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Description

The Flintec SB14 strain gauge sensor of the “cantilever shear beam” type is one of the most popular designs.

The principle of operation is based on the conversion of shear strain along the principal stress areas of the elastic element into an electrical signal. Strain gauges, normalization and temperature compensation elements are connected using a Wheatstone bridge circuit.

Sensors are used as components in weighing (force measuring) and weight dosing systems, scales of III (medium) accuracy class according to GOST 29329 and RM MOZM No. 76.

Features of Flintec SB14

  • A unique system for transmitting useful force (“pendulum”) in the presence of deviations in flatness.
  • A unique cavity separation system: a hermetically sealed replacement of the sensor strain cable if damaged is provided; IP68 dust and moisture protection is maintained for the entire structure.
  • High quality manufacturing: total factory control of welding seams by pumping a gas mixture (helium) into the body and subsequent leak detection.
Specifications
Strain gauge model SB-14
Symbol according to GOST 30129-96 СЗ -30/40
Maximum measurement limit (MLL), kg 91 / 227 / 454 / 1134 / 2268 / 4536
Accuracy class according to GOST 30129-96 С3
Accuracy category according to manufacturer’s documentation СЗ СЗ MI 6
Number of verification intervals, n 3000 3000
Operating transfer coefficient (RTC), mV/V 2,0 ± 0,1%
Combined error, % RKP <= ± 0,02 <= ± 0,02
Operating temperature range, °C -30…+40 (-40…+80 according to the manufacturer’s documentation)
Input impedance, Ohm 1100 ± 50
Output resistance, Ohm 1000 ± 2
Insulation resistance, GOhm >= 5
Supply voltage range, V 5…15
Permissible overload, % NPI 200
Destructive overload, % NPI 300
Sensor housing material stainless steel steel 1.4548
Shielded cable, number of cores/length 4+1(screen) / 3 m
Protection class according to GOST 14254-96 IP 68
Documentation
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