FSS Flow Sampling System

Price$4,044.00 (US Only)



In Stock 0 - Available for Backorder

Global Water's Flow Sampling System is a unique water monitoring package. This package includes an easy-to-use lightweight composite water sampler, an open channel flow monitor, and a data recorder that includes software, allowing easy upload of data to a laptop, desktop, or tablet. This compact package is portable for field installation and fully customizable to meet your monitoring needs.

Includes flow-proportional WS700 composite water sampler and FC220 open channel flow monitor. NOTE: Does not include water level sensor or datalogger.

  • Overview


    • Easy-to-use interface with user selectable flow tables
    • Accepts any 4-20mA water level sensor's input
    • 4-20mA output signal for recorders or displays
    • Relay outputs for alarms, sampling, or datalogging
    • Water resistant enclosure

    The flow meter measures water depth using any 4-20mA water level sensor's output including Global Water's highly accurate submersible pressure transducer or ultrasonic water level sensor and the flow meter's powerful microprocessor instantly calculates and displays water flow and totalizer values in user selectable units using one of several water flow calculation modes. The Open Channel Flow Monitors have an 8-button keypad that easily guides you through the versatile setup menus.

    Open Channel Flows

    For any open channel that is free flowing, there is a specific relationship between depth of water and flow rate. Whenever a given depth occurs, there will always be the same water flow. Therefore, if the flow rate is known for each depth, a depth-to-flow relationship can be constructed. The Open Channel Flow Monitor supports a large number of different types of flow calculation modes. Over 40 preprogrammed flume and weir tables are included with the open channel flow meter. For monitoring in round pipes and open rectangular channels; the water flow meter's Manning's Equation mode allows the user to enter their own parameters for material, slope and pipe or channel dimensions. The open channel flow monitors also allow you to define standard flow equations, which can calculate flow for almost all flumes and weirs. Another mode lets the user enter parameters into the water flow meter for a best fit 3rd order polynomial which is useful for calculating flow based on empirical data and lookup tables (see article on Stream Flow Gauging). In addition, one (1) factory programmable lookup table can be permanently stored in the open channel flow monitor's processor memory for monitoring in applications where a single equation can't accurately predict flow, such as streambeds and open channels with complicated geometry. A 16-character name can be programmed into the FC220 water flow meters by the user to identify the installation site or show other information about the configuration.

    Depth Measurement

    Global Water's standard open channel flow monitors can measure flow depth with any 4-20 mA water level sensor including the highly-accurate WL400 Water Level Sensor, which is a fully submersible water level sensor constructed of stainless steel. Any water level sensor range can be used with the flow meter, however a sensor with a range near to your largest expected water level change will give you the best accuracy. Submersible pressure transducers should be mounted slightly below the "zero" flow depth of the open channel, upstream from the throat of the flume or weir. For open channels with no primary device, the sensor should be mounted below the lowest expected water depth. Because the open channel flow monitor accepts a 4-20 mA input signal it can be mounted up to 3000 feet away from the water level sensor.

    Global Water also offers an ultrasonic water level sensor that allows the Open Channel Flow Monitor to measure semi-solid flows or flows that are not suitable for a standard submersible pressure transducer. Global Water recommends that the ultrasonic sensor option only be used in areas where AC power is available. You should strongly consider using a submersible pressure transducer with your open channel flow monitor for applications that are in areas without AC power.

    Open Channel Flow Monitor Display

    The Open Channel Flow Monitors display water flow with up to 7 digits allowing for very large flows to be displayed. The water flow meter's totalizer records up to 9 digits of flow volume in non-volatile memory, and is password protected from reset. Available volume units are cubic feet, gallons, million gallons, cubic meters and liters; time units include seconds, minutes, hours and days. This allows the open channel flow meters to display flow in 20 different user defined units. Water level is calibrated and displayed in feet, inches, meters or centimeters; and a water level offset function allows the measured water level to be adjusted to compensate for variations in the water flow meter's sensor installation.

    Open Channel Flow Monitor Output

    The water flow meters have four independent relay outputs for triggering external devices like water samplers and monitoring devices. The open channel flow monitor's relays can be separately programmed to trigger based on volume per pulse, and threshold settings can be used to limit triggering to flows above preset levels. There is also an accurate and scalable 4-20mA output provided for monitoring the flow using data loggers and PLC devices. An internal USB data logger is available as a factory option for the open channel flow monitor to allow the historical flow data to be recorded, as well as the exact time of each relay trigger event. Free software is provided for programming the data logger, downloading flow and relay data, and exporting to spreadsheets. The water flow meters have programmable power saving features that allow the supply current to be reduced, which is important in remote monitoring applications.

    Water Flow Meter Enclosure

    The enclosure is made of weather resistant injection molded plastic. It is suitable for use in a wide variety of environments. The enclosure can be wall-mounted and fitted with conduit for sensor and power connections, if required.

