docs: def get_det_id(self, det_oid):
          """Convert detector string representation (OID) to serialnumber"""
          try:
              return self.detectors[self.detectors.OID == det_oid
                                    ].SERIALNUMBER.iloc[0]
          except IndexError:
              log.critical("No det ID found for OID '{}'".format(det_oid))
              return None