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Digital Light or Lux Meter Used for Measuring Brightness and Light Intensity of School, Lab, Office, Stadium, Theatres Along with Calibration Certificate by Testo Model: 540 (Range: 0~99999 Lux) - Amazon.com
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Source Testo 540 Pocket Digital Light Meter Lux Meter Lightness Tester 0 to 99999 Lux on m.alibaba.com
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Testo 540 Light Meter 0560 0540 Photometer Digital Luxmeter Light Tester Logger For Artificial And Natural Light - AliExpress
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testo Malaysia 545 | Light Meter | Test, Measuring & Lab Instruments Malaysia Supplier | Muser Apac Sdn Bhd
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