FOG DETECTORS FOR CONTROLLING CHANGEABLE-MESSAGE SIGNS

THREE INSTRUMENTS THAT WILL CONTINUOUSLY AND AUTOMATICALLY MEASURE VISIBILITY, DETECT FOG, OR DO BOTH ARE THE FORWARD- SCATTER FUMOSENS, THE BACK-SCATTER VIDEOGRAPH, AND THE TRANSMISSOMETER SKOPOGRAPH, THESE INSTRUMENTS ARE MANUFACTURED BY IMPULSPHYSIK, GMBH, HAMBURG, WEST GERMANY AND HAVE RECENTLY BEEN INTRODUCED INTO THE U.S.A. TABLE COMPARES THE CHARACTERISTICS - VISIBILITY RANGE, OUTPUT SIGNAL, POWER, OPERATING TEMPERATURE, OPERATING HUMIDITY, WEIGHT, BASE, AND CALIBRATION--FOR EACH INSTRUMENT.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: p. 20-23
  • Monograph Title: THE CHANGEABLE-MESSAGE CONCEPT OF TRAFFIC CONTROL
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00226389
  • Record Type: Publication
  • ISBN: 0309020530
  • Files: TRIS, TRB
  • Created Date: Feb 3 1973 12:00AM