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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’ ES-642 Remote Dust Monitor is an industrial air-quality sensor designed to provide real time particle concentration measurements in both indoor and outdoor environments.
Our ES-642 measures particulate concentration using a highly sensitive forward scatter laser nephelometer, which has a measurement range of 0 to 100 mg/cubic meter (0 to 100,000 μg/cubic meter). As supplied, the ES-642 provides TSP particulate monitoring. Optional sharp-cut cyclones are available for PM1, PM2.5, or PM10.
The ES-642’s serial and analog outputs support a wide variety of data collection systems. Serial outputs are MODBUS and basic ASCII via RS-232 or RS-485. Analog outputs include both 0-10 volts and 4-20 mA.