Magnetic field strain gauge

QMF series Magnetic field strain gauge

These are non-inductive strain gauges suited to the measurement in magnetic field. The sensing element of the gauge consists of two identical grids with one grid folded back on another. This construction makes to cancel the electromagnetic noise induced in the grids. The twisted leadwire of the gauge is also effective to cancel the noise induced in the leadwire in the same way. Accordingly, this strain gauge is less sensitive to the influence of noise induced in changing magnetic field. It utilizes polyimide resin for the backing and is applicable to the measurement in high temperature.

QMF series Magnetic field strain gauge
Applicable specimen Metal
Operational temperature(℃) -30~+200℃
Temperature compensation range(℃) 0~+150℃
Applicable adhesive CN, NP-50, EB-2
Backing Polyimide
Element Ni-Cr
Strain limit at room temperature 1%(10000×10-6Strain)
Fatigue life at room temperature 1×105(±1500×10-6Strain)

  • Single-elementCE

    Single-element

    Gauge pattern Type Gauge length
    (mm)    		 Gauge width
    (mm)    		 Backing length
    (mm)    		 Backing width
    (mm)    		 Resistance
    (Ω)
    qmfla-2 QMFLA-2-11
    QMFLA-2-17
    QMFLA-2-23    		 2 0.5 5 1.5 120
    qmfla-5 QMFLA-5-11
    QMFLA-5-17
    QMFLA-5-23    		 5 0.8 9 1.8 120
    qmfla-2-350 QMFLA-2-350-11
    QMFLA-2-350-17
    QMFLA-2-350-23    		 2 0.3 4.5 1.5 350
    qmfla-5-350 QMFLA-5-350-11
    QMFLA-5-350-17
    QMFLA-5-350-23    		 5 0.3 7.8 1.5 350

    * Minimum order quantity is 10 strain gauges.

  • two-element / three-elementCE

    two-element / three-element

    Gauge pattern Type Gauge
    length
    (mm)    		 Gauge
    width
    (mm)    		 Backing
    length
    (mm)    		 Backing
    width
    (mm)    		 Resistance (Ω)
    qmfca-2 QMFCA-2-11
    QMFCA-2-17
    QMFCA-2-23    		 2 0.5 φ7 120
    qmfca-5 QMFCA-5-11
    QMFCA-5-17
    QMFCA-5-23    		 5 0.8 φ11 120
    qmfca-2-350 QMFCA-2-350-11
    QMFCA-2-350-17
    QMFCA-2-350-23    		 2 0.3 φ7 350
    qmfca-5-350 QMFCA-5-350-11
    QMFCA-5-350-17
    QMFCA-5-350-23    		 5 0.3 φ11 350
    qmfra-2 QMFRA-2-11
    QMFRA-2-17
    QMFRA-2-23    		 2 0.5 φ7 120
    qmfra-5 QMFRA-5-11
    QMFRA-5-17
    QMFRA-5-23    		 5 0.8 φ11 120
    qmfra-2-350 QMFRA-2-350-11
    QMFRA-2-350-17
    QMFRA-2-350-23    		 2 0.3 φ7 350
    qmfra-5-350 QMFRA-5-350-11
    QMFRA-5-350-17
    QMFRA-5-350-23    		 5 0.3 φ11 350

    Each package contains 10 gauges.
    The length of integral leadwire for multi-axis strain gauges of this series is available up to 1 meter

  • Strain Gauge Extension Leadwires Recommended for QMF Series

    Strain Gauge Extension Leadwires

    Usage Product name Leadwire code Operating temperature
    range of leadwire (°C )    		 Type number example
    Magnetic field Room temperature
    (without temperature
    change)    		 2-wire twisted vinyl wire LJAY-F -20~+80 QMFLA-2-11-1LJAY-F
    3.2mm-dia. 2-core shielded vinyl wire LS-F QMFLA-2-11-1LS-F
    Magnetic field Room temperature 3mm-dia. 3-core shielded vinyl wire LTSA-F QMFLA-2-11-1LTSA-F
    Magnetic field Room temperature
    (with 3-wire from the root of gauge leads)    		 LTSAS-F QMFLA-2-11-005LET-1LTSA-F
    Magnetic field High temperature 1.5mm-dia. 3-core shielded
    fluorinated resin (FEP) leadwire    		 6FD○LTS-F -30~+200 QMFLA-2-11-6FD1LTS-F
    Magnetic field High temperature
    (with 3-wire from the root of gauge leads)    		 6FD○LTSS-F QMFLA-2-11-005LET-6FD1LTS-F

    ⁂ ○ shows the length of the leadwire in meter.
    ⁂ Only the leadwires using lead-free solder are available for the strain gauges with CE marking.

    ApplicationProduct nameOperating temperature range of leadwireLoop resistance per 1 meterExample of type nameMagnetic field Room temperature (without temperature change)2-wire twisted vinyl leadwire（LJAY-F）0.44QMFLA-2-11-1LJAY-FMagnetic field Room temperature (without temperature change)3.2mm-dia. 2-core shielded vinyl wire（LS-F）0.44QMFLA-2-11-1LS-FMagnetic field Room temperature3mm-dia. 3-core shielded vinyl wire（LTSA-F）0.44QMFLA-2-11-1LTSA-FMagnetic field High temperature1.5mm-dia. 3-core shielded fluorinated resin (FEP) leadwire（6FD〇LTS-F）1.1QMFLA-2-11-6FD1LTS-FMagnetic field Room temperature (with 3-wire from the root of gauge leads)3mm-dia. 3-core shielded vinyl leadwire（LTSAS-F）0.44QMFLA-2-11-005LET-1LTSAS-FMagnetic field High temperature (with 3-wire from the root of gauge leads)1.5mm-dia. 3-core shielded fluorinated resin (FEP) leadwire（6FD〇LTSS-F）1.1QMFLA-2-11-005LET-6FD1LTSS-FType and designation of leadwire[a]：Objective material for temperature compensation (coefficient of linear thermal expansion x10-6/°C)[z]：Leadwire length (meter)QMFLA-2-[a]-6FD[z]LTS-FRed (independent)BlackWhiteShieldQMFLA-2-[a]-005LET-6FD[z]LTSS-FRed (independent)BlackWhiteShieldQMFLA-2-[a]-[z]LTSA-FQMFLA-2-[a]-[z]LS-FShieldQMFLA-2-[a]-[z]LJAY-FRed (independent)BlackWhiteShieldQMFLA-2-[a]-005LET-[z]LTSAS-FRed (independent)BlackWhiteShield

     

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MF series Magnetic field strain gauge

These non-inductive strain gauges are designed for strain measurement in magnetic fields. Two strain gauge elements are overlapped to cancel out electromagnetic induced noise occurring in the gauge, and the twisted lead wire also similarly works to cancel out induced noise. Their structure makes them less sensitive to induced noise from alternating fields.

Applicable specimen Metal, Concrete
Operational temperature(℃) MFLA:-20 to +80℃
Temperature compensation range(℃) -
Applicable adhesive CN, CN-E, RP-2
Backing MFLA:Special plastic
Element Ni-Cr
Strain limit 1% (10000 x 10-6 strain)
Fatigue life at room temperature 1 x 106 (±1500 x 10-6 strain)

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