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  • BJ-AT

    Suitable to check concrete blocks for opening at the joint.

    Embedded across a joint of adjoining concrete blocks, the BJ-AT series joint transducers measure an opening between blocks. A temperature measuring function enables simultaneous measurement of displacement and temperature. In addition, for measurement of cracks of concrete or rock-bed, a dedicated receptacle allows embedment in concrete and mounting legs or fixtures enable surface installation.
    Features
    ?? Suitable to check concrete blocks for an opening at the joint or cracks initiated mainly by temperature change
    ?? Mounting fixtures are available to measure an opening between a hydraulic pipe and backing concrete, as well as to use them as ordinary displacement transducers to check for deformation of blocks at dam monitoring areas or to detect displacement of rock-bed.
    ?? For embedment in concrete, the dedicated receptacle CJS-1C is embedded in advance in a preceding block and the joint transducer is installed to the next block.
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    Specifications
    Model Rated Capacity(Displacement)
    BJ-5AT 5mm
    BJ-10AT 10mm
    BJ-20AT 20mm
    BJ-50AT 50mm
    Displacement Measurement
    Rated Capacity See table above
    Nonlinearity Within ??1.5% RO
    Hysteresis Within ??1.5% RO
    Rated Output 1 mV/V (2000??m/m) or more
    Temperature Measurement
    Rated Capacity -30 to 70??C
    Measurement Error ??0.5 ??C (-30 to 70??C)
    (Refer to Small-Sized Temperature Transducer BTS-100AT)
    Environmental Characteristics
    Safe Temperature Range -30 to 80??C
    Compensated Temperature Range -20 to 70??C
    Temperature Effect on Zero Balance Within ??0.05% RO/??C
    Temperature Effect on Output Within ??0.05%/??C
    Electrical Characteristics
    Recommended Excitation Voltage 2 to 10V AC or DC
    Input Resistance 350???1% at 0??C
    Output Resistance 450???0.8% at 0??C
    Cable 4-conductor (0.5 mm2) chloroprene shielded cable,
    11.5 mm diameter by 1 m long, bared at the tip
    Mechanical Properties
    Safe Overload Rating 120%
    Weight Approx. 790 g
    Optional Accessory
    Dedicated receptac CJS-1S
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