Using a submerged AV monitoring system to capture wastewater flow data has been an efficient approach for decades, but at Hach Flow we’re always challenging ourselves to find ways to improve. It’s this continual commitment to product innovation that led to the creation of the Hach FL900AV Flow Meter . This powerful meter, with our new AV9000 Analyzer Module, provides “cleaner,” more precise data than ever before. With advanced signal processing and filtering options, the AV9000 Analyzer expands the applicability of the sensor into more difficult applications.

What else makes this new meter special? Well, for starters, the digital signal used by the AV9000 module dampens EMF and RFI noise, resulting in smoother, more accurate level measurements. And its velocity measurements can even account for water temperature swings and salinity concentrations. Plus, advanced analyzer diagnostics allow you to verify that the sensor is working properly even before you leave the site, giving you peace of mind.

So, if you’re looking to measure flow with a submerged AV sensor for the first time, or simply need to replace an aging submerged AV logger, the Hach FL900AV Flow Meter takes accuracy to a whole new level. And being right always looks good.

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:

  • 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

* 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:

  • Auxiliary Port to connect an automatic sampler or an external power supply
  • 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

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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