Our most powerful monitoring system combines the convenience of wireless data delivery with the intelligence of non-contact flow monitoring. Using wireless Hach FL900 Series Flow Loggers and non-contact FLO-DAR AV Sensors, this system captures flow data with a high-level of accuracy, dramatically reduces required maintenance, and significantly limits the risk of lost data due to sensor downtime. And while all these factors mean less cost and hassle when it comes to monitoring your collection system, the greatest benefit might just be the ability to see your data, in real-time, from anywhere via our FSDATA Online Data Manager software. Empowered with accurate and timely flow data, you’re prepared to make smart, efficient and effective decisions about your system.

Hach FL900 Series Flow Logger

  • Extremely rugged to handle harsh environments
  • Cellular wireless modem for real-time data access
    • Carriers available include Verizon, AT&T, Sprint & Rogers
  • Four sensor ports for any Hach sensor
  • Rain Gauge port
  • COM port for direct meter communication or access to MODBUS


  • Non-contact flow monitoring reduces sensor fouling and downtime
    • Utilizes advanced digital Doppler radar to measure velocity and ultrasonic technology to measure level
  • The surcharge level sensor and Surcharge Velocity Sensor (SVS) continue to deliver data even during surcharge events

FSDATA Online Data Manager

  • Connects with wireless FL900 Series Flow Loggers to present real-time data 24/7
  • Map-view dashboard shows meter locations and status with color-coded markers
  • Intuitive drop-down menus make site navigation easy and efficient
  • View flow data in a variety of tabular spreadsheet or graphical formats
  • Easily generate summaries and reports with database-organized data
  • Web service option for integration with SCADA or other databases, including both real-time and historical data
Online Calc

Online Calculator

On-line open channel
& full-pipe flow calculator for pros in the water & wastewater field.

» Calculator link

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P.O. Box 389, Loveland, CO 80539-0389 U.S.A.
Toll Free US & Canada • 970.622.7120 Outside US & Canada • 800.635.1230 24/7 Technical Support