  • Specifications
    Flow Sampling System Composite Water Sampler  
    Sample Size 15 composite sample sizes from 50ml to 2 liters plus a Full Bottle discrete setting (Approximate sizes at 4 foot head)
    Operating Temperature

    32° to +158°F (0° to +70°C)

    Materials Enclosure: Expanded UV protected PVC
    Bottle: 2.5 gallon Polyethylene
    Pickup Hose: 15 ft (4.6 m) reinforced PVC 1/4 inch ID polyethylene flexible tubing section with intake strainer
    Pump Tubing: Norprene 1/4 inch ID, 7/16 inch OD
    Sample Pump

    Flow Rate: 1000 ml per minute at a 4 foot head
    Type: Peristaltic
    Maximum Lift: ~20 feet (6 m)


    Rechargeable 12V 5 AH Gel Cell

    Battery Life ~1 hour, continuous pumping under load


    3 months while still retaining enough power to run the pump to capacity

    Flow Sampling System Open Channel Flow Monitor  

    16 character x 2 line LCD backlit, 8-button tactile keypad

    Capacity Flow: 7 digit maximum
    Totalizer: 9 digit maximum
    Level: 5 digit maximum
    Display Resolution 3 decimal places maximum, Auto-adjusting
    Accuracy Sensor accuracy + equation/table error + 0.1% + 1 digit
    Units Level: Feet, inches, meters, centimeters
    Volume: Cubic feet, gallons, million gallons, cubic meters, liters
    Time: Seconds, minutes, hours, days
    Flow: 20 Combinations of volume and time units above
    Level Sensor Input 4-20mA 2-Wire or 3-wire, 0-5VDC, 0-1VDC
    Output One 4-20mA scalable, 4 independent SPDT relays (8A @ 250VAC, 5A @ 30VDC resistive)
    Power 12VDC or 18-24VDC Input, +/-10%
    Current Draw 150mA Maximum, <13mA in Power Saving Mode
    Equation Formats  
    Manning's equation for round pipes

    Manning's equation for rectangular pipes

    Standard flow equation Q=A*(B+Ch)D
    3rd order polynomial


    Pre-defined Tables  
    Parshall 1", 2", 3", 6", 9", 12", 24", 36", 48", 60", 72"
    Palmer-Browlus (4D)

    4", 6", 8", 10", 12", 15", 18", 24", 30", 36"

    H 0.4HS, 0.6HS, 0.5H, 0.75H, 1.0H, 1.5H, 2.0H



    V-notch: 22.5°, 30°, 45°, 60°, 90°, 120°
    Rectangular: 1', 2', 3'
    Cipolletti: 1', 1.5', 2', 3', 4'

    NOTE Table values are calculated based on specific flow equations.

    Custom Look-Up Table

    One, Factory programmable only, You must provide Global Water with a depth to flow equation or look up table at time of order.  Please allow for longer lead times.

    Flow Sampling System Datalogger  

    FSS100 does not include datalogger

    Memory Non-volatile flash memory
    Power 12VDC rechargeable battery
    Standby Current 70uA Typical
    Logging Current 5mA Typical
    Analog Sensor Inputs

    Resolution: 12-Bit, 4096 Steps
    Sensor Warm-up Time: Programmable, 0-60 Sec
    FSS200: Flow rate + relay state + battery voltage monitor
    FSS300: 5 Input channels + flow rate + relay state + battery voltage monitor

    Digital Inputs Maximum Input Voltage: 24VDC
    Maximum Frequency: 100Hz
    Minimum Pulse Width: 2mS
    Maximum Count: 65,535 (16-Bit)
    FSS200: None
    FSS300: 2
    Sample Now Input Sample-on-Demand input, software enabled (FSS300 only)
    Maximum Input Voltage: 24VDC
    Minimum Pulse Width: 2mS
    Sample Modes

    Fixed Interval Programmable from 1 Sec. to >1 Year
    High Speed 10 Samples per second
    Logarithmic Sample Rate (Approximation)
    Exception (Log only on deviation from previous reading)

    Storage Capacity FSS200: 81,759 Recordings for all inputs plus time stamp
    FSS300: 40,879 Recordings for all inputs plus time
    Data Overwrite: Select memory wrap or unwrap (unwrap will stop logging data once memory is full)
    Communication Ports

    FSS200: USB Type B connector
    FSS300: RS-232 DB9 or USB Type B
    Selectable Baud Rates: 9600, 19200, 28800, 38400, 57600, 115200


    Synchronizes to the time and date of user's computer

    Operating Temperature Industrial, -40 to +185°F (-40 to +85°C) (Battery may not apply)
    Data Logger Software  
    Compatible with Microsoft's Windows 98, ME, 2000, NT, XP, Vista, and 7

    Windows and Excel are trademarks of the Microsoft Corporation

    Tabular Display/Printout

    Data in standard spreadsheet format (.CSV)

    Programmable alarm start and stop times

    Field calibration software and help files included
    Enclosure 22x17x9 inch (56x43x23 cm) (HxWxD)

    22lb (10 kg)


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