FIEDLER > Flow measurement > Tipping bucket flowmeter > Bucket flowmeter > PF500 – Paddle-Type Tipping-Bowl Flowmeter
Bucket flowmeter

PF500 – Paddle-Type Tipping-Bowl Flowmeter

The PF500 flow meter’s robust stainless steel construction consists of two interconnected cups, each with a capacity of 750 ml, which are mounted on a rotating shaft. Using rubber stops and a balancing mechanism, the flow meter is calibrated so that the cups tip over when the water volume reaches 500 ml. Each time the cups tip over, the relay contacts close briefly, and this event is then stored in the connected data logger.

  • Monitors water flow in the range of 0 to 5 L/min
  • The flow meter does not require a power supply (pulses can be recorded over long periods in a device powered solely by a battery)
  • The flow meter requires a vertical head of at least 250 mm at the measurement point and a directed water inlet above the center of the flow meter
  • The flow meter’s durable stainless steel construction is not susceptible to freezing
  • The design features two interconnected chambers (2 × 750 ml)

Description

The pulsed flowmeter with a 500-ml tilting double-paddle is designed to monitor low water flow rates in the range of 0 to 5 l/min. The tipping-bucket mechanism can operate even at higher flow rates; however, the measurement error resulting from the measurement principle used increases disproportionately (the flipping time is influenced by the inertia of the filled paddle, the kinetic energy of the inflowing water, the continued inflow even during the flipping time, and water splashing at higher flow rates).
When connected to a H3, H1, H7, or STELA telemetry units, this robust flow meter can be used to monitor instantaneous flow as well as to calculate total flow volume, including automatic transmission of measured data to an online database and graphical and tabular visualization of measured flows and total flow volumes.

Applications

  • Measuring seepage in construction and geology
  • Measuring the flow rate of small springs
  • Measuring the amount of water runoff from melting snow
  • Measuring the amount of drainage water

Technical specifications

Technical Specifications PF500 - Tipping-bowl Flowmeter
Paddle Volume approx. 500 ml (calibration constant adjustable in the connected unit)
Dimensions 300 mm x 300 mm x 250 mm (W x H x D)
Weight 2.2 kg
Tipping Detection magnetic reed switch
Relay Contact max 50 mA, 30 V
Pulse duration min 25 mS
Material of the float and support structure stainless steel
Float shaft bearing stainless steel ball bearings
Max. Tipping Frequency 10 tip-overs/min
Max. Recommended Measurable Flow Rate 5 L/min

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PF500 – Paddle-Type Tipping-Bowl Flowmeter



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