• FreeFlow Sensor, Differential Flow Sensors, Segmented Wedge Flow Meters, Lake MonitorsACCURATE & ECONOMIC FLOW SENSOR
    Minimally invasive, low cost segmented wedge flow sensor. Used to monitor and control process water.

  • NO MOVING PARTS
    The segmented wedge element provides a simple and reliable restriction for sensing flow as related to pressure differential

  • UNRESTRICTED MOUNTING
    Allows the designer to install the meter in any orientation – horizontal, vertical or inverted.

  • COMPACT AND RUGGED DESIGN
    Measures less than 10" long and 3-1/2" wide, with a flanged mounting base for simple installation.

  • MULTIPLE FLOW RANGES AVAILABLE
    The FreeFlow™ Sensor is offered with several ranges of calibration to accommodate the requirements typical to process water applications.

  • MULTIPLE PORT SIZES
    Standard selection of NPT ports reduces the amount of adapters required for installation.

  • LOW-COST PRECISION
    Measuring accuracy of ±2% of range and repeatability of ±1/2%.


Engineering Specification

The FreeFlow Sensor Shall:

  • Use the segmented wedge differential producer to measure flow rate as related to pressure.

  • Not require inlet or outlet straight plumbing, or require vertical pipe mounting.

  • Have a measuring accuracy of ±2% of full scale with ±1/2% repeatability.

  • Be Lake Monitors No. FF– _ _ _– _ _ _– _ _

Materials of Construction

End Ports

PVC

Wedge Element

PVC

Pressure Sensor

Polyetherimide

Electrical Enclosure

Polyetherimide

Indicator

Polysulphone


Performance

Measuring accuracy:

±2% of full-scale

Repeatability:

±1/2% of full-scale

Full Scale Flow Measuring Range:

5-15 GPM (19-57 LPM)

Turn Down Ratio (All Ranges):

8:1

Maximum operating pressure:

125 PSIG (8.6 bar)

Maximum operating temperature:

170°F (76°C)

Standard Calibration Media:

Tap Water @ 70° F


Electronic Specifications

Electronic output:

0-5 VDC (Standard) - 0-10 VDC (Optional)

Power Requirements:

12-35 VDC

Maximum Current Consumption:

< 50mADC

Minimum load resistance:

1000 Ohms

Maximum transmission distance:

< 200 feet

Resolution:

Infinite

Response Time:

< 500 mS to 90% (step change)

Protection:

Short circuit, transient and reverse polarity


Mechanical Size Code
FreeFlow CAD

DIM

3/8" Female NPTF

1/2" Female NPTF

3/4" Female NPTF

A

6-7/8" (175mm)

6-7/8" (175mm)

7-1/2" (191mm)

B

2-7/32" (57mm)

2-7/32" (57mm)

2-7/32" (57mm)

C

1-3/32" (28mm)

1-3/32" (28mm)

1-5/16" (34mm)

B

5-1/4" (134mm)

5-1/4" (134mm)

5-1/4" (134mm)