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Sigma 911 Intrinsically Safe Portable Area Velocity Flow Meter

OBSOLETE ITEM

Sigma 911 Intrinsically Safe Portable Area Velocity Flow Meter
Product #: 5150

OBSOLETE ITEM

CSA-NRTL/C Certified and ATEX Certified

The Sigma 911 CSA Area Velocity Flow Meter is CSA-NRTL/C certified for operation in Class I, Division I, Groups C & D hazardous locations.
The Sigma 911 ATEX Area Velocity Flow Meter is certified in accordance with the ATEX directive 94/9/EC by Zelm Ex for use in potential explosive atmospheres.

Easy Installation and Maintenance

The slender 6.5-inch diameter data logger of the Sigma 911 flow meter means it can install almost anywhere. The Submerged Area Velocity sensor is easy to install and requires little maintenance. Single point calibration can be performed on-site without a bucket of water! The bottom
face of the probe is beveled to eliminate the need for additional mounting clips in 8- and 10-inch pipes. An optional oil-filled probe greatly reduces sensor fouling and associated maintenance.

Ideal for Harsh Environments

The data logger for the Sigma 911 flow meter is NEMA 6P sealed to withstand rugged sewer and storm water environments including submergence and prolonged surcharge conditions. Its compact size makes it highly portable and easy to store.

Advanced Technology for Accuracy

The Sigma 911 flow meter uses a patented* “Drawdown Correction” feature that corrects the effects of velocity on accurate level measurement. 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 hydrodynamically shaped sensor and side-mounted
cable reduce turbulence to ensure optimum monitoring performance.

Applications

The Sigma 911 CSA or Sigma Model 911 ATEX Area Velocity Flow Meter is ideal for short-term flow studies in hazardous or potentially hazardous areas, sanitary sewer evaluation studies, Combined Sewer Overflows (CSO) studies, and industrial discharge monitoring.