Ref: KD33 - ±50mN

Miniature tension / compression force transducer - ±50mN

  • Double bending beam force transducer
  • Measuring ranges: ±0.05N (± 5 grams)
  • Overload limit: ± 10N (± 20000%)
  • Accuracy: 0.5 % of full scale
  • Overload protection: 150% - Maximum lateral force: 500
  • Dimensions: 33 mm x 16 mm
  • Force input: 16 mm diameter flange, 4x M1.4 threads
  • Output: 2.5 mV / V - Power supply: 2.5 VDC
  • Output: 3 m Unitronic FD CP Plus / 4x0,14;
  • Titanium construction
  • Operating temperature : -10 to 85°C
  • 6-point traction/compression calibration certificate included
  • Weight: 5 g

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The KD33 strain gauge force transducer is designed to measure very low bending forces up to 50 mN. The design is based on the use of solid state strain gauges mounted on a double titanium alloy beam. This technology makes the transducer very robust, allowing it to withstand stresses up to 10N.

The KD33 is attached to the frame by means of 4 M1.4 threads. The force is transmitted via 4 M1.4 threads. The force measurement is determined by the deflection of the load cell under load in the horizontal direction. Due to its double beam design, the KD33 load cell offers tolerance to eccentric and lateral forces (lateral force limit: 200% of nominal force)

Accuracy is 0.5% with a nominal sensitivity of 2.5 mV/V. The connection system consists of a 3m 4-wire output cable. The force transducer KD33 is protected to a large extent against environmental influences (light, infrared radiation, air flow) by a housing. However, when the palm of a hand is approached from a few centimetres away, the zero point is immediately shifted by approx. 0.2% FS (0.1 mN) due to the radiation heat input at the mounting flange. Due to the small measuring range, vibrations, building oscillations and "any movement" in the working area cause a disturbance. When integrating, care must also be taken to keep the weight of the sample holder as low as possible.


± 50 mN
accuracy 0.5 %
non-linearity 0.5 %
Dimensions Ø16 mm x 33 mm
Output signal 2.5 mV/V
Radial force limit 200%
Axial force limit 400%
Operating temperature 10 to 50°C

The transducer is supplied with a factory calibration certificate 6 points from 1g to 5g in 20% increments.

Construction, Dimensions

The KD33 is made of titanium, waterproof to IP40. The weight is 5 grams. The nominal operating temperature is 10 to 50°C, the measurement is temperature compensated from 10 to 30°C.

Packaging and acquisition

The S-shaped sensor KD33 is supplied with 1 to 10 Vdc. Possibility to obtain a complete and configured measurement chain by adding a display, conditioner or acquisition module. See our selection:

Afficheur 9840 GSV-2TSDI GSV-3USB PMI-520AJ GSV-1A GSV-6K GSV-6K GSV-6L
Afficheur numérique haute précision 1 ou 2 voies Afficheur 24 bits avec fonction acquisition Module d'acquisition USB Conditionneur analogique de précision sortie tension ou courant Conditionneur analogique IP66 sortie +/-10v ou 4-20mA ou 12±8mA Conditionneur en ligne sortie +/-10v ou 4-20mA ou 12±8mA Conditionneur PCB miniature sortie +/-10v ou 4-20mA ou 12±8mA Afficheur simple


  • Biology
  • surface tension measurement
  • biomechanics
  • Medical
beam sensor
Measuring Range
Precision (max error)
0.5 %
Nonlinearity (% FS)
± 0.5 %
0.5 % FS
0.01 % FS
Temperature Compensated Range
10 to 30 °C
Température de fonctionnement
10 to 50 °C
Zero Balance
0.008 %PE/°C
Analog output signal
Output Signal
2.5 mV/V
Résistance du pont
350 Ω
Tension d'alimentation
10 Vcc
cable 1 m STC-31V-4
Measurement direction
0.002 mm
200 %PE
Aluminium ou Acier inoxydable
Protection Class
Measuring Range (Force)
⩽ 1 kN

  • operating temperature
  • material
  • measuring range
  • calibration


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