SFD
Tension Sensor

6 Tension ranges available
from 0 – 10 N up to 0 – 500 N
For measuring the tension of running wires, fibre optics, cables, ropes, slim tapes and foils

Single roller tension sensor for installation at an existing deflection point

Special Features

  • Tension sensor SFD without amplifier, output signal mV/V
  • Sensor for installation at an existing deflection pulley; the in- and outcoming angle has to be constant
  • Existing rollers with 20 – 180 degree wrap angles can be used as measurement points for the sensor
  • Directly, axial force transmission
  • M25 x 2.5 threaded housing with lock-nuts permits easy mounting and simple alignment at a deviating point
  • The progressively adjustable axial mounting depth using two mounting screws wrench size 32 enables an accurate positioning of the guide roller
  • 10 times overload protection, max. 2000 N
  • Easy mounting of SCHMIDT rollers or customer provided rollers, send us your request!
  • IP 54 (dust tight and dripping water) protected
  • Special design to be used in explosive areas available on request

Standard Features

  • Required power supply + 10 V DC regulated
  • Rugged, stainless steel housing
  • Sensor with highly mechanical rigidity
  • Supplied with a 5 m shielded cable with open ends (optional lengths are available)
  • Optionally available: Inspection Certificate 3.1 according EN 10204 with calibration report (only available in combination with a display)

 Available Models

Model Nominal Load
SFD-10 10 N
SFD-20 20 N
SFD-50 50 N
SFD-100 100 N
SFD-200 200 N
SFD-500 500 N

SPECIFICATIONS

Measuring range: 10 bis 500 N – nominal load
Accuracy: 0.5 % FS (full scale)
Max. applied force: 160 % of nominal load, overload protection afterwards
Overload: 10 times of nominal load, max. 2000 N (depending on measuring range)
Transverse force at the axle: Max. 100 % nominal load
Axle deflection: < 0.5 mm
Measuring principle: Strain gauge bridge
Output signal: 1 mV/V
Max. power supply: 10 V DC
Connecting cable: 5 m
Bridge resistor: 350 Ω
IP code: IP 54
Temperature range: -10…+70° C
Housing: Stainless-steel
Weight, net (gross): Approx. 400 g (700 g) inclusive 5 m cable

Specifications subject to change without notice!

MOUNTING

Tension sensor SFD can be easily mounted everywhere a deviating point respectively a guide roller is built in at the machine. These places can be used as measuring point, assumed the in and outgoing angle is constant.

CALCULATING THE TENSION RANGE

The tension range can be calculated for every wrapping angle with this formula :

When selecting the nominal measurement force it is necessary to take into account the weight of the guide roll and raise the nominal load respectively, particularly when working with small nominal forces.

AXLE JOUNAL

Design Axle diameter in mm Suitable Bearing
Standard 10 f7 6000/6300

GUIDE ROLLERS

You can mount your own guide rollers or Schmidt rollers. A big number of rollers with different geometry and different materials are available on request – send us your demand !

CABLE CONNECTION

Code T – Axial output (Standard)

Axial output with screwed cable gland, cable length 5 m (longer cables available on request)

 

 

 

 

 

 

Code N2 – Straight plug

Axial output with straight plug connection M12, cable length 5 m (longer cables available on request)

 

 

 

 

 

Code S2 – Right-angled plug

Axial output with right-angled plug connection M12, cable length 5 m (longer cables available on request)

DELIVERY INCLUDES

Tension sensor SFD with cable and transport packaging, operating instruction in German or English (as requested)

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