Through hole annular load cells




Ring force transducers or annual load cells are made of one-piece and easy to mount. They suit nearly every installation. Hydraulic ring force transducers are an efficient solution to measure anchor forces for example. Ring force transducers or annual load cells are used for reliable measurements of medium and small compression forces. Areas of applications are screw presses, cutting tools, propeller shafts and the measurement of bolt forces


Technical features

  • Nominal load: 10 kN up to 200 kN
  • Output: strain gauge full bridge, 1 mV/V
  • Voltage supply: 10 VDC
  • Accuracy: +/- 0,5% of range
  • Temperature range: -20...+80 °C
  • Safe overload: 150% of nominal range
  • Material: stainless steel ARMCO 17-4PH
  • Protection: IP66
  • Connection: 3 m cable
  • Particularly robust for heavy duty industrial use
  • Optional: integrated measuring amplifier (4...20mA, ±10V or 0...10V)
  • Optional: integrated IO-Link measuring amplifier
  • Optional: calibration ÖNORM EN ISO/IEC 17025
  • High temperature: -50°C...+150°C



For use in all ranges where weights have to be measured, e.g. monitoring screw preload, deep-draw pressing force, fork lift truck overload or failsafe cable tension.

Specifications Technique
Capacity 10kN - S-FOWA-10
20kN - S-FOWA-20
40kN - S-FOWA-40
80kN - S-FOWA-80
120kN - S-FOWA-120
160kN - S-FOWA-160
200kN - S-FOWA-200
Sensitivity 1.00 mV/V
Zero balance ±1.00%F.S.
Non-linearity 0.20%F.S.
Repeatability 0.10%F.S.
Creep{30min) 0.5%F.S.
Temp.effect on output 0.005%F.S./10 C
Temp.effect on zero 0.03%F.S./10 C
Output impedance 700Ω
Insulation ≥500M Ω /100VDC
Recommended excitation 5-15V
Maximum excitation Voltage 20V
Compensated temp. range 0∼70°C
Operating temp. range -20∼80°C
Safe load limit 150%F.S.
Breaking load 200%F.S.
Cable size 3m PUR cable, shielded, 4-wire
Material Stainless Steel 17-4PH
IP Class IP66


Range (kN) Screw, bolt ØA ØB C
10 M6 18 6,1 12
20 M8 22 8,1 12
40 M10 28 10,2 12
80 M12 38 12,2 15
100 M16 42 16,3 20
120 M24 50 24,3 25
160 M30 60 30,5 30
200 M36 75 36,5 30


Ring Force Washer Annual Load Cell

Abmasse Dimensions1Abmasse Dimensions2Wiring