The Hach FL900 Series Flow Logger revolutionizes remote, open channel flow monitoring by providing rugged and reliable innovative solutions for any sewer flow measurement challenge. From pairing with the industry-leading non-contact FLO-DAR AV Sensor to utilizing wireless communication options with free data hosting, the Hach FL900 is designed to reduce your monitoring costs, increase your efficiency, and provide better data with less hassle than you ever thought possible. Armed with accurate data from a full suite of sensors, and more time for insightful analysis, the Hach FL900 Series Flow Logger empowers you to begin proactively developing solutions before issues rear their ugly heads.

Power Source: Two (2) or Four (4) lantern batteries with up to 306 days* of battery life
Data Transmission: USB or RS232 (MODBUS RTU) (Wireless data transmission available – See details in Options below)
Compatible Software: FSData Desktop Instrument Manager

Additional Features:

  • 1, 2 or 4 plug-and-play ports to use with a broad array of sensor-types – Reduces inventory cost & simplifies inventory management
  • On-site verification of flow meter performance using advanced diagnostics
  • Step-by-step calibration guides for easy and precise set ups
  • Advanced signal processing and filtering options reduce noise in difficult applications
  • Dynamic logging intervals automatically enables the delivery of greater resolution flow data during high flow periods and battery/data volume conservation during low-flow seasons
  • Auxiliary Port to connect an automatic sampler or an external power supply

* Dependent upon number of batteries, sensor(s) type usage, and logging and call-in frequency

Power Source: External (AC, solar, or long-life battery) power for longer deployments
Data Transmission: Cellular wireless modem with free data hosting for real-time data access
Compatible Software: FSDATA Online Data Manager (requires wireless data transmission)
Additional Options:

  • Versatile mounting options
  • Rain gauge connection

Replaces the Sigma 910, Sigma 920, Sigma 930, and Sigma 930T Loggers, as well as the Marsh-McBirney FLO-LOGGER and FLO-LOGGER XT

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