Portable Area Velocity Flow Meter with 1 Submersible Area Velocity Sensor

• 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.

Ideal for:

• Short Term Flow Studies
• Sanitary Sewer Evaluation Studies

Specification Sheet | Manual

Portable Area Velocity Flow Meter, Two Sensor Capability

• Multiple sensors for redundancy, averaging and multiple pipe monitoring.
• Easy installation with fast setup and no velocity calibration required.
• Sampler pacing capabilities, ideal for CSO and storm water.
• Optional rainfall logging feature records and characterizes rain events, a true innovation in water monitoring.
• NEMA 6P sealed to withstand submergence and prolonged surcharge conditions
• Low power draw creates an extended 90-day battery life.
• Advanced, ultrasonic one-MHz Doppler technology avoids signal dropouts and ensures, high levels of accuracy in low-flow, full-pipe, or reversed-flow conditions, without the need for on-site calibration.
• A higher level of accuracy, since the Sigma 920 automatically corrects the effects of temperature on level measurement.
• Patented `Drawdown Correction´ feature corrects the effects of velocity on accurate level measurement.

Ideal for:

• Short Term Flow Studies
• Sanitary Sewer Evaluation Studies
• CSO Studies and Monitoring
• NPDES Stormwater Compliance

Specification Sheet | Manual

Long-Term Portable Area Velocity Flow Meter, Three Sensor Capability

• Multi-point and/or redundant monitoring with a single meter.
• Up to three level and velocity sensors.
• Low power draw creates an extended year-long battery life.
• Optional rainfall logging feature records and characterizes rain events, a true innovation in water monitoring.
• Optional internal modem automates data retrieval, paging and reporting.
• Optional sampler pacing capabilities, ideal for CSO and Storm-water.
• NEMA 6P sealed to withstand submergence and prolonged surcharge conditions.
• Advanced, ultrasonic one-MHz Doppler technology avoids signal dropouts and ensures high levels of accuracy in low-flow, full-pipe or reversed-flow conditions, without the need for on-site calibration.
• A higher level of accuracy, since the 930 automatically corrects the effects of temperature on level measurement.
• Patented drawdown correction feature corrects the effects of velocity on accurate level measurement.
  Multiple sensors for redundancy, averaging and multiple pipe monitoring.

Ideal for:

• Long-Term Flow Monitoring
• Sanitary Sewer Evaluation Studies
• CSO Studies and Monitoring
• NPDES Storm-water Compliance
• Permanent Collection System Monitoring

Specification Sheet | Manual

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.

• CSA-NRTL/C certified for operation in Class 1, Division 1, Groups C & D hazardous locations, DEMKO listed.
• Low profile, non-fouling probe reduces your need for maintenance and is detachable/interchangeable for ultimate flexibility.
• Easy installation with a slender 6.5" in. diameter and no profiling required.
  NEMA 6P sealed to withstand submergence and prolonged surcharge conditions.
• Advanced, ultrasonic one-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 Sigma 911 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.

Ideal for:

• Short Term Flow Studies in Hazardous or Potentially Hazardous Areas
• Sanitary Sewer Evaluation Studies
• CSO Studies and Monitoring

Specification Sheet | Manual

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.

Industry standard MODBUS ASCII protocol has been incorporated into the American Sigma 940 Flow Meter. The implementation of the MODBUS protocol will allow your MMI, SCADA or DCS system to directly communicate with the 940 Flow Meter without the use (or additional cost) of a PLC. Now you can have real-time, read-only access to all available data channels in the 940 Flow Meter.

• CSA-NRTL/C DEMKO listed and certified for operation in Class I, Division I, Groups C & D hazardous locations.
• Multiple sensors for redundancy, averaging and multiple pipe monitoring.
• Telephone and pager alarms for quick notification of system changes.
• Low power draw, with a long, one-year battery life.
• NEMA 6P sealed to withstand submergence and prolonged surcharge conditions.
• Sampler pacing capabilities, to document the extent of overflow problems.
• Advanced, ultrasonic one-MHz Doppler technology avoids signal dropouts and ensures high levels of accuracy in low-flow, full-pipe or reversed-flow conditions, without the need for on-site calibration.
• A higher level of accuracy, since the 940 automatically corrects the effects of temperature on level measurement.
• Patented Drawdown Correction feature corrects the effects of velocity on accurate level measurement.

