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Model 2000
Flow Sensor
Flow Meters & Instrumentation
Model 2000 Flow sensor
Features
Reliable Hall-Effect Sensor - Offers a wide flow velocity range from 0.5 ft/sec to 33 ft/sec. Flow can be measured in either direction. 
No Signal Conditioning Required - Output signal can be sent direct to PLC or computer without the need for additional electronics. 
Rugged Construction - A choice of PVC, PPL or PVDF sensor materials provides high chemical resistance. A sturdy 3-pole DIN-style electrical connector is provided on the sensor as standard.
Versatile Mounting - One sensor for all pipe sizes up to 8". 
High Accuracy - Unique 5-bladed Hall-effect sensor offers an accuracy of ± 1% over the full measuring range (see diagram on pg. 23).
LDM (Low Drag Magnetic) Sensor - The LDM sensor utilizes smaller magnets than other designs for minimal drag and less fouling.
Long Life - Ceramic shaft and bearings for reduced wear, long life.
Easy Installation - A matched Tee or Pipe saddle fitting makes installation quick.
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Principle of Operation
Principle of Operation
FloSite flow sensors are equipped with a Halar 5-bladed rotor (1) with a permanent magnet (2) integrated into each blade. Ceramic bearings (3) are embedded on each side. Together with a ceramic shaft (4), these bearings provide extremely long life at high flow velocities and high chemical resistance.

As the magnet (2) in each blade passes by the Hall-effect transducer pickup (5) an output pulse is generated. This output signal is processed by the sensor's electronics (6) to a square wave output with a frequency that is proportional to the rate of rotor rotation and thus flow velocity. Unlike other sensors with sine wave outputs, the FloSite sensor's square wave output signal is not reduced at low flow rates and can be connected directly to a PLC without signal conditioning.
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Description
As the heart of the flow monitoring system, the FloSite Model 2000 sensor offers high accuracy and excellent low flow performance, as well as long life. lt produces a square-wave output signal with a frequency proportional to the flow, which can be transmitted up to 325 ft to a display unit without signal conditioning. A specially designed pipe fitting makes installation easy.

Unlike other sensor designs that utilize a four-blade rotor, the Hayward FloSite rotor has five blades for 20% more contact with the process fluid and thus higher accuracy at lower velocities. It also employs an LDM (low drag magnetic) design using smaller magnets for less chance of fouling from accumulation of any metallic particles in the process.

Hayward FloSite sensors are available in a choice of three corrosion-resistant materials: PVC, PPL, or PVDF. The Model 2000 sensor output can be sent directly to a PLC or to a versatile range of Hayward remote-mounted flow monitors. The same flow sensor technology is also used in the Hayward Point-of-Use transmitters (see pg. 14) where the display indication is integrally mounted to the sensor.
Technical Data
Type: Insertion paddle flow sensor, Hall-effect method of flow measurement
Flow Velocity Range: 0.5 to 33 ft/sec (0.15 to 10 m/sec), flow measured in either direction
Measuring Range
Pipe Size Range: 1/2" to 8"
Output Signal: Square wave, 5 to 24 V dc P-P (depending on input voltage)
Output Frequency: Approximately 12.8 Hz/ft/sec (42 Hz/m/sec)
Output Signal Transmission: 325 ft (100 m) without conditioning
Accuracy: ±1% of indicated flow over the full calibrated range
Repeatability: ±0.5% over calibrated range
Linearity: ±1% over calibrated range
Viscosity Range: 0.5 to 20 centistokes
Maximum Percent Solids: 10% (with particulate size not to exceed 0.5 mm length or cross-section
Power Requirement: Any supply voltage between 5 and 24 V DC. Note: If used with digital panel indicators or batch controller (pgs. 12 or 16), sensor is powered from indicator/controller Electrical Connection: NEMA 4X (IP65), 3-pole DIN43650 connection with ground pin, cable gland for 4-conductor shielded cable. Also accepts 1/2" NPT conduit fitting

Pressure and Temperature Ratings

Sensor Materials:

 
  • Flow Sensor Body: Choice of PVC, PPL, or PVDF
  • Rotor: 5-bladed E-CTFE (Halar) with magnet inserts
  • Rotor Shaft: Ceramic
  • Rotor Bearings: Ceramic
  • O-Rings: EPDM standard with PVC or PPL bodies (Viton optional). Viton standard with PVDF sensor
    •  Required Installation Fittings:
    T-fittings in PVC (1/2" to 1-1/4"), Pipe saddles in PVC (1-1/2" to 8")
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