2M Technology 2MTHFR-2M Quick Manual - Page 3

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Pollution degree of the intended environment: the operational environment
should be with less dust to avoid the pollution of blackbody target. (Pollution
degree 2)
If the euipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
2 Appearance and Size
Appearances and sizes vary with device type. The actual product shall prevail.
Appearance and Size 1
Appearance and Size 2
2