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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。
The Met One Instruments, Inc. NPM 3 is a forward light scatter laser nephelometer particulate monitor which automatically measures real-time airborne TSP, PM10, or PM2.5 particulate concentration levels.
The NPM 3 features improved reliability and lower maintenance. Each unit uses a serial cable that allows the device to connect to a laptop, data logger, or CCS+ Comet Cloud Modem. The real-time data is accessible for display, logging, review, and reporting instantly or later time.
The monitor contains a 5-mW diode laser operating at 670 nm wavelength. A protective optical housing fully encapsulates the laser beam and optics system within the device.
Data from the NPM 3 can be managed using the supplied copy of Met One’s user-friendly, Windows-based, Comet™ communications terminal software. Comet allows the user to view real-time data and log data to a data file on a computer in .csv format.
The NPM 3 is calibrated using 0.6-micron latex microspheres. These provide an extremely consistent calibration but do not generally match the characteristics of all ambient particulate. A K Factor (multiplier) must be established using a collocated trusted reference source (such as a BAM 1020) for good accuracy and correlation. The default factory K Factor is 1.0.
The K Factor is only valid at the same site and for the same particulate type. If the local particulate source changes, the K Factor may need to be adjusted.
The unit is supplied with a TSP head, Comet software, a mounting bracket, & a hose clamp.
NEED MORE INFORMATION ON THE NPM 3?
➡️ For further technical information on the NPM 3, please read the published article in Aerosol Science & Technology, Fine particle mass monitoring with low-cost sensors: Corrections and long-term performance evaluation, or click HERE to download the pdf.