Products

Transducer-specific strain gauges

TML strain gauges are used not only for the purpose of knowing strain/stress but also as sensors for strain gauge type transducers. A strain gauge type transducer converts physical quantity such as load, pressure or displacement into mechanical strain on the strain generating body (elastic body), and the mechanical strain is converted into electrical output using strain gauges mounted on the elastic body. We offer various types of transducer-specific strain gauges featuring highly reliable and stable performance.

  • Force transducers (Load cell)
  • Pressure transducers
  • Acceleration transducers
  • Displacement transducers
  • Torque transducers

VARIOUS TYPES OF TML TRANSDUCER-SPECIFIC SRAIN GAUGES

  • GAUGE SHAPE AND GAUGE LENGTH

Single, Rectangular 2-element, Torque(Shearing) strain measurement

Pattern Gauge length (mm)
Single-element 2, 3
90°2-element 2, 3, 6
Torque (Shearing strain) use 2

Pattern

Transducer-specific strain gauges Pattern

2 types of 90°2-element gauge are lined-up with different pattern of gauge tab. CM-type has half-bridge configuration.

  • GAUGE RESISTANCE
Pattern Gauge resistance (Ω)
Single-element 350,1000
90° 2-element 120,350
Torque (Shearing strain) use 350

*1000-ohm gauge has less power consumption in bridge circuit comparing to 350-ohm gauge’s and limits Joule’s heat generation.

  • GAUGE BACKING MATERIALS

Unlike stress measurement gauges, the gauge backing materials for transducer-specific strain gauge cannot be determined based solely on the operational temperature and bonding method. To ensure maximum transducer performance, it is necessary to test various combinations using different stress-generating bodies (elastic bodies) to select the most suitable backing materials.

  • OPERATIONAL TEMPERATURE RANGE
Operational temperature differs from heat-resistant temperature. F series gauge having epoxy resin is available with heat-curing type bonding adhesive.
Gauge series Gauge base materials Operational temperature
F special plastic resin -20 ~ +80 (°C)
QF Polyimide resin -20 ~ +200 (°C)
EF Polyimide resin -20 ~ +200 (°C)
  • CREEP ADJUSTMENT

The creep characteristic is particularly important in force transducers. The most common compensation system uses the material creep (+) of the stress-generating body (elastic body) and the gauge creep (-) to cancel each other. Various TML strain gauges are available for creep adjustment and are selectable by creep code.

Creep code

Gauge creep Large ---> Small
Creep code C2>C4>C6>C8
  • TEMPERATURE SENSITIVITY COMPENSATION
Elastic modulus of srain-generating body (elastic body) varies with temperature variation. In the same manner, as ambient temperature around the strain-generating body varies, resulting in change of apparent strain. To reduce such temperature influence, sensitivity compensation resistor is assembled in bridge circuit.

Detailed specifications must be discussed and decided before ordering gauges for transducers.
Consult your sales representative.

Detailed material

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