Ideal for:

• Long Term Flow Monitoring in Hazardous or Potentially Hazardous Areas
• Sanitary Sewer Evaluation Studies
• CSO Studies and Monitoring 

Specification Sheet | Manual

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.

Meters in the American 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 American 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.

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

Models available:

SIGMA 950 Submerged Pressure Flow Meter

SIGMA 950 Bubbler Flow Meter

SIGMA 950 Optiflo Flow Meter

Specification Sheet | Manual

Sigma 980 Permanent 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. 

The 980 Flow Meter also has several features designed to simplify installation, operation and maintenance.  It has eight holes along the bottom of the case in order to provide access to power, sensor, control and communications wiring.  The large LCD graphics display lets you quickly see the information you need, on site without the inconvenience of outdated paper charts.  Industry standard MODBUS ASCII protocol has been incorporated, which will allow your MMI, SCADA or DCS system to directly communicate with the 980 Flow Meter without the use (or additional cost) of a PLC.

The 980 Flow Meter is ideal for:

• Influent Monitoring
• Effluent Monitoring
• WWTP Process Monitoring
• NPDES Stormwater Compliance
• CSO Monitoring
• Long Term/Permanent Flow Monitoring

Specification Sheet | Manual

Portable Doppler Flow Meter

It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 4.0 is fast and easy to operate – you can mount the sensor on the outside a pipe in less than a minute. Use the built-in keypad and calibration menu to set up the flowmeter for your application. The PDFM 4.0 works on any liquid containing bubbles or solids and is recommended for "difficult liquids" like wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. Measures flow through most metal and plastic pipes including PVC, ductile iron, carbon steel and stainless steel.

 The Greyline PDFM 4.0 is AC/DC powered with a built-in battery and charger. With its 4-20mA output you can even use the PDFM 4.0 as a spare transmitter in critical applications. For flow studies and troubleshooting use the built-in 50,000 point Data Logger. Retrieve data logs with 'Greyline Logger' software – included free with each PDFM 4.0. Connect the RS232 output directly to the serial port on your PC or Laptop, or by dial-up connection through modems and phone lines.

• Strap-on Ultrasonic Sensor
• Internal Battery and/or AC Powered
• Fast, Easy Operation
• Built-in 3-Key Calibrator
• Programmable Totalizer
• 50,000 point Data Logger
• RS232 Serial Output and Windows software
• 4-20mA Output
• Adjustable Sensitivity

Specification Sheet

Portable Transit Time Flow Meter

Recommended for clean fluids like water, glycol, oil and most chemicals. Portaflow ultrasonic sensors strap-on the outside of vertical or horizontal pipes from 2" to 40" (50 to 1000 mm) diameter. The ultrasonic signal travels through all common metal and plastic pipe materials. Sensors can be mounted without shutting down flow and there is no obstruction or pressure drop. Flow rate and totalizer are displayed continuously along with battery status, signal strength. Press one key to instantly change the units of flow measurement (e.g. from gallons to liters). Real time flow can be displayed in large numeric values or as a graph.

Calibration is easy with the onscreen menu system. Enter the pipe diameter, wall thickness and pipe material, and the Portaflow calculates the optimum mounting method and separation distance for the sensors. Calibration parameters can be stored for up to twenty different sites so that operators can recall calibration setups from the Portaflow memory.

• Strap-on Ultrasonic Sensors
• Internal Battery and/or AC Powered
• Easy Calibration and Set-up
• 50,000 point Data Logger
• RS232 Serial Output 
• 4-20mA Output

Specification Sheet