Sigma 911 Intrinsically Safe / Atex Area Velocity airflow Meter

Description Sigma 911 Intrinsically Safe / Atex Area Velocity airflow Meter

Quick installation and minimum maintenance, the Sigma 911 Intrinsically safe (Atex) airflow meter is ideal for short-term flow studies in hazardous or potentially hazardous environments. And Hach's advanced Sigma Intrinsically safe (Atex) airflow meter Doppler technology means accuracy, even in low flow, full pipe and reversed flow conditions. All without the need for profiling to establish accurate average velocity. Accuracy is further enhanced by a proprietary technology that corrects for the effects of temperature and velocity on level measurement.

Features Sigma 911 Intrinsically Safe / Atex Area Velocity airflow Meter

CSA-NRTL/C, CE & DEMKO certified for operation in Class I, Division I, Groups C & D hazardous locations.

Integrates with Vision® and InSight® software for easy presentation-quality reports.

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 onsite calibration.

A higher level of accuracy, since the 920 automatically corrects the effects of temperature on level measurement.

Patented Drawdown Correction feature to correct the effects of velocity on accurate level measurement.

Easy Installation with a slender 4 1/2" diameter, no profiling required.

NEMA 6P sealed to withstand submergence and prolonged surcharge conditions.

Low Profile, Non-Fouling Probe reduces your need for maintenance and is detachable/interchangeable for ultimate flexibility.

Ideal for:

Short Term Flow Studies in Hazardous or Potentially Hazardous Areas

Sanitary Sewer Evaluation Studies

CSO Studies and Monitoring

Specification for the Sigma 911 Intrinsically Safe / Atex Area Velocity airflow Meter:

Dimensions: 4.5" dia. x 17.625" L (11.4 cm dia. x 44.8 cm L).
Weight: 5.7 lbs. (2.58 kg) with battery.
Enclosure Material: PVC.
Enclosure Rating: NEMA 6P (IP67).
Certification: CSA-NRTL/C, CE & DEMKO certified -Class 1, Div. 1, Groups C & D Intrinsically Safe.
Operating Temperature Range: 0 to 140°F (-18 to 60°C).
Storage Temperature Range: -40 to 140°F (-40 to 60°C).
Power Source: One (12V) Custom lithium battery pack.
Battery Life: 30 days typical with a 15-minute recording interval, 1 level and 1 velocity, data download once per week, at 50°F (10°C) (also affected by site conditions).
User Interface: Optically isolated IBM compatible PC.
Monitoring Intervals: 1, 2, 3, 5, 6, 10, 12, 15, 20, 30, 60 minutes.
Program Memory: Non-volatile, programmable flash, can be updated via RS-232 port.
Time Based Accuracy: ±1 second per day.
Units of Measurement: Level - in., m, cm, ft. Flow - GPS, GPM, GPH, LPS, LPM, LPH, MGD, AFD, CFS, CFM, CFH, CFD, M3S, M3M, M3H, M3D. Totalized Flow - gal, ft.³, acre-ft., L, m³.
Data Storage: Capacity - 593 days of 1 level reading and 1 velocity reading at a 15-minute recording interval. Data Types - Level and velocity. Storage Mode - Wrap or slate.
Communications: Serial connection via optically isolated interface to IBM compatible computer with Sigma data analysis software.
Velocity Measurement Accuracy: Method: Doppler ultrasonic. Transducer Type: Twin 1 MHz piezoelectric crystals. Typical minimum depth for velocity: .8 in. (2 cm). Range: -5 to 20 fps (-1.52 to 6.10 m/s). Zero Stability: <.05 fps (.015 m/s). Accuracy: ±2% of reading. Operating Temperature: 0 to 140°F (-18 to 60°C).