Series R55

Square Drive Torque Sensors

This rugged series of torque sensors is ideal for a wide range of torque testing applications in numerous industries. Square drives on both ends permit inline use with a torque wrench, or for use in OEM and other applications. Ranges available up to 5,000 lbFin (550 Nm).

Requires a Mark-10 indicator, available separately.

  • Rugged cylindrical design
  • Square drives on each end
  • Member of the Plug & Test® family of interchangeable sensors and indicators
  • Stainless steel and aluminum construction
  • NIST-traceable certificate of calibration with data is included. If the sensor is ordered with an indicator, a certificate for the set (indicator + sensor) can be supplied upon request, at no additional charge.
  • Warranty: 3 years
  • Accuracy: 
    ±0.6% of full scale + indicator
  • Weight:
    MR55-20 – MR55-1000: 1.3 lb (0.6 kg)
    MR55-5000: 1.9 lb (0.9 kg)
With Model 7i and 5i Indicators
Capacity x Resolution 
Model lbFin ozFin lbFft kgFmm Ncm Nm
MR55-20 20 x 0.02 320 x 0.2 1.5 x 0.002 220 x 0.2 2 x 0.002
MR55-50 50 x 0.05 800 x 0.5 4 x 0.005 570 x 0.5 5.7 x 0.005
MR55-100 100 x 0.1 1600 x 1 8 x 0.01 1150 x 1 11.5 x 0.01
MR55-200 200 x 0.2 16 x 0.02 2300 x 2 2200 x 2 22 x 0.02
MR55-400 400 x 0.5 32 x 0.05 4600 x 5 4500 x 5 45 x 0.05
MR55-1000 1000 x 1 80 x 0.1 11500 x 10 11000 x 10 110 x 0.1
MR55-5000 5000 x 5 400 x 0.5 55 x 0.05 kgFm 55000 x 50 550 x 0.5
With Model 3i Indicator
Capacity x Resolution 
Model lbFin ozFin kgFmm Ncm
MR55-20 20 x 0.02 320 x 0.5 220 x 0.2
MR55-50 50 x 0.05 800 x 1 570 x 0.5
MR55-100 100 x 0.1 1600 x 2 1150 x 1
MR55-200 200 x 0.2 2300 x 2 2200 x 2
MR55-400 400 x 0.5 4600 x 5 4500 x 5
MR55-1000 1000 x 1 11500 x 10 11000 x 10
MR55-5000 5000 x 5 55 x 0.05 kgFm 550 x 0.5 Nm
IN [MM]
Model Drive Size A B C D ØE F
MR55-20 1/4″ 0.30
[7.5]
1.73
[44.0]
0.32
[8.0]
0.39
[10.0]
1.77
[45.0]
2.32
[59.0]
MR55-50
MR55-100
MR55-200 3/8″ 0.41
[10.5]
1.73
[44.0]
0.43
[11.0]
MR55-400
MR55-1000 1/2″ 0.59
[15.0]
0.63
[16.0]
MR55-5000 3/4″ 0.89
[22.5]
2.11
[53.5]
0.94
[24.0]
0.77
[19.5]
2.01
[51.0]
2.56
[65.0]
Model Description US Price
MR55-20 Torque sensor, 20 lbFin / 1.5 lbFft / 320 ozFin / 220 Ncm / 2 Nm $1,195.00
MR55-50 Torque sensor, 50 lbFin / 4 lbFft / 800 ozFin / 570 Ncm / 5.7 Nm $1,195.00
MR55-100 Torque sensor, 100 lbFin / 8 lbFft / 1600 ozFin / 1150 Ncm / 11.5 Nm $1,195.00
MR55-200 Torque sensor, 200 lbFin / 16 lbFft / 2300 kgFmm / 2200 Ncm / 22 Nm $1,195.00
MR55-400 Torque sensor, 400 lbFin / 32 lbFft / 4600 kgFmm / 4500 Ncm / 45 Nm $1,195.00
MR55-1000 Torque sensor, 1000 lbFin / 80 lbFft / 11500 kgFmm / 11000 Ncm / 110 Nm $1,195.00
MR55-5000 Torque sensor, 5000 lbFin / 400 lbFft / 55 kgFm / 55000 Ncm / 550 Nm $1,195.00
Additional Items to Consider
AC1010 Mounting kit, MR55-200 / MR55-400, tabletop $90.00