• Belt Tension Meter

Belt Tension Meter

  • Supplied with both plug-in and cable-connected sensors
  • Displays belt tension in Newtons (N) or pounds (lb) or, alternatively, frequency in Hertz (Hz)
  • Takes measurements quickly, displaying accurate results within one second
  • Easy-to-use keypad design simplifies operation
  • Menus are displayed in English, or the user can select German, French or Italian
  • Includes traceable calibration certificate


Drive belts achieve maximum lifetime and efficiency when tensioned to the manufacturer’s recommended tension.

The new CHECK•LINE® BTM-400PLUS Belt Tension Meter provides an easy, reliable method for accurately measuring static tension in flat, V-, cog or toothed belts of rubber, leather, fabric, plastic and composite materials.

The BTM-400PLUS’s hand-held, LED-optical sensor is cable-connected to the gauge body, which contains a microprocessor that converts the sensor signal to a pre-selected reading of either Belt Vibration Frequency (Hertz) or Belt Tension (Newtons [N] or pounds / force [lbf]).

Results are displayed on a bright, easy-to-read LCD display. An acoustic signal indicates a successful measurement.
The BTM-400PLUS’s LED-optical sensor is unaffected by ambient noise, offering improved performance versus competitive, acoustic sensor-based designs



Measuring range 10 – 400 Hz, standard
3 – 800 Hz, optional (inquire)
Free span length, max. 30 ft. (10 m)
Belt density, max. 10 kg/m
Digital sampling error < 1%
Indication error ± 1 Hz
Total error < 5%
Operating temp. 50 to 122 °F (10 to 50 °C)
Max. storage temp. 23 to 158 °F (–5 to 70 °C)
Gauge body material Plastic (ABS)
Dimensions, body 3.15 in. x 4.96 in. x 1.47 in
(80 x 126 x 37mm)
Dimensions, case 8.9 in x 7.0 in x 2.0 in.
(226 x 178 x 50mm)
Display 2-line LCD, 16 char./line
Languages English, German, French, Italian
Power supply 9-volt alkaline battery


The BTM-400PLUS is supplied as a complete kit, including: the gauge, plug-in and cable connected sensors, 9-volt battery, instruction manual—all in a foam-fitted, hard plastic carrying case.