ISO 9001 and calibration

As far as I understand your situation and questions:

• Your company was certified according to ISO 9001:2015.
• Can your company internally calibrate a monitoring resource, use it to make measurements, and send the report of that measurements for the customer? Or should your company need a calibration lab?

Your company can calibrate monitoring resources internally and use those monitoring resources to make measurements and issue reports for customers. However, to perform that calibration your company must use measurement standards. Those measurement standards must be calibrated against measurement standards traceable to international or national measurement standards. Normally, that traceability requirement makes mandatory to calibrate measurements standards at a calibration lab.

You can find more information about calibration below:

• Monitoring and Measurement Equipment Control - https://advisera.com/9001academy/blog/2014/05/06/monitoring-measurement-equipment-control/
• Enroll for free course - ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
• Book - Discover ISO 9001:2015 Through Practical Examples - https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/