Home > Product > Environmental Monitoring > HACH SIGMA & MARSH MCBIRNEY > Hach FL900 Series

SIGMA is a US manufacturer that specializes in AV Flowmeters, Samplers, and Rain 
Gauge instrument. In 1997, Sigma became part of the Hach Company family.

MARSH-MCBIRNEY is a US manufacturer that specializes in Open Channel Flowmeters. For over 35 years, Marsh- McBirney has provided innovative and award winning open channel flowmeters designed for both portable (short-term) and permanent (long-term) flow monitoring applications. In 2006, Marsh- McBirney became part of the Hach Company family.

Flow Logger

Hach FL900 Series

Flow Logger


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.

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



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