3055 mm
50 - 1000 g1 g7, 10, 15, 20, 3055 mm
200 - 2000 g1 g7, 10, 15, 20, 3055 mm
250 - 2500 g1 g7, 10, 15, 20, 30117 mm
500 - 5000 g1 g7, 10, 15, 20, 30117 mm
1.00 - 10.00 kg0.01 kg7, 10, 15, 20117 mm
2.00 - 20.00 kg0.01 kg7, 10, 15217 mm
5.00 - 50.00 kg0.01 kg7, 10217 mm

Tape Rollers

Roller Details Dimensions
7 mm
Max Speed:
1000 (m/min)
Material: nickel-plated steel
10 mm
Max Speed:
1000 (m/min)
Material: hardcoated aluminium
15 mm
Max Speed:
1000 (m/min)
Material: hardcoated aluminium
20 mm
Max Speed:
1000 (m/min)
Material: hardcoated aluminium

Complete Kit

Supplied as a complete kit including tension meter, four (4) AA batteries, needle nose pliers and operating instruction manual all supplied in a foam fitted carrying case.


AccuracyFrom 10% up to 90% of tension range: ±0.5% full scale and ±1 digit remaining tension range and other calibration material: ± 3% full scale and ±1 digit
OverrangeApprox. 15% full scale, without accuracy guarantee
Overload protection100% of tension range
Measuring principleStrain gauge bridge
Measuring roller deflection0.2 mm max.
Converter12 bit A/D
Temperature CoefficientGain: less than ±0.01 % full scale/ºC
Zero point: less than ±0.3 % full scale/ºC
DisplayLCD 4 digit, 12 mm high
Display update rateAdjustable 0.5, 1, 2 or 4 s (averaging)
Field adjustment±7 steps in 1.5 % increment
MemoryMIN, MAX, PEAK and last value
Temperature range10 -45 ºC
Air humidity85 % relative humidity, max.
Housing Dimensions235 x 76 x 45mm (LxWxH)
Additional specifications model for BTMX
Expanded memoryMax. 100 readings, MAX, MIN, and PEAK as well as average values and standard deviation
Digital output signalRS 232 C (4800, 8, N, 2)
Analog output signal0 - 1 V DC (converter rate 16 ms)
Digimatic interfaceMitutoyo

Related Products

Click image for more info
- Small, portable and easy to use
- Prints statistical data from the DTMX Digital Tension Meter
Click image for more info
Available Rollers for Hand-Held Tension Meters
Click image for more info
Serial Cable for DTMX


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