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Osisense XU_Reliability data of the XUK9LAPSMM12 laser sensor MTTF?

The reliability data of the XUK9LAPSMM12 laser sensor, diffuse, are the following :
- MTTF = 494 years (mean time to failure),
- MTTFD = 988 years (mean time to dangerous failure),
- DC = 0 (diagnostic coverage) of the sensor alone,
- mission time = 20 years.
They are used for the functional safety, according to the ISO 13849-1 standard (Performance Level).
The MTTF calculation is made according to the EN/IEC 61709 standard (SN 29500).
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