Sarasota 200 Open Channel Flowmeter

Ensure accurate, reliable flow measurement with the multi-path configuration and smart transducer technology of the Thermo Scientific™ Sarasota 200 Open Channel Flowmeter.
This flowmeter measures flow directly in open channels without causing obstructions and without the need for weirs or flumes. By calculating flow directly from the measurement of water velocity and depth, it overcomes the inherent limitations of traditional methods of volumetric flow measurement that can be expensive and obstructive and enable drown out in high flow conditions.

Catalog #
Open Channel Flowmeter

Full specifications
Accuracy Overall accuracy typically 2 to 5% of flow reading, depending on site conditions. Transducer frequency 2%, matched pairs to 0.5%
Approach Length Recommended 5x channel width
CE mark Compliant
Channel Shape Programmable cross section
Channel Widths 7.87 in. to 656.17 ft.
Communication Protocols RTU; ASCII Modbus
Communications RS232 for PC communications (1200 to 38400 baud); RS232 for modem (1200 to 19200 baud); 2 x 12 bit isolated 4-20 mA or 1-5 V (programmable); 2 x volt free contacts (programmable); Fault relay
Connections Cable used: URM76 with additional outer polypropylene sheath for continuous immersion with overall diameter 8mm (0.3 in); Star junction box (1 per transducer assembly of maximum 4 transducers); 1 x URM76 cable per transducer connected to star box. Maximum length 5m (approx 16 ft.)1 x URM76 cable per star box connected to flowmeter. Maximum length 300m (approx 1000 ft.)
Data Logging 1 MB capacity; Programmable for function, selectable from measured and calculated parameters (maximum 12); Programmable sampling period 30 secs to 30 mins
Inputs Up to 4 ultrasonic depth transducers; Up to 2 analog depth inputs via 4-20 mA connections (subject to overall maximum of 4)
Description Open Channel Flowmeter
Display 20 character x 2-line LCD
Environmental Rating IP65 waterproof; Suitable for outside installation, 250 kHz, 500 kHz open channel: IP68 continuous immersion to 2 bar (29 psi), 1 MHz open channel or closed conduit: IP68 continuous immersion to 15 bar (217.6 psi)
Flowmeter Standards Complies with ISO 6416 (equivalent to BS3680 pt 3E)
Fluids Tolerates suspended solids up to 2,000ppm; Best performance achieved with minimial weed, aeration, saline and temperature gradients
Hazardous Area Use Applicable to 1 MHz transducers only via 1 x barrier per transducer; Subject to cable restrictions; Transducer: (Epsilon 06 ATEX 2041) II 2 G EEx ib IIB T4; Interface: (Epsilon 06 ATEX 2041) II (2) G (EEx ib) IIB
Height (English) 11.8 in.
Height (Metric) 300mm
Material Front opening, painted, pressed steel casing, 2-line LCD front display; Material: Encapsulated piezo-electric transducers; 250 kHz, 500 kHz: Integral drive circuits and signal amplifiers; 1 MHz: drive circuit and signal amplifier inline (T Box)
Mounting Typically wall mounted; Other mounting options on application, Mounting hardware available to suit open channels of various shapes, and for pipes via internal fittings or 'hot' or 'cold' tapped methods
Software Details Thermo Scientific GAFA Microsoft Windows-based PC
Power Supply 11-30 VDC: running mode consumption at 12 V typically 0.25 A, sleep mode consumption 0.02 A, mean current; dependent on selected intermittent operation; Mains adapter: 90-264 V, Internal battery for standby operation (optional, requires mains adapter); Other power sources on application; Intermittent mode for low power consumption
Quality Assurance ISO 9001:2000
Safe Area Use As standard
Temperature Range Transducers: -20° to +50°C (4° to 122°F); Flowmeter: -10° to +50°C (14° to 122°F)
Transducer Frequency Options 165-655 ft. paths: 250kHz; 15-260 ft. paths: 500kHz; (20 in. to 30 ft. paths: 1MHz)
Velocity Range Bi-directional; Maximum depends on path length e.g., 33 ft./s for 330 ft. path (10m/s for 100m path)
Weight (English) 20 lb. (including battery)
Weight (Metric) 9kg including battery
Item Description Sarasota 200 open channel flowmeter

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    Product Description

    About the Sarasota 200:

    For installation in rivers, open channels, or closed conduits, the Sarasota 200 operates over the full bi-directional flow range without causing obstruction or head loss. While this ultrasonic method is traditionally associated with applications where the water is relatively clean and free from weeds and entrained air, the Sarasota 200 can meet the demands of applications such as sewer flow measurement.

    Leak Detection Application:

    A new leak detection feature employs two flowmeters working together in a master-slave configuration to provide a comparison of upstream and downstream flow measurement. If this measurement exceeds a pre-defined threshold, a series of alarms will begin that culminates with closure of the pipeline. Generally, the pipe is shutdown using a gate or penstock to alleviate ruptures that could lead to catastrophic flooding.


    • Single or dual channel (up to 8 paths)
    • Weatherproof IP65 enclosure
    • Low power consumption
    • ISO 6416 compliant
    • Smart transducer technology
    • Local and remote PC communications
    • Onboard data logging
    • IEC 41 compliant

    Recommended for:

    • Effluent legislation
    • Sewage treatment
    • Abstraction compliance
    • Flood prediction
    • Water resource management
    • Hydroelectric power generation
    • Irrigation
    • Leak detection

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