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Metone公司是一家在研究，开发和气象仪器、微粒监测、数据记录器和环境的软件制造的领导者之一，是美国最古老的仪器生产商之一，项目包括从亚洲到中东国家，以及在美国和国际间提供可吸入颗粒物的监测，为整个气象监测网络做出了重要贡献。现场培训和完整的最终用户满意度调试一直是目标。民营企业，科研机构，大学，军事和家庭防御组织，以及各级政府环保机构都是Metone公司的重要客户。

Met One Instruments’ Model 6400 Visibility Sensor is designed to monitor visibility conditions over a range of 20ft-50miles (6m-80km). Our Model 6400 includes both digital and relay outputs. The Digital RS232 output at 300-38,400 Baud can be used to indicate the present visibility, provide diagnostic information, and provide access to the configuration and calibration options. The SPDT relay with configurable pull in and drop out set points can provide signals to a VMS or other optional user system.

Met One takes advantage of Belfort’s proven experience with visibility technology in re-designing this new sensor for applications which require high accuracy over an extended range of visibility. These sensors are designed to provide both accuracy and reliability in a cost effective package. The Model 6400 now features ease of field serviceability. Applications include synoptic stations, lighthouses, highways, resort areas, as well as shipboard and other marine platforms.