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 Hach Sigma Portable Area Velocity Flow Meters
Portable and Intrinsically Safe Area Velocity Flow Meters Models 910, 911, 920, 930 & 940. Multiple area velocity sensors on most models combine with extended battery life to provide unparalleled performance and value in an affordable meter.
 Hach 910 Area Velocity Flow Meter
The Sigma 910 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 910 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.
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Hach 911 Intrinsically Safe Portable Area Velocity Flow Meter
With quick installation and minimum maintenance, the Sigma 911 Portable Area Velocity Flow Meters ideal for short-term flow studies in hazardous or potentially hazardous environments. American Sigma´s advanced Doppler technology is accurate, even in low-flow, full-pipe, and reversed-flow conditions. There is no need for profiling to establish accurate average velocity. The Sigma 911 accuracy is further enhanced by a proprietary technology that corrects for the effects of temperature and velocity on level measurement.
Specifications
Hach 920 Area Velocity Flow Meter
The Sigma 920 Area Velocity Flow Meter can be used in portable or permanent applications and is available with up to two independent level/velocity channels. You can measure level and velocity in two channels or velocity in one and level in another. And, With American Sigma´s pager communication, you can be alerted to overflows, bypasses, or a change in the flow pattern. Choose from submerged pressure transducer/velocity sensor or American Sigma In-Pip Ultrasonic Depth Sensor combined with a "wafer-thin" velocity sensor that provides greater accuracy in shallow flows.
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Hach  930 Long-Term Area Velocity Flow Meter
American Sigma's 930 Long-Term Area Velocity Flow Meter - our most advanced flow meter - supports three interchangeable sensors, long battery life, and increased data storage, and offers optional interfaces with samplers and modem capability. The Sigma 930 Long-Term Area Velocity Flow Meter is designed for long-term/permanent flow studies with approximately 365-day battery life and a strong NEMA 6P PVC enclosure. Permanent collection system monitoring can now be done confidently, within an affordable budget.
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 Hach 940 Area Velocity Flow Meter, Intrinsically Safe
The American Sigma 940 Intrinsically-Safe Flow Meter supports dual sensors, interfaces with samplers, has a long battery life, and offers increased data storage and optional modem capability. The American Sigma 940 Flow Meter is the safest investment for your sewer and your budget. With the 940, remote monitoring becomes a way of life. Its rugged design, low-profile probes and long battery life significantly reduce site visits. Choose up to two area velocity sensors, or one area velocity and one level backup. Whether you're experiencing redundancy in a single pipe or level and velocity in separate pipes, you´ll profit from new performance levels in a single meter.
Specifications
Hach  950 Bubbler Flow Meter
The American 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 American 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 datalogging 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.
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Hach  980 Permanent Ultrasonic Flow Meter
The 980 Flow Meter provides the versatility needed to handle a wide range of applications and site conditions. It has been designed to use three different sensing technologies so that you can choose the most appropriate one for your specific flow situation. In addition, the flow meter can connect to a wide variety of optional peripheral devices such as 4-20mA outputs, analog inputs, mechanical totalizer, rain gauge, sampler, pH sensor and modem that allow you to customize the 980 to your particular site needs.
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