Sewer Flow Monitoring Services

With Data Delivery Services (DDS), you’ll never have to visit flow monitoring sites again. We’ll install our award-winning, web-enabled flow meters and handle any maintenance. Plus, you’ll have 24/7 access to complete and unedited data via any web browser.

Flo-Dar

Flow Meter for Sewers & Open Channels

The Flo-Dar Family of flow meters provide a revolutionary approach to open channel and sewer flow monitoring. Flo-Dar combines digital doppler radar velocity sensing technology with ultrasonic pulse echo level sensing to remotely measure open channel flows.

Flo-Dar's unique non-contact measuring technology means trouble-free sewer flow monitoring. It even won the Water Environment Federation's Innovative Technology Award!

Like all Hach Flow products, Flo-Dar sets the standard for ease-of-use, accuracy, and reliability. Flo-Dar accuracy has been independently confirmed by Alden Labs as well as the satisfaction of thousands of Flo-Dar users. Read our white paper, Understanding the Flo-Dar Flow Measuring System for more details and verified test data. Benefits: No Sensor Cleaning Reduce Confined Space Entries by 90% or More Personnel Have No Contact with the Flow During Installation Maintenance Caused by Sensor Fouling is Eliminated Optional Site Profiling for Even Higher Accuracy Field Replaceable/Interchangeable Sensors and Monitors Perfect Solution for Difficult Flow Conditions: Surcharge Flows Flows with High Solids Content High Temperature Flows Caustic Flows Large Man-Made Channels High Velocities Shallow Flows

For Specifications Choose a Flo-Dar™Model Below:
Flo-Dar™ for Permanent AC/DC Powered locations	Flo-Dar™ XT for permanent or temporary battery powered locations and with Remote Communications	Flo-Dar™ for temporary battery powered locations

Flo-Tote™ 3

Building on the success of thousands of installations worldwide we are pleased to introduce the "Flo-Tote™ 3" - the new generation of the world's most popular sewer flow meter. Marsh-McBirney’s "Flo-Tote™ 3" portable flow meters are based on the original and unsurpassed velocity/area measurement sensors and techniques. Continuous product innovation has made it possible to combine proven sensor design with state-of-the-art technology. In addition to the accuracy and ease-of-use our customers have come to expect the "Flo-Tote™ 3" offers some exciting new features: Disconnectable sensor for quick and easy replacement Interchangeable with Flo-Tote™sensors Room to store more data with a storage capacity increased to 64K Extended battery life Pocket PC compatible for data collection convenience

Flo-Mate™ Portable Velocity Meters Lightweight, rugged field construction with no moving parts, water resistant electronics, data storage/recall capability, battery operation, and fixed period averaging make it the clear choice in velocity flow meters. Ideal for: Rivers & Streams Flume/Weir Calibration Mining Channels Irrigation Channels Sewers Most Open Channel Flow Applications   Free Carrying Case! 5 Year Sensor Warranty!

Sigma 910

Area Velocity Flow Meter

The Sigma 910AV measures average velocity directly without the need for time consuming flow profiling, significantly reducing the cost of installation and operation. With a compact 4 1/2 x 18" design, weighing less than 8 lbs (with battery), the 910AV is one of your best options for remote environments. This meter will log level and velocity data for more than 30 days without changing a battery, and its sealed design provides superior system protection against surcharge conditions.   Low-profile probe reduces maintenance and is detachable/interchangeable for ultimate flexibility. Easy installation with a small, 4½ in. diameter and no velocity calibration required. NEMA 6P sealed to withstand submergence and prolonged surcharge conditions. Advanced, ultrasonic on-MHz Doppler technology avoids signal dropouts and ensures, without the need for on-site calibration, high levels of accuracy in low-flow, full-pipe, or reversed-flow conditions. A higher level of accuracy, since the 910 Portable Area Velocity Flow Meter automatically corrects the effects of temperature on level measurement. Patented `Drawdown Correction´ feature corrects the effects of velocity on accurate level measurement.

Available Sigma Sensors Submerged Pressure AV Sensor

Ideal for:

	Short Term Flow Studies
	Sanitary Sewer Evaluation Studies

Sigma 950 Opti-Flo

Area Velocity Flow Meter

The Sigma 950 and 950 AV Series Flow and Water Quality Meter provide portable and/or permanent single-channel monitoring plus water quality testing, process control interface, and a digital display. The Sigma 950 and 950 AV Optiflow models offer maximum flexibility for multiple applications. Up to three different level sensor technologies and velocity are available in one meter. For applications requiring more than flow, the 950 optionally monitors rainfall, pH, temperature, ORP, dissolved oxygen and/or conductivity. In addition, the 950 has analog inputs for data-logging from other instruments, for example, total suspended solids monitors. You can also control samplers, pumps, or other equipment based on flow or selected parameter(s) exceeding high/low set points with relay outputs.

Meters in the Sigma 950 Series are versatile to meet your needs - customize your meter to specific site conditions easily. The large LCD graphics display lets you quickly see the information you need quickly, on-site, in your choice of 10 languages, and without the inconvenience of outdated paper charts; you'll no longer need to replace pens, paper, or service mechanical recorders.

Industry standard SCADA MODBUS ASCII protocol is included in the Sigma 950 Flow Meter Series. 4-20 mA outputs are also available: this allows flexible integration with a SCADA system. You can have real-time, read-only access to all available data channels in the 950 Flow Meter.

	Keypad and large graphics display makes using laptops in the field optional. A single keystroke provides an instantaneous flow summary and review of all program settings.
	Three level measurement technologies available: ultrasonic, submerged, or Bubbler.
	Battery or AC powered.
	Water quality data helps identify upsets that may affect your plant. An OptiFlow model provides maximum flexibility with three different level technology choices plus velocity.
	Doppler area velocity flow measurement.
	Sampler pacing ability to document the extent of overflow problems.
	Optional rainfall logging to record and characterize rain events.
	Remote communications capability via modem or RS-232.
	Enough memory to log more than 18,000 data points-expandable to 116,000 data points or over one year of flow data at a 5-minute logging interval.
	Flash memory for software enhancements without replacing e-proms or returning meter to factory.
	Optional four user-assignable alarm relays.
	Optional two user-assignable 4-20 mA outputs, allowing the meter to be part of a current loop able to drive recorders, samplers, metering pumps, chlorinators, and other devices or SCADA integration.
	Rugged, environmentally sealed: the Sigma 950 is NEMA 4X-6 rated and can survive submersion and corrosive gases-even with the door open.
	Data can be downloaded in any of three ways: Palm-sized Data Transfer Unit (DTU); Built-in modem to transmit data over telephone lines; Direct RS-232 link to a PC utilizing data analysis software

Ideal for:

	Long Term or Permanent Flow Studies
	Sanitary Sewer Evaluation Studies
	CSO Studies and Monitoring
	NPDES Stormwater Compliance
	Industrial Compliance Monitoring Applications involving frequent moving of meter to different site conditions

Available Sigma Sensors
Submerged Pressure AV Sensor	Ultrasonic Sensor	Wafer Velocity Sensor	AV Bubbler Sensor	In-Pipe Ultrasonic Sensor