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        The JJF 1224-2009 standard is for calibrating steel protective layer thickness measurement instruments and floor thickness measurement instruments. This specification describes the working principle and calibration method of both instruments to ensure their measurement accuracy. Steel protective layer thickness measurement instruments use electromagnetic principles to nondestructive detect the thickness of steel protective layers and the distribution of steel bars; floor thickness measurement instruments transmit and receive electromagnetic signals to measure the actual thickness of the floor. The cited literature includes general measurement terminology, measurement uncertainty assessment, and specifications for the evaluation of the characteristics of measuring instruments to ensure the accuracy and standardization of calibrating work.

        This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
        Status Active
        CCS ICS
        Release Date 2009-07-10 00:00:00 Implementation Date 2009-10-10 00:00:00
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        0.8~300mmLow precision: 0.65mm~ 99.9mm ± 0.1mm 100.0mm~ 400.0mm ≤ 0.3% High precision: 0.8mm~ 9.99mm ± 0.04mm 10.00mm~ 99.99mm ± (0.1% + 0.04) mm 100.0mm~ 400.0mm ≤ 0.3% Hmm Note: H is the measurement of Film thickness value
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        KAIRDA NDT360 Ultrasonic Thickness Gauge 0.15~ 300mm
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        0.15~ 300 mm (45 #steel)0.03mm ∈ 0.3% * H
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        Defelsko C Standard 200C1-E Ultrasonic Thickness Gauge Coating thickness measurement of concrete, fiberglass, etc
        $2959.00 SE
        Defelsko C Standard 200C1-E Ultrasonic Thickness Gauge Coating thickness measurement of concrete, fiberglass, etc
        50 ~ 3800m± (3% H + 2) μm
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        AMITTARI AT-140B high-precision Ultrasonic Thickness Gauge resolution 0.01 Measurement range 1-300mm
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        AMITTARI AT-140B high-precision Ultrasonic Thickness Gauge resolution 0.01 Measurement range 1-300mm
        1.5~200mmF8mm±(0.5%H+0.2)mm
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        Ultrasonic Thickness Gauge DC-4000, automatic and manual measurement
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        Ultrasonic Thickness Gauge DC-4000, automatic and manual measurement
        T~E：1.4~200mm；E~E：3.0~25mm
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        DONGRU DR86S Ultrasonic Thickness Gauge 500mm/0.01mm Slim Mode
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        SMART SENSOR AR850 + Ultrasonic Thickness Gauge measurement range 1.2-225 mm
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        SMART SENSOR AR850 + Ultrasonic Thickness Gauge measurement range 1.2-225 mm
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        High-precision ultrasonic Thickness Gauge DC-6000 Deguang Electronics, suitable for high-precision measurement of ultra-thin parts
        $2439.00 SE
        High-precision ultrasonic Thickness Gauge DC-6000 Deguang Electronics, suitable for high-precision measurement of ultra-thin parts
        T~E：1.5~20mm E-E：0.2mm~10mm± 0.04mm (Film thickness < 9.99mm), ± (0.1% Film thickness value + 0.04) mm Film thickness value = 10~99.9mm
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        KAIRDA NDT370 Pen Electromagnetic Ultrasonic Thickness Gauge with High Temperature Probe
        $4613.00 SE
        KAIRDA NDT370 Pen Electromagnetic Ultrasonic Thickness Gauge with High Temperature Probe
        1~ 240.0mm (Measurement Range depends on the material)Film thickness < 10mm, error + 0.05mm; Film thickness > 10mm error ± (0.01 + H/200) mm (H is the workpiece Film thickness value)
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        SMART SENSOR AR860 Ultrasonic Thickness Gauge measurement range 1.0~300mm
        $298.00 SE
        SMART SENSOR AR860 Ultrasonic Thickness Gauge measurement range 1.0~300mm
        1.0-300mm±(1%H±0.1)mm
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        SMART SENSOR AS840 Ultrasonic Thickness Gauge Measurement Range 1.2-225 mm
        $127.00 SE
        SMART SENSOR AS840 Ultrasonic Thickness Gauge Measurement Range 1.2-225 mm
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        D5113 Ultrasonic Thickness Gauge Probe for measurement of materials below 350 ℃
        $275.00 SE
        D5113 Ultrasonic Thickness Gauge Probe for measurement of materials below 350 ℃
        3.0‐200mm
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        DUBAN DB22-TM240T6 Multimode Ultrasonic Thickness Gauge
        $743.00 SE
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        SMART SENSOR AS860 Ultrasonic Thickness Gauge 1.2-225 mm Range 1% accuracy
        $216.00 SE
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        Defelsko C Advanced 2003-E Ultrasonic Coating Thickness Gauge Coating thickness of concrete, fiberglass, etc
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        50~3800μm(2~150 mils)±(3%H+2)μm
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        Deguang Electronics D5008 Ultrasonic Thickness Gauge Probe, this probe can be selected in various situations
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        Deguang Electronics D5008 Ultrasonic Thickness Gauge Probe, this probe can be selected in various situations
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        Defelsko B Advanced 200B3-E Ultrasonic Thickness Gauge polymer substrate Coating thickness High versatility
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        Mattel MT180 wearable coating Ultrasonic Thickness Gauge coating Thickness range 3~ 30mm
        $491.00 SE
        Mattel MT180 wearable coating Ultrasonic Thickness Gauge coating Thickness range 3~ 30mm
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        Mattel MT160 Ultrasonic Thickness Gauge Thickness Range 0.75~ 300mm USB Interface
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        Defelsko PosiTector UTG C1 ultrasonic wall thickness meter for single-sided measurable structures only
        $1302.00 SE
        Defelsko PosiTector UTG C1 ultrasonic wall thickness meter for single-sided measurable structures only
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        Defelsko PosiTector UTG M1 digital display ultrasonic wall thickness meter, multi-echo probe 2.5~ 125mm range
        $2151.00 SE
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        Defelsko Positector200 Standard Ultrasonic Coating Thickness Gauge D Standard 200D1-E
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        SMART SENSOR AS850 Ultrasonic Thickness Gauge measurement range 1.2-225 mm
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        LANDTEK TM8810 Ultrasonic Thickness Gauge Suitable for metal, ceramic, hard Rubber & plastics, Glass and other hard materials
        $236.00 SE
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