• Read accurate flow in manholes, collection systems and other open channels
• Noncontact ultrasonic and radar technologies keep sensor out of the flow—resists fouling
• IP68 rated construction

FLO-DAR flow sensors provide noncontact, maintenance-free portable or permanent sewer flow monitoring. Ideal for open channel flow monitoring, they combine advanced digital doppler radar velocity sensing technology with ultrasonic pulse echo depth sensing to continuously measure flow. Pair them with Hach FL900 series flow loggers (wireless or standard) for portable, battery-powered monitoring.

FLO-DAR sensors are ideal for continuous operation in the most difficult conditions, including flows with high solids content, high temperature, shallow and caustic flows, large man-made channels, and high velocities up to 20 ft/s. Because you mount them out of the process flow, they won't become fouled by grease or debris—which means they won't miss any flow data. Sensor typically remains accurate and stable for three years without site calibration, even across all ranges from low flow depths up to surcharge conditions.

Initial installation is simple with available mounting brackets (no in-pipe bands or rings necessary) or temporary jack bar spanner mounts. Subsequent sensor removal and retrieval is even easier with accessories like telescoping pole with hook, eliminating need for confined space entry. All mounting hardware and accessories sold separately.

Standard noncontact flow sensors have a measuring depth range of 5 feet; contact us for models with depth ranges up to 18 feet, as well as intrinsically safe sensors.

For a complete system, order a standard noncontact FLO-DAR sensor, installation hardware, sensor connecting cable, FL900 flow logger.

• Compatibility: Hach FL900 flow logger
• Depth measurement: ultrasonic, 0 to 60"
• Velocity measurement: pulsed radar, 0.75 to 20 ft/s
• Power: provided from connected logger/meter
• Temperature: 14 to 122°F