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How is personnel safety requirements satisfied?

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How is personnel safety requirements satisfied?

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Personnel is protected using a mechanical interlock-system, prohibiting personnel exposure to laser light. The probe can not be retracted until the instrument power is turned off. Also, the interlock-system prohibits personnel exposure to the process and process water. Partially retracted, the probe can not be fully retracted until the ball valve is closed. For high-pressure applications, a special high-pressure retraction tool is used to ensure safe insertion and retraction of the probe.